What’s the difference between heat exhaustion and heat stroke? One’s a medical emergency

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When British TV doctor Michael Mosley died last year in Greece after walking in extreme heat, local police said “heat exhaustion” was a contributing factor.

Since than a coroner could not find a definitive cause of death but said this was most likely due to an un-identified medical reason or heat stroke.

Heat exhaustion and heat stroke are two illnesses that relate to heat.

So what’s the difference?

Studio Nut/Shutterstock

A spectrum of conditions

Heat-related illnesses range from mild to severe. They’re caused by exposure to excessive heat, whether from hot conditions, physical exertion, or both. The most common ones include:

  • heat oedema: swelling of the hands, feet and ankles
  • heat cramps: painful, involuntary muscle spasms usually after exercise
  • heat syncope: fainting due to overheating
  • heat exhaustion: when the body loses water due to excessive sweating, leading to a rise in core body temperature (but still under 40°C). Symptoms include lethargy, weakness and dizziness, but there’s no change to consciousness or mental clarity
  • heat stroke: a medical emergency when the core body temperature is over 40°C. This can lead to serious problems related to the nervous system, such as confusion, seizures and unconsciousness including coma, leading to death.

As you can see from the diagram below, some symptoms of heat stroke and heat exhaustion overlap. This makes it hard to recognise the difference, even for medical professionals.

Heat exhaustion vs heat stroke venn diagram
CC BY-SA

How does this happen?

The human body is an incredibly efficient and adaptable machine, equipped with several in-built mechanisms to keep our core temperature at an optimal 37°C.

But in healthy people, regulation of body temperature begins to break down when it’s hotter than about 31°C with 100% humidity (think Darwin or Cairns) or about 38°C with 60% humidity (typical of other parts of Australia in summer).

This is because humid air makes it harder for sweat to evaporate and take heat with it. Without that cooling effect, the body starts to overheat.

Once the core temperature rises above 37°C, heat exhaustion can set in, which can cause intense thirst, weakness, nausea and dizziness.

If the body heat continues to build and the core body temperature rises above 40°C, a much more severe heat stroke could begin. At this point, it’s a life-threatening emergency requiring immediate medical attention.

At this temperature, our proteins start to denature (like an egg on a hotplate) and blood flow to the intestines stops. This makes the gut very leaky, allowing harmful substances such as endotoxins (toxic substances in some bacteria) and pathogens (disease causing microbes) to leak into the bloodstream.

The liver can’t detoxify these fast enough, leading to the whole body becoming inflamed, organs failing, and in the worst-case scenario, death.

Who’s most at risk?

People doing strenuous exercise, especially if they’re not in great shape, are among those at risk of heat exhaustion or heat stroke. Others at risk include those exposed to high temperatures and humidity, particularly when wearing heavy clothing or protective gear.

Outdoor workers such as farmers, firefighters and construction workers are at higher risk too. Certain health conditions, such as diabetes, heart disease, or lung conditions (such as COPD or chronic obstructive pulmonary disease), and people taking blood pressure medications, can also be more vulnerable.

Adults over 65, infants and young children are especially sensitive to heat as they are less able to physically cope with fluctuations in heat and humidity.

Firefighters holding hose, aimed at bushfire
Firefighters are among those at risk of heat-related illness. structuresxx/Shutterstock

How are these conditions managed?

The risk of serious illness or death from heat-related conditions is very low if treatment starts early.

For heat exhaustion, have the individual lie down in a cool, shady area, loosen or remove excess clothing, and cool them by fanning, moistening their skin, or immersing their hands and feet in cold water.

As people with heat exhaustion almost always are dehydrated and have low electrolytes (certain minerals in the blood), they will usually need to drink fluids.

However, emergency hospital care is essential for heat stroke. In hospital, health professionals will focus on stabilising the patient’s:

  • airway (ensure no obstructions, for instance, vomit)
  • breathing (look for signs of respiratory distress or oxygen deprivation)
  • circulation (check pulse, blood pressure and signs of shock).

Meanwhile, they will use rapid-cooling techniques including immersing the whole body in cold water, or applying wet ice packs covering the whole body.

Take home points

Heat-related illnesses, such as heat stroke and heat exhaustion, are serious health conditions that can lead to severe illness, or even death.

With climate change, heat-related illness will become more common and more severe. So recognising the early signs and responding promptly are crucial to prevent serious complications.

Matthew Barton, Senior lecturer, School of Nursing and Midwifery, Griffith University and Michael Todorovic, Associate Professor of Medicine, Bond University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • Syringe Exchange Fears Hobble Fight Against West Virginia HIV Outbreak

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    CHARLESTON, http://w.va/. — More than three years have passed since federal health officials arrived in central Appalachia to assess an alarming outbreak of HIV spread mostly between people who inject opioids or methamphetamine.

    Infectious disease experts from the Centers for Disease Control and Prevention made a list of recommendations following their visit, including one to launch syringe service programs to stop the spread at its source. But those who’ve spent years striving to protect people who use drugs from overdose and illness say the situation likely hasn’t improved, in part because of politicians who contend that such programs encourage illegal drug use.

    Joe Solomon is a Charleston City Council member and co-director of SOAR WV, a group that works to address the health needs of people who use drugs. He’s proud of how his close-knit community has risen to this challenge but frustrated with the restraints on its efforts.

    “You see a city and a county willing to get to work at a scale that’s bigger than ever before,” Solomon said, “but we still have one hand tied behind our back.”

    The hand he references is easier access to clean syringes.

    In April 2021, the CDC came to Charleston — the seat of Kanawha County and the state capital, tucked into the confluence of the Kanawha and Elk rivers — to investigate dozens of newly detected HIV infections. The CDC’s HIV intervention chief called it “the most concerning HIV outbreak in the United States” and warned that the number of reported diagnoses could be just “the tip of the iceberg.”

    Now, despite attention and resources directed toward the outbreak, researchers and health workers say HIV continues to spread. In large part, they say, the outbreak lingers because of restrictions state and local policymakers have placed on syringe exchange efforts.

    Research indicates that syringe service programs are associated with an estimated 50% reduction in HIV and hepatitis C, and the CDC issued recommendations to steer a response to the outbreak that emphasized the need for improved access to those services.

    That advice has thus far gone unheeded by local officials.

    In late 2015, the Kanawha-Charleston Health Department launched a syringe service program but shuttered it in 2018 under pressure, with then-Mayor Danny Jones calling it a “mini-mall for junkies and drug dealers.”

    SOAR stepped in, hosting health fairs at which it distributed naloxone, an opioid overdose reversal drug; offered treatment and referrals; provided HIV testing; and exchanged clean syringes for used ones.

    But in April 2021, the state legislature passed a bill limiting the number of syringes people could exchange and made it mandatory to present a West Virginia ID. The Charleston City Council subsequently added guidelines of its own, including requiring individual labeling of syringes.

    As a result of these restrictions, SOAR ceased exchanging syringes. West Virginia Health Right now operates an exchange program in the city under the restrictions.

    Robin Pollini is a West Virginia University epidemiologist who conducts community-based research on injection drug use. “Anyone I’ve talked to who’s used that program only used it once,” she said. “And the numbers they report to the state bear that out.”

    A syringe exchange run by the health department in nearby Cabell County — home to Huntington, the state’s largest city after Charleston — isn’t so constrained. As Solomon notes, that program exchanges more than 200 syringes for every one exchanged in Kanawha.

    A common complaint about syringe programs is that they result in discarded syringes in public spaces. Jan Rader, director of Huntington’s Mayor’s Office of Public Health and Drug Control Policy, is regularly out on the streets and said she seldom encounters discarded syringes, pointing out that it’s necessary to exchange a used syringe for a new one.

    In August 2023, the Charleston City Council voted down a proposal from the Women’s Health Center of West Virginia to operate a syringe exchange in the city’s West Side community, with opponents expressing fears of an increase in drug use and crime.

    Pollini said it’s difficult to estimate the number of people in West Virginia with HIV because there’s no coordinated strategy for testing; all efforts are localized.

    “You would think that in a state that had the worst HIV outbreak in the country,” she said, “by this time we would have a statewide testing strategy.”

    In addition to the testing SOAR conducted in 2021 at its health fairs, there was extensive testing during the CDC’s investigation. Since then, the reported number of HIV cases in Kanawha County has dropped, Pollini said, but it’s difficult to know if that’s the result of getting the problem under control or the result of limited testing in high-risk groups.

    “My inclination is the latter,” she said, “because never in history has there been an outbreak of injection-related HIV among people who use drugs that was solved without expanding syringe services programs.”

    “If you go out and look for infections,” Pollini said, “you will find them.”

    Solomon and Pollini praised the ongoing outreach efforts — through riverside encampments, in abandoned houses, down county roads — of the Ryan White HIV/AIDS Program to test those at highest risk: people known to be injecting drugs.

    “It’s miracle-level work,” Solomon said.

    But Christine Teague, Ryan White Program director at the Charleston Area Medical Center, acknowledged it hasn’t been enough. In addition to HIV, her concerns include the high incidence of hepatitis C and endocarditis, a life-threatening inflammation of the lining of the heart’s chambers and valves, and the cost of hospital resources needed to address them.

    “We’ve presented that data to the legislature,” she said, “that it’s not just HIV, it’s all these other lengthy hospital admissions that, essentially, Medicaid is paying for. And nothing seems to penetrate.”

    Frank Annie is a researcher at CAMC specializing in cardiovascular diseases, a member of the Charleston City Council, and a proponent of syringe service programs. Research he co-authored found 462 cases of endocarditis in southern West Virginia associated with injection drug use, at a cost to federal, state, and private insurers of more than $17 million, of which less than $4 million was recovered.

    Teague is further concerned for West Virginia’s rural counties, most of which don’t have a syringe service program.

    Tasha Withrow, a harm reduction advocate in bordering rural Putnam County, said her sense is that HIV numbers aren’t alarmingly high there but said that, with little testing and heightened stigma in a rural community, it’s difficult to know.

    In a January 2022 follow-up report, the CDC recommended increasing access to harm reduction services such as syringe service programs through expansion of mobile services, street outreach, and telehealth, using “patient-trusted” individuals, to improve the delivery of essential services to people who use drugs.

    Teague would like every rural county to have a mobile unit, like the one operated by her organization, offering harm reduction supplies, medication, behavioral health care, counseling, referrals, and more. That’s an expensive undertaking. She suggested opioid settlement money through the West Virginia First Foundation could pay for it.

    Pollini said she hopes state and local officials allow the experts to do their jobs.

    “I would like to see them allow us to follow the science and operate these programs the way they’re supposed to be run, and in a broader geography,” she said. “Which means that it shouldn’t be a political decision; it should be a public health decision.”

    KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF—an independent source of health policy research, polling, and journalism. Learn more about KFF.

    Subscribe to KFF Health News’ free Morning Briefing.

    This article first appeared on KFF Health News and is republished here under a Creative Commons license.

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  • Moore’s Clinically Oriented Anatomy – by Dr. Anne Argur & Dr. Arthur Dalley

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    Imagine, if you will, Grey’s Anatomy but beautifully illustrated in color and formatted in a way that’s easy to read—both in terms of layout and searchability, and also in terms of how this book presents anatomy described in a practical, functional context, with summary boxes for each area, so that the primary concepts don’t get lost in the very many details.

    (In contrast, if you have a copy of the famous Grey’s Anatomy, you’ll know it’s full of many pages of nothing but tiny dense text, a large amount of which is Latin, with occasional etchings by way of illustration)

    Another way in which this does a lot better than the aforementioned seminal work is that it also describes and discusses very many common variations and abnormalities, both congenital and acquired, so that it’s not just a text of “what a theoretical person looks like inside”, but rather also reflects the diverse reality of the human form (we weren’t made identically in a production line, and so we can vary quite a bit).

    The book is, of course, intended for students and practitioners of medicine and related fields, so what good is it to the lay person? Well, if you ask the average person where the gallbladder is and why we have one, they will gesture in the general direction of the abdomen, and sort of shrug sheepishly. You don’t have to be that person 🙂

    Bottom line: if you’d like to know your acetabulum from your zygomatic arch, this is the best anatomy book this reviewer has yet seen.

    Click here to check out Moore’s Clinically Oriented Anatomy, and prepare to be amazed!

    PS: this one is expensive, but consider it a fair investment in your personal education, if you’re serious about it!

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  • The Alzheimer’s Gene That Varies By Race & Sex

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    The Alzheimer’s Gene That Varies By Race & Sex

    You probably know that there are important genetic factors that increase or decrease Alzheimer’s Risk. If you’d like a quick refresher before we carry on, here are two previous articles on this topic:

    A Tale of Two Alleles

    It has generally been understood that APOE-ε2 lowers Alzheimer’s disease risk, and APOE-ε4 increases it.

    However, for reasons beyond the scope of this article, research populations for genetic testing are overwhelmingly white. If you, dear reader, are white, you may be thinking “well, I’m white, so this isn’t a problem for me”, you might still want to read on…

    An extensive new study, published days ago, by Dr. Belloy et al., looked at how these correlations held out per race and sex. They found:

    • The “APOE-ε2 lowers; APOE-ε4 increases” dictum held out strongest for white people.
    • In the case of Hispanic people, there was only a small correlation on the APOE-ε4 side of things, and none on the APOE-ε2 side of things per se.
    • East Asians also saw no correlation with regard to APOE-ε2 per se.
    • But! Hispanic and East Asian people had a reduced risk of Alzheimer’s if and only if they had both APOE-ε2 and APOE-ε4.
    • Black people, meanwhile, saw a slight correlation with regard to the protective effect of APOE-ε2, and as for APOE-ε4, if they had any European ancestry, increased European ancestry meant a higher increased risk factor if they had APOE-ε4. African ancestry, on the other hand, had a protective effect, proportional to the overall amount of that ancestry.

    And as for sex…

    • Specifically for white people with the APOE-ε3/ε4 genotype, especially in the age range of 60–70, the genetic risk for Alzheimer’s was highest in women.

    If you’d like to read more and examine the data for yourself:

    APOE Genotype and Alzheimer Disease Risk Across Age, Sex, and Population Ancestry

    Want to reduce your Alzheimer’s risk?

    We have just the thing for you:

    How To Reduce Your Alzheimer’s Risk: It’s Never Too Early To Do These 11 Things

    Take care!

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  • Thinking about trying physiotherapy for endometriosis pain? Here’s what to expect

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    Endometriosis is a condition that affects women and girls. It occurs when tissue similar to the lining of the uterus ends up in other areas of the body. These areas include the ovaries, bladder, bowel and digestive tract.

    Endometriosis will affect nearly one million Australian women and girls in their lifetime. Many high-profile Australians are affected by endometriosis including Bindi Irwin, Sophie Monk and former Yellow Wiggle, Emma Watkins.

    Symptoms of endometriosis include intense pelvic, abdominal or low back pain (that is often worse during menstruation), bladder and bowel problems, pain during sex and infertility.

    But women and girls wait an average of seven years to receive a diagnosis. Many are living with the burden of endometriosis and not receiving treatments that could improve their quality of life. This includes physiotherapy.

    Netpixi/Shutterstock

    How is endometriosis treated?

    No treatments cure endometriosis. Symptoms can be reduced by taking medications such as non-steriodal anti-inflammatories (ibuprofen, aspirin or naproxen) and hormonal medicines.

    Surgery is sometimes used to diagnose endometriosis, remove endometrial lesions, reduce pain and improve fertility. But these lesions can grow back.

    Whether they take medication or have surgery, many women and girls continue to experience pain and other symptoms.

    Pelvic health physiotherapy is often recommended as a non-drug management technique to manage endometriosis pain, in consultation with a gynaecologist or general practitioner.

    The goal of physiotherapy treatment depends on the symptoms but is usually to reduce and manage pain, improve ability to do activities, and ultimately improve quality of life.

    What could you expect from your first appointment?

    Physiotherapy management can differ based on the severity and location of symptoms. Prior to physical tests and treatments, your physiotherapist will comprehensively explain what is going to happen and seek your permission.

    They will ask questions to better understand your case and specific needs. These will include your age, weight, height as well as the presence, location and intensity of symptoms.

    You will also be asked about the history of your period pain, your first period, the length of your menstrual cycle, urinary and bowel symptoms, sexual function and details of any previous treatments and tests.

    They may also assess your posture and movement to see how your muscles have changed because of the related symptoms.

    Physio assesses patient
    During the consultation, your physio will assess you for painful areas and muscle tightness. Netpixi/Shutterstock

    They will press on your lower back and pelvic muscles to spot painful areas (trigger points) and muscle tightness.

    If you consent to a vaginal examination, the physiotherapist will use one to two gloved fingers to assess the area inside and around your vagina. They will also test your ability to coordinate, contract and relax your pelvic muscles.

    What type of treatments could you receive?

    Depending on your symptoms, your physiotherapist may use the following treatments:

    General education

    Your physiotherapist will give your details about the disease, pelvic floor anatomy, the types of treatment and how these can improve pain and other symptoms. They might teach you about the changes to the brain and nerves as a result of being in long-term pain.

    They will provide guidance to improve your ability to perform daily activities, including getting quality sleep.

    If you experience pain during sex or difficulty using tampons, they may teach you how to use vaginal dilators to improve flexibility of those muscles.

    Pelvic muscle exercises

    Pelvic muscles often contract too hard as a result of pain. Pelvic floor exercises will help you contract and relax muscles appropriately and provide an awareness of how hard muscles are contracting.

    This can be combined with machines that monitor muscle activity or vaginal pressure to provide detailed information on how the muscles are working.

    Yoga, stretching and low-impact exercises

    Yoga, stretching and low impact aerobic exercise can improve fitness, flexibility, pain and blood circulation. These have general pain-relieving properties and can be a great way to contract and relax bigger muscles affected by long-term endometriosis.

    These exercises can help you regain function and control with a gradual progression to perform daily activities with reduced pain.

    Physio talks to woman resting her feet on a fit ball
    Low-impact exercise can reduce pain. ABO Photography/Shutterstock

    Hydrotherapy (physiotherapy in warm water)

    Performing exercises in water improves blood circulation and muscle relaxation due to the pressure and warmth of the water. Hydrotherapy allows you to perform aerobic exercise with low impact, which will reduce pain while exercising.

    However, while hydrotherapy shows positive results clinically, scientific studies to show its effectiveness studies are ongoing.

    Manual therapy

    Women frequently have small areas of muscle that are tight and painful (trigger points) inside and outside the vagina. Pain can be temporarily reduced by pressing, massaging or putting heat on the muscles.

    Physiotherapists can teach patients how to do these techniques by themselves at home.

    What does the evidence say?

    Overall, patients report positive experiences pelvic health physiotherapists treatments. In a study of 42 women, 80% of those who received manual therapy had “much improved pain”.

    In studies investigating yoga, one study showed pain was reduced in 28 patients by an average of 30 points on a 100-point pain scale. Another study showed yoga was beneficial for pain in all 15 patients.

    But while some studies show this treatment is effective, a review concluded more studies were needed and the use of physiotherapy was “underestimated and underpublicised”.

    What else do you need to know?

    If you have or suspect you have endometriosis, consult your gynaecologist or GP. They may be able to suggest a pelvic health physiotherapist to help you manage your symptoms and improve quality of life.

    As endometriosis is a chronic condition you may be entitled to five subsidised or free sessions per calendar year in clinics that accept Medicare.

    If you go to a private pelvic health physiotherapist, you won’t need a referral from a gynaecologist or GP. Physiotherapy rebates can be available to those with private health insurance.

    The Australian Physiotherapy Association has a Find a Physio section where you can search for women’s and pelvic physiotherapists. Endometriosis Australia also provides assistance and advice to women with Endometriosis.

    Thanks to UTS Masters students Phoebe Walker and Kasey Collins, who are researching physiotherapy treatments for endometriosis, for their contribution to this article.

    Peter Stubbs, Senior Lecturer in Physiotherapy, University of Technology Sydney and Caroline Wanderley Souto Ferreira, Visiting Professor of Physiotherapy, University of Technology Sydney

    This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • Securely Attached – 

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    A lot of books on attachment theory are quite difficult to read. They’re often either too clinical with too much jargon that can feel like incomprehensible psychobabble, or else too wishy-washy and it starts to sound like a horoscope for psychology enthusiasts.

    This one does it better.

    The author gives us a clear overview and outline of attachment theory, with minimal jargon and/but clearly defined terms, and—which is a boon for anyone struggling to remember which general attachment pattern is which—color-codes everything consistently along the way. This is one reason that we recommend getting a print copy of the book, not the e-book.

    The other reason to invest in the print copy rather than the e-book is the option to use parts of it as a workbook directly—though if preferred, one can simply take the prompts and use them, without writing in the book, of course.

    It’s hard to say what the greatest value of this book is because there are two very strong candidates:

    • Super-clear and easy explanation of Attachment Theory, in a way that actually makes sense and will stick
    • Excellent actually helpful advice on improving how we use the knowledge that we now have of our own attachment patterns and those of others

    Bottom line: if you’d like to better understand Attachment Theory and apply it to your life, but have been put off by other presentations of it, this is the most user-friendly, no-BS version that this reviewer has seen.

    Click here to check out Securely Attached, and upgrade your relationship(s)!

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  • With all this bird flu around, how safe are eggs, chicken or milk?

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    Enzo Palombo, Swinburne University of Technology

    Recent outbreaks of bird flu – in US dairy herds, poultry farms in Australia and elsewhere, and isolated cases in humans – have raised the issue of food safety.

    So can the virus transfer from infected farm animals to contaminate milk, meat or eggs? How likely is this?

    And what do we need to think about to minimise our risk when shopping for or preparing food?

    AS Foodstudio/Shutterstock

    How safe is milk?

    Bird flu (or avian influenza) is a bird disease caused by specific types of influenza virus. But the virus can also infect cows. In the US, for instance, to date more than 80 dairy herds in at least nine states have been infected with the H5N1 version of the virus.

    Investigations are under way to confirm how this happened. But we do know infected birds can shed the virus in their saliva, nasal secretions and faeces. So bird flu can potentially contaminate animal-derived food products during processing and manufacturing.

    Indeed, fragments of bird flu genetic material (RNA) were found in cow’s milk from the dairy herds associated with infected US farmers.

    However, the spread of bird flu among cattle, and possibly to humans, is likely to have been caused through contact with contaminated milking equipment, not the milk itself.

    The test used to detect the virus in milk – which uses similar PCR technology to lab-based COVID tests – is also highly sensitive. This means it can detect very low levels of the bird flu RNA. But the test does not distinguish between live or inactivated virus, just that the RNA is present. So from this test alone, we cannot tell if the virus found in milk is infectious (and capable of infecting humans).

    Rows of milk bottles in supermarket fridge
    It’s best to stick with pasteurised milk. Amnixia/Shutterstock

    Does that mean milk is safe to drink and won’t transmit bird flu? Yes and no.

    In Australia, where bird flu has not been reported in dairy cattle, the answer is yes. It is safe to drink milk and milk products made from Australian milk.

    In the US, the answer depends on whether the milk is pasteurised. We know pasteurisation is a common and reliable method of destroying concerning microbes, including influenza virus. Like most viruses, influenza virus (including bird flu virus) is inactivated by heat.

    Although there is little direct research on whether pasteurisation inactivates H5N1 in milk, we can extrapolate from what we know about heat inactivation of H5N1 in chicken and eggs.

    So we can be confident there is no risk of bird flu transmission via pasteurised milk or milk products.

    However, it’s another matter for unpasteurised or “raw” US milk or milk products. A recent study showed mice fed raw milk contaminated with bird flu developed signs of illness. So to be on the safe side, it would be advisable to avoid raw milk products.

    How about chicken?

    Bird flu has caused sporadic outbreaks in wild birds and domestic poultry worldwide, including in Australia. In recent weeks, there have been three reported outbreaks in Victorian poultry farms (two with H7N3 bird flu, one with H7N9). There has been one reported outbreak in Western Australia (H9N2).

    The strains of bird flu identified in the Victorian and Western Australia outbreaks can cause human infection, although these are rare and typically result from close contact with infected live birds or contaminated environments.

    Therefore, the chance of bird flu transmission in chicken meat is remote.

    Nonetheless, it is timely to remind people to handle chicken meat with caution as many dangerous pathogens, such as Salmonella and Campylobacter, can be found on chicken carcasses.

    Always handle chicken meat carefully when shopping, transporting it home and storing it in the kitchen. For instance, make sure no meat juices cross-contaminate other items, consider using a cool bag when transporting meat, and refrigerate or freeze the meat within two hours.

    Avoid washing your chicken before cooking to prevent the spread of disease-causing microbes around the kitchen.

    Finally, cook chicken thoroughly as viruses (including bird flu) cannot survive cooking temperatures.

    Are eggs safe?

    The recent Australian outbreaks have occurred in egg-laying or mixed poultry flocks, so concerns have been raised about bird flu transmission via contaminated chicken eggs.

    Can flu viruses contaminate chicken eggs and potentially spread bird flu? It appears so. A report from 2007 said it was feasible for influenza viruses to enter through the eggshell. This is because influenza virus particles are smaller (100 nanometres) than the pores in eggshells (at least 200 nm).

    So viruses could enter eggs and be protected from cleaning procedures designed to remove microbes from the egg surface.

    Therefore, like the advice about milk and meat, cooking eggs is best.

    The US Food and Drug Administration recommends cooking poultry, eggs and other animal products to the proper temperature and preventing cross-contamination between raw and cooked food.

    In a nutshell

    If you consume pasteurised milk products and thoroughly cook your chicken and eggs, there is nothing to worry about as bird flu is inactivated by heat.

    The real fear is that the virus will evolve into highly pathogenic versions that can be transmitted from human to human.

    That scenario is much more frightening than any potential spread though food.

    Enzo Palombo, Professor of Microbiology, Swinburne University of Technology

    This article is republished from The Conversation under a Creative Commons license. Read the original article.

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    Learn to Age Gracefully

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