Category Archives: AWAREmed Health and Wellness Resource Center

Breast Cancer and Alcohol; Role of Alcohol

Breast cancer and Alcohol-Role of alcohol

Breast cancer and Alcohol-Definition

Breast Cancer and Alcohol; Role of Alcohol

Alcohol has great effect on the causes of cancer, keep health by a voiding alcohol

Breast cancer is that which forms in tissues of the breast. The most common type of breast cancer is ductal carcinoma, which begins in the lining of the milk ducts (thin tubes that carry milk from the lobules of the breast to the nipple).

Another type of breast cancer is lobular carcinoma, which begins in the lobules (milk glands) of the breast. Invasive breast cancer is breast cancer that has spread from where it began in the breast ducts or lobules to surrounding normal tissue. Breast cancer occurs in both men and women, although male breast cancer is rare.

Breast cancer and Alcohol-Potential link between alcohol consumption and the cancer

Scientists looking at particular enzyme found a biological molecule that accelerates chemical reactions known as CYP2E1. Their findings offer a possible target to improve outcomes for patients in the later stages of the disease.

This enzyme, known as CYP2E1, has been implicated in various liver diseases linked to alcohol consumption, Alcoholic Liver Disease (ALD), as well as diabetes, obesity and cancer. That is Breast Cancer and Alcohol are closely linked.

They wanted to understand why an enzyme known to function mainly in the liver was found to be heavily present in some types of breast cancer tissues. They also wanted to explore what other activities this enzyme might have that control the development of breast cancer. Their findings revealed that the enzyme breaks down various molecules within cells, including alcohol. The by-products of this metabolism include reactive oxygen species (ROS), resulting in something called oxidative stress, in normal physiological conditions this aids cellular functions, whereas when concentrations of ROS are high or oxidative stress becomes chronic, cells can be seriously damaged. Breast Cancer and Alcohol are closely related.

Previous studies have shown that the enzyme is most strongly expressed in early stages of breast tumors rather than more developed tumors and scientists believe that it contributes to the progression of breast cancer.

The study, published in Breast Cancer Research, found that depending on the stage of the breast cancer, high levels of the enzyme can help cells survive during stress. It was also found that inhibiting the activity of the enzyme in cells with high migratory potential promoted cell migration a process linked to cancer spreading known as metastasis.

Breast cancer and Alcohol-Causes and risk factors 

We have not fully understood the causes of breast cancer, as a result of this may be difficult to say with certainty why one woman may develop breast cancer and another may not. However the risk factors are known, some of these can change the likelihood that someone may develop breast cancer. There are some factors you cannot do anything about, but there are some you can change.

Alcohol

Your risk of developing breast cancer can increase with the amount of alcohol you drink. Research shows that, for every 200 women who regularly have two alcoholic drinks a day, there are three more women with breast cancer compared with women who do not drink at all. That study confirms that Breast Cancer and Alcohol has a cause and effect relationship.

Age

The risk of developing breast cancer increases as you get older. Breast cancer is most common among women over 50 who have been through the menopause. 8 out of 10 breast cancer cases occur in women over 50.

All women between 50 and 70 years of age should be screened for breast cancer every three years as part of the NHS Breast Screening programme. Women over the age of 70 are still eligible to be screened and can arrange this through their GP or local screening unit. Currently, there are ongoing pilot studies looking at widening the screening age range to 47-73.

Family history

If you have close relatives who have had breast cancer or ovarian cancer, you may have a higher risk of developing breast cancer. However, as breast cancer is the most common cancer in women, it is possible for it to occur more than once in the same family by chance.

Most breast cancer cases are not hereditary. However, particular genes, known as BRCA1 and BRCA2, can increase your risk of developing both breast and ovarian cancer. It is possible for these genes to be passed on from a parent to their child. If you have, for example, two or more close relatives from the same side of your family who have had breast cancer under the age of 50, you may be eligible for surveillance for breast cancer or for genetic screening to look for the genes that make developing breast cancer more likely.

Previous diagnosis of breast cancer

If you have previously had breast cancer or early non-invasive cancer cell changes contained within breast ducts, you have a higher risk of developing it again, either in your other breast or in the same breast again.

Previous benign breast lump

A benign breast lump does not mean you have breast cancer, but certain types of lump may slightly increase your risk of developing it. Certain benign changes in your breast tissue, such as atypical ductal hyperplasia (cells growing abnormally in ducts) or lobular carcinoma in situ (abnormal cells inside your breast lobes), can make getting breast cancer more likely. If you drink alcohol specially more than 2 glasses per day it will increase your risk to develop breast cancer. Breast cancer and alcohol go hand in hand.

Breast density

Your breasts are made up of thousands of tiny glands (lobules), which produce milk. This glandular tissue contains a higher concentration of breast cells than other breast tissue, making it denser. Women with denser breast tissue may have a higher risk of developing breast cancer because there are more cells that can become cancerous. This is specially true if you drink alcohol regularly. Breast cancer and alcohol have been closely associated.

Dense breast tissue can also make a breast scan (mammogram) harder to read because it makes any lumps or areas of abnormal tissue harder to spot. Younger women tend to have denser breasts. As you get older, the amount of glandular tissue in your breasts decreases and is replaced by fat, so your breasts become less dense.

Being overweight or obese

Breast Cancer and Alcohol; The role of Alcohol is more pronounced if you have been through the menopause and are overweight or obese, you may be more at risk of developing breast cancer. This is thought to be linked to the amount of estrogen in your body, as being overweight or obese after the menopause causes more estrogen to be produced.

Being tall

If you are taller than average, you are more likely to develop breast cancer than someone who is shorter than average. This may be due to interactions between genes, nutrition and hormones, but the reason is not fully understood.

Hormone replacement therapy (HRT)

Hormone replacement therapy (HRT) is associated with a slightly increased risk of developing breast cancer. Both combined HRT and estrogen-only HRT can increase your risk of developing breast cancer, although the risk is slightly higher if you take combined HRT. When you are considering HRT pay attention to the fact that Breast Cancer and Alcohol may play a role in Breast cancer development with HRT.

It is estimated there will be an extra 19 cases of breast cancer for every 1,000 women taking combined HRT for 10 years. The risk continues to increase slightly the longer you take HRT, but returns to normal once you stop taking it.

Breast cancer and Alcohol-Role of alcohol

 

 

 

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The source of death in Cocaine and Heroin

The source of death in Cocaine and Heroin-Drug Scourge

Heroin

There is evidence of heroin and cocaine deaths in male than female according to studies conducted

The society and the world over are weeping in great anguish of endless death thanks to the renewed vigor in drug usage. You take a walk in the streets and parks of our beautiful nations and you are saddened with what you see, young and old together drinking and smoking publicly and secretly. Our governments have legalized the use of some of these drugs and are making millions and millions of money inform of taxes all in the name of revenue for development, security and wellbeing of its citizens.

When you take a keen observation on majority of illness keeping patients in hospitals for weeks, months and even years are 90 percent related to the drug consumption. It does not matter the intensity of the consumption, whether one is an addict or not the common denominator is that both are using drugs. Legal or illegal, cheap or expensive whatever the adjective you choose to describe the noun drug we have patients in hospitals, at homes and learning institutions suffering from different illnesses associated with drug use.

Researches are working round the clock trying to find remedies for drug related problems and the authorities/governments are spending a big percentage of the revenue they collect from firms associated with drugs in treatment research and creating awareness of what they themselves are promoting in some way. Anyway there are numerous types of drugs being abused today and it is all important that we talk about them openly and without any shame. I beseech all of us to face the society with the real truth about the abuse of drugs but for the purpose of this article I want to zero in to two killer drugs in our society (especially in Europe) today that is Cocaine and Heroin.

The source of death in Cocaine and Heroin-Drug induced deaths

Much as there are many unreported cases, the number of reported drug-induced deaths today can be influenced by the prevalence and patterns of drug use (injection, polydrug use), the age and the co-morbidities of drug users, and the availability of treatment and emergency services, as well as by the quality of data collection and reporting. Improvements in the reliability of European data have allowed better descriptions of trends, and most countries have now adopted a case definition endorsed by the EMCDDA. Nevertheless, caution must be exercised when comparing countries because there are still differences in reporting methodology and data sources. But the common denominator is that drug induced deaths are skyrocketing.

The source of death in Cocaine and Heroin-Opioids

Opioids, mainly heroin or its metabolites, are present in the majority of drug-induced deaths reported in Europe. In the 22 countries providing data for 2008 or 2009, opioids accounted for the large majority of all cases: over 90 % in five countries, and between 80 % and 90 % in a further 12. Substances often found in addition to heroin include alcohol, benzodiazepines, other opioids and, in some countries, cocaine.

This suggests that a substantial proportion of all drug-induced fatalities occur in a context of polydrug use, as illustrated by a review of toxicology of drug-related deaths in Scotland in 2000-07. It showed that the presence of heroin and alcohol were positively associated, particularly among older males. Among men whose deaths were related to heroin, alcohol was present in 53 % of those aged 35 and more, compared to 36 % in cases under 35.

Men account for most overdose deaths reported in Europe at 81 %. Overall, there are around four males for each female case (with the ratio ranging from 1.4:1 in Poland to 31:1 in Romania). In the Member States that joined the EU more recently, reported drug-induced deaths are more likely in males and in younger people compared to the pre-2004 Member States and Norway. Patterns differ across Europe, with higher proportions of males reported in southern countries. Denmark, the Netherlands, Sweden and Norway report higher proportions of older cases. In the majority of countries, the average age of those dying of heroin overdoses is in the mid-thirties, and in many countries it is increasing.

A number of factors are associated with fatal and non-fatal heroin overdoses. These include injection and simultaneous use of other substances, in particular alcohol, benzodiazepines and some antidepressants. Other factors linked with overdoses are binge drug use, co-morbidity, homelessness, poor mental health (e.g. depression and intentional poisoning), not being in drug treatment, previous experience of overdose, and being alone at the time of overdose. The time immediately after release from prison or discharge from drug treatment is a particularly risky period for overdoses, as illustrated by a number of longitudinal studies.

The source of death in Cocaine and Heroin-Trends in drug-induced deaths

Drug-induced deaths increased sharply in Europe during the 1980s and early 1990s, paralleling the increase in heroin use and drug injection, and thereafter remained at high levels. Between 2000 and 2003, most EU Member States reported a decrease, followed by a subsequent increase from 2003 until 2008. Preliminary data available for 2009 suggest an overall figure equal to or slightly below that for 2008. Where a comparison is possible, the numbers of deaths reported have decreased in some of the largest countries, including Germany, Italy and the United Kingdom.

The reasons for the sustained or increasing numbers of reported drug-induced deaths in some countries are difficult to explain, especially given the indications of decreases in injecting drug use and increases in the numbers of opioid users in contact with treatment and harm-reduction services. Possible explanations include: increased levels of polydrug use or high-risk behavior; increases in the numbers of relapsing opioid users leaving prison or treatment; and an ageing cohort of more vulnerable drug users.

The source of death in Cocaine and Heroin-Overall mortality related to drug use

Overall mortality related to drug use comprises drug-induced deaths and those caused indirectly through the use of drugs, such as through the transmission of infectious diseases, cardiovascular problems and accidents. Deaths indirectly related to drug use are difficult to quantify, but their impact on public health can be considerable. Such deaths are mainly concentrated among problem drug users, although some (e.g. traffic accidents) occur among occasional users.

Estimates of overall drug-related mortality can be derived in various ways, for example by combining information from mortality cohort studies with estimates of drug use prevalence. Another approach is to use existing general mortality statistics and estimate the proportion related to drug use.

The source of death in Cocaine and Heroin-Drug Scourge

 

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Buprenorphine for the treatment of addiction

Buprenorphine for the treatment of addiction-Is it the best

Buprenorphine

If you are suffering from addiction seek treatment but remember Buprenorphine may not be a better option.

Buprenorphine is used to help you keep off street drugs such as heroin. It can prevent or reduce the unpleasant withdrawal symptoms when you stop using such drugs. It is a medicine that is similar to heroin and works as a replacement treatment. Many people choose to stay on buprenorphine long-term, although some people gradually reduce their dose and come off it.

The effects of buprenorphine last longer than heroin so it is usually prescribed as a once-daily dose. To begin with, you will usually be asked to take it under the supervision of the pharmacist who dispenses the buprenorphine to you. This means there can be no doubt about how much buprenorphine you take at each dose. This supervision may be relaxed after a few months of your taking a regular maintenance dose.

Buprenorphine is also available combined with another medicine called naloxone (the tablet brand name is Suboxone). Naloxone blocks the action of buprenorphine and the effect of the combination is that, if you are tempted to crush the tablet and try to inject it, you will start to get withdrawal effects.

Buprenorphine for the treatment of addiction-Can buprenorphine cause problems?

As with all medications, Buprenorphine (Suboxone) drug treatment also has some disadvantages. It is still a medication and if you prefer to break free from any kind of addiction immediately, then Buprenorphine may not be the way to go. Also, you may not be completely Buprenorphine-free by the time you leave drug treatment, even if you opt for an inpatient drug rehab program.

Some may consider these disadvantages while others consider them well worth the advantage of avoiding opiate withdrawal symptoms. Also, some initial studies on long-term use of Buprenorphine suggest that there are anti-depressant effects of the drug as well. The dosing schedule is also relatively easy to maintain as most don’t even have to take it every day. Additionally, you can’t abuse Suboxone, get high off of it or overdose on it like you can with some other opiate addiction maintenance or detox drugs, like methadone. Much as this may offer treatment for addiction, it is in itself addiction and should not be encouraged. Its demerits far much out ways the merits just have a look at the conditions lined below before and during its usage.

Buprenorphine for the treatment of addiction-Before taking buprenorphine

Some medicines are not suitable for people with certain conditions, and sometimes a medicine may only be used if extra care is taken. For these reasons, before you start taking buprenorphine it is important that your doctor knows:

  • If you have liver or kidney problems.
  • If you have prostate problems or any difficulties passing urine.
  • If you have any breathing problems, such as asthma or chronic obstructive pulmonary disease (COPD).
  • If you have been told you have low blood pressure.
  • If you have any problems with your thyroid or adrenal glands.
  • If you have epilepsy.
  • If you have a problem with your bile duct.
  • If you are pregnant or breast-feeding.
  • If you have been constipated for more than a week or have an inflammatory bowel problem.
  • If you have a condition causing muscle weakness, called myasthenia gravis.
  • If you have recently had a severe head injury.
  • If you have ever had an allergic reaction to a medicine.
  • If you are taking any other street drugs or medicines. This includes any medicines you are taking which are available to buy without a prescription, such as herbal and complementary medicines.

Buprenorphine for the treatment of addiction-Getting the most from your treatment

  • Some people feel uncomfortable during the first 2 to 3 days of taking buprenorphine. Do not be tempted to take heroin on top, and do not take more than the dose your doctor has prescribed for you.
  • It is important that you keep your regular appointments with your doctor or clinic so your progress can be reviewed. You will be asked to give a urine sample from time to time.
  • Buprenorphine cannot be supplied to you without a prescription. You will not be able to ask for any changes to be made to your supply, as your pharmacist can only dispense the prescription exactly as your doctor has directed.
  • There are several different brands and strengths of buprenorphine tablets, so each time you collect a supply, check to make sure it contains what you are expecting.
  • You are more likely to succeed in staying off heroin if you have support and counseling in addition to taking buprenorphine. Local drug community teams, self-help groups and other agencies may be of help. It is much harder to ‘do it alone’, so go for counseling and help if it is available in your area.
  • You should not take any street drugs or drink too much alcohol while you are on buprenorphine. This is because other street drugs such as benzodiazepines (benzos) and alcohol can affect buprenorphine and increase the chance of unwanted effects.
  • You should tell the DVLA that you are taking buprenorphine if you are a driver. You are likely to be banned from driving at first, although you may be allowed to drive again later, subject to an annual medical review. Your doctor will tell you when you can resume driving.
  • Do not stop taking buprenorphine without discussing this with your doctor or drug-team worker first. It is important that buprenorphine should be taken regularly to reduce the risk of withdrawal symptoms occurring. When you are ready to consider becoming drug-free, your doctor or drug-team worker will be able to help you decide on the best way to do this in order to keep withdrawal effects to a minimum.
  • If you are planning any trip abroad, you should carry a letter with you from your doctor to explain that you have been prescribed buprenorphine. This is because buprenorphine is classed as a ‘controlled drug’ and is subject to certain restrictions.
  • If you buy any medicines, check with a pharmacist that they are suitable for you to take with buprenorphine. Many other medicines have similar side-effects to buprenorphine and taking them together will increase the risk of unwanted effects.
  • If you are having an operation or dental treatment, tell the person carrying out the treatment that you are taking buprenorphine.

So many side effects and so many conditions attached making buprenorphine not to be right for addiction treatment not now and certainly not ever.

Buprenorphine for the treatment of addiction-Is it the best

 

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Social and health consequences of cocaine use

 

Social and health consequences of cocaine use-Addiction

Social and health consequences of cocaine use-Everyone is affected

cocaine

The use of cocaine has negative effects on the society

Almost on a daily basis on my way to my work place I pass a small park on the way. In this park and along the road a group of people is sitting, standing or lying down with bottles of wine in their hands or tins with beer. They are not very good looking and not presentable at all, sometimes they show up in rags and some have hairdos that look like a Zoo. They seem engaged in quite energetic talking but at the same time some sit listening quietly and some even seem to sleep.

This group is a group of street drinkers. They all know each other and their place of congregation is the little park. Quite clearly they have no jobs, at least not at the time I meet them socializing, majority of them are men.

On the other hand at my work place I have a different experience I talk to another group of people usually very well dressed people in a nice room, during lunch, dinner or at the occasion reception. A reception will be created when for instance someone says good bye as a professor and goes to another university. Also we have receptions after a doctoral thesis has been defended. During these receptions people stand and almost all have glasses in their hands, filled with red wine, white wine or sometimes even stronger drinks like gin or whiskey. People laugh, have energetic discussions or wander quietly from person to person. All of these people have jobs. They are both men and women, in almost equal proportions well-mannered and dressed sophistically.

Looking at these two groups observations serve as lesson. Tow lessons one in the sociology of drug use. The common drug that played a role in the two described situations was of course alcohol, hence the topic of my presentation in this, Cocaine use and its social and health consequences, will be modeled along the structure that these two situations allow me to create.

Cocaine users can be found in poor ghettos of cities of the world, but also in the suburbs or rich dwellings. But in our own cocaine user studies we found crack cocaine users among well employed highly functional completely integrated cocaine users. How then are we going to approach the question what health and social consequences cocaine use can have?

Lesson number two. We have to be prepared that a simple answer to this question does not exist. Quite clearly, as is the case in the two groups of alcohol users I started to describe, we should be ready to accept that the answers to the question may be very different from one kind of cocaine user to the next. Very much depends two things (1) on the group to which the user belongs and (2) the use patterns of the user.

In groups where unemployment is the rule, criminal behavior as well, poor housing conditions prevail and where social integration into dominant labour or family culture is low, the user of cocaine, or of alcohol, or of whatever drug will behave very differently from when the user is part of another sub culture. If you do not go to work, why would you stop using cocaine at 9 o’clock at night? If you do not have to impress your boss every morning by looking brilliant, the contextual restraints on your time management are really different than when you have.

If you are not part of a culture in which you eat every day, and eat well, the health consequences of alcohol, but also of cocaine, will be different than when you eat well and regularly. If you smoke cocaine to escape constantly some sort of social misery, the effect you seek are different from when you smoke cocaine to take off on an adventure of sexuality and excess.

Apparently people seek effects that they sometimes get from drugs, and try to get those effects again. The type of drug effects people seek can be very different, even with the same drug. The two types of alcohol users I introduced to you in the beginning, are seeking different types of effects from alcohol. The choice of effects depends very much on your social home, but also on your character and the interplay between situation and moods.

Social and health consequences of cocaine use-Scores of Variables

With alcohol we all know a typical kind of user, who will consume some alcohol every day, but in low amounts and to very low or even zero levels of intoxication. They visit a bar after work or have a drink at home while chatting with kids. One could give such a use pattern a name, like frequent use zero intoxication. This is a very neutral type of name. Another possibility is that a daily wine user, who chooses the wine very carefully to match the chosen food of the day, but not as a vehicle for intoxication, could be named as a gourmet alcohol user. The same is true for cocaine, although with cocaine users taste can be important, but in a very different way as for a wine user. A cocaine user will appreciate the mellow bitter taste, or the subtle freeze in the back of the tongue.

We have found a substantial proportion of cocaine users who would use the substance every day but with very little amounts, less than 0.5 gram a week, who like to experience the freeze, or the very mild post dinner stimulation, very much like people who have coffee after dinner. For this they need very small lines of cocaine, even if their wealth or available stock of cocaine in their office drawer would allow much greater quantities of use.

Social and health consequences of cocaine use-The story of the consequences

Looking at pattern of use plus looking at social or cultural group a user belongs; one can see distinct types of cocaine use where the social and health consequences are almost zero. If cocaine use does not interfere with eating, if it does not interfere with social functioning both in the inner group as in relation to outside groups the social consequences are nil.

However, it is possible to identify daily users of cocaine, where the amount of use is higher or very high, and where the level of intoxication is desired to be high, and where the user’s group is willing to create the social background for this type of frequent high intensity use. Here the social consequences will be small in the primary group to which the user belongs, but quite dramatically negative in relation to outside groups.

But we can see with alcohol, as with cocaine that some users will use to excess, or consume so much to support a particular behavior or emotional effect that even the inner group is not going to accept this. If this happens, as will occur with some users, the social consequences are severe. Heavy consumers will find themselves with deeply disturbed social relations, sometimes resulting in complete ostracism and even death. Quite probably these rare use patterns are driven by complex problems that justify the choice of these patterns although ultimately they may prove to be very counterproductive. Most often, such extreme use patterns are left behind as soon as the user finds some possibility of more useful adaptation.

However, also quite destructive social consequences can happen to a consumer of cocaine who has no conspicuous use pattern at all. Imagine someone who lives the life of a highly valued and well known adviser to the Minister of Health. However, in her free time she invites artists and actors to her very nice flat on the river side. Cocaine is snorted and one of the elderly guests makes a mistake, snorts too much cocaine on top of his whiskey and has a heart attack. The guest is taken to the hospital and fortunately survives, but the story is out and in the papers. You can avoid this by visiting AWAREmed Health and Wellness Resource Center under Doctor Akoury for help on addiction. They focus on Neuroendocrine Restoration (NER) to reinstate normality through realization of the oneness of Spirit, Mind, and Body, Unifying the threesome into ONE.

Social and health consequences of cocaine use-Addiction

 

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Lyme disease and Climate Change

Lyme disease and Climate Change-New Findings

Climate

Research has found out that Lyme disease is greatly associated with climate change.

Historically, Lyme disease is heavily present in the Northeastern United States due to its moderate climate. The feeding period of these ticks in the northeast is being prolonged due to the extended summer temperatures, allowing more time for uninfected larval ticks to become a carrier of the Lyme disease-causing bacteria. Researchers at Yale University have seen clear implications that as the planet warms, more reports of Lyme disease will be expected in the upper Midwest to match the amount of cases in the upper Northeast.

Lyme disease and Climate Change-Borrelia burgdorferi

Borrelia burgdorferi is the name of the bacteria that causes Lyme disease and the nymphal deer tick is the carrier of this pathogen, contracting it from its blood meal. When a pathogen carrying tick bites, the bacteria enters the bloodstream and the victim becomes infected

Lyme disease and Climate Change-Transportation of Lyme disease

Deer ticks have an average two year life span, with three main life stages larval, nymphal and adult. They obtain one meal consisting of blood during each main life phase in order to survive. If the source of their meal is infected with the Lyme disease-causing bacteria (Borrelia burgdorferi) then it is passed onto the tick. In the tick’s nymphal stage, it passes the infection to its next meal source human or other animal. This feeding cycle is seasonal and innately influenced by climate.

Lyme disease and Climate Change-How Lyme Enters the Food Chain

At the propagation of the larval deer tick is born it is not born as a carrier of the disease. The ticks need to obtain sustenance in order to survive; this nutrition comes in the form of a blood meal which they obtain by sucking the blood of other animals. If the larval tick gets a blood meal from a deer or in a more likely case, a mouse already carrying the disease, the larval tick is then infected with B. burgdorferi.

In order to reach the next phase of the tick’s life, the tick must obtain another blood meal in its nymphal stage, and in the feeding process the tick passes the pathogen on to its meal source, which in some cases is a human. The human will, as a result, become a host for the pathogen. Deer have been the main suspect in being the carrier of the B. burgdorferi, but research shows that this may not be the case because the deer has the ability to flush the disease out of its system. The new suspect is the white-footed mouse, whose body does not entirely dispose of the bacteria.

Lyme disease and Climate Change-What Climate Change means for Lyme disease?

Climate change will have the following effects on Lyme disease: An acceleration of the tick’s developmental cycle, a prolonged developmental cycle, increased egg production, increased population density, and a broader range of risk areas. The ideal habitat for these disease-carrying ticks is one with 85% humidity and a temperature higher than 45°F. The tick finds a suitable microclimate by using its thermo receptors.

Once the larvae have molted into the nymphal stage, the winter forces them to remain dormant until spring. An adult tick no longer needs to hibernate during the winter, so these ticks may become active on warm winter days, yielding a larger nymph population the following year. With an earlier winter thawing, nymphal-staged ticks will become active sooner. The warmer winters will also allow for a higher survival rate of the white-footed mouse, a popular host for the ticks, meaning an increased tick population in the spring and summer.

After discovering how global warming could impact on infectious disease, scientists from Yale University, in collaboration with other institutions, have determined that climate impacts the severity of Lyme disease by influencing the feeding patterns of deer ticks that carry and transmit it.

But, as the Yale team demonstrates, it’s the seasonal cycle of feeding for each stage of the tick’s life that determines the severity of infection in a given region. The researchers found that this cycle is heavily influenced by climate. In the moderate climate of the Northeastern United States, larval deer ticks feed in the late summer, long after the spring feeding of infected nymphs. This long gap between feeding times directly correlates to more cases of Lyme disease reported in the Northeast by the scientists.

When there is a longer gap, the most persistent infections are more likely to survive. These persistent bacterial strains cause more severe disease in humans, leading more people to seek medical attention and resulting in more cases.

But in the Midwest, where there are greater extremes of temperature, there is a shorter window of opportunity for tick feeding, and therefore a shorter gap between nymphal and larval feedings. Due to this, Midwestern wildlife and ticks are infected with less persistent strains, which correlates with fewer cases of Lyme disease reported in the Midwest.

The clear implication of this research is that, as the planet warms, the Upper Midwest could find itself in the same situation as the Northeast: longer gaps between nymphal and larval feeding, and therefore, stronger, more persistent strains of Lyme disease. Other diseases, like malaria, have also been projected to expand in response to climate change, but this is the first study to show how the severity of disease can also be related to climate.

Lyme disease and Climate Change-New Findings

 

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