Bird Flu & Swine Flu News

Thursday, January 10, 2008

How bird flu is manifested in humans

by Groshan Fabiola

Professor Peter Openshaw, head of respiratory infections at National Heart and Lung Institute, Imperial College, London answered some questions regarding bird flu symptoms.
Which are the symptoms of the bird flu in humans? The symptoms of bird flu in humans are similar with those of an ordinary flu with fever, cough, muscle aches and short breath. Pay attention if your temperature goes up to 38 degrees, it might be bird flu but, if the temperature is lower it might be only a common flu. In almost half of the cases bird flu seems to be like an abdominal flu with diarrhea, abdominal pain, vomiting. So, to be sure you should perform some tests, if you hadn't been in contact with sick poultry then you don't need to worry for sure it's only an ordinary flu.

How to be sure that is bird flu and not any other common flu? After the exposure in 3-7 days the symptoms develop. By the time patients get to the hospital it is too late to follow a treatment with antiviral agents.

How quickly is manifested the disease ? Bird flu should be treated within two days after developing fever of 38 degrees, that's why is so important to measure your temperature. Severe symptoms that lead to death: The organ which is most affected is the lung and that's why most people die. Some are developing kidney problems and more than a half bone marrow deficiency, so the bone is not producing cells to deal with the infection so the body is overwhelmed.

What is to be done if someone suspects that he is infected? It is very important to get close to a medical facility that can provide artificial ventilation if necessary and antiviral drugs, especially in the early stages of the disease. Next, the treatment is supportive and needs to overcome the kidney or lung failure and the spreading of the virus. The only subtype that can cause severe illness to people is Influenza A /H5N1 virus, initially it affects chickens, ducks and other birds by the process of mutation they can become highly pathogenic. Because highly pathogenic viruses can survive for long periods in tissue, water and in the environment, especially when temperatures are low is transmitted very easily in chickens and other birds through direct contact with feces and secretions from infected birds, eggs, feed, water, cages equipment, vehicles and clothing. Public health authorities monitor human illnesses associated with avian influenza. In Hong-Kong occured for the first time infection both in humans and poultry and were killed about 1.5 million chickens. In China and Hong-Kong avian influenza A (H9N2) virus infection affected two children who recovered. The source was unknown, but suspected the poultry.

About the Author
For more information about bird flu or even about symptoms of bird flu please review this page http://www.bird-flu-info-center.com/symptoms-of-bird-flu.htm

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How bird flu is manifested in humans

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Blogger Dipl.-Ing. Wilfried Soddemann said...

H5N1 avian flu: Spread by drinking water

There is a widespread link between avian flu and water, e.g. in Egypt to the Nile delta or Indonesia to residential districts of less prosperous humans with backyard flocks and without central water supply as in Vietnam: http://www.cdc.gov/ncidod/EID/vol12no12/06-0829.htm. See also the WHO webside: http://www.who.int/water_sanitation_health/emerging/h5n1background.pdf and http://www.umwelt-medizin-gesellschaft.de/ abstract in English “Influenza: Initial introduction of influenza viruses to the population via abiotic water supply versus biotic human viral respirated droplet shedding” and http://www.thelancet.com/journals/laninf/article/PIIS1473309907700294/abstract?iseop=true “Transmission of influenza A in human beings”.
Avian flu infections may increase in consequence to increase of virus circulation. Transmission of avian flu by direct contact to infected poultry is an unproved assumption from the WHO. Infected poultry can everywhere contaminate the drinking water. All humans have contact to drinking water. Special in cases of decentral water supplies this pathway can explain small cluster in households. In hot climates and the tropics flood-related influenza is typical after extreme weather and natural after floods. The virulence of the influenza virus depends on temperature and time. If young and fresh H5N1 contaminated water from low local wells, cisterns, tanks, rain barrels or rice fields is used for water supply the water temperature for infection may be higher (at 24°C the virulence of influenza viruses amount to 2 days) as in temperate climates (for “older” water from central water supplies cold water is decisive to virulence of viruses: at 7°C the virulence of influenza viruses amount to 14 days).
Human to human and contact transmission of influenza occur - but are overvalued immense. In the course of influenza epidemics in Germany, recognized cluster are rare, accounting for just 9 percent of cases in the 2005 season. In temperate climates the lethal H5N1 virus will be transferred to humans via cold drinking water, as with the birds in February and March 2006, strong seasonal at the time when drinking water has its temperature minimum.
The performance to eliminate viruses from the drinking water processing plants regularly does not meet the requirements of the WHO and the USA/USEPA. Conventional disinfection procedures are poor, because microorganisms in the water are not in suspension, but embedded in particles. Even ground water used for drinking water is not free from viruses.
In temperate climates strong seasonal waterborne infections like the norovirus, rotavirus, salmonella, campylobacter and - differing from the usual dogma - influenza are mainly triggered by drinking water, dependent on the water's temperature (in Germany it is at a minimum in February and March and at a maximum in August). There is no evidence that influenza primarily is transmitted by saliva droplets. In temperate climates the strong interdependence between influenza infections and environmental temperatures can't be explained by the primary biotic transmission by saliva droplets from human to human at temperatures of 37.5°C. There must be an abiotic vehicle like cold drinking water. There is no other appropriate abiotic vehicle. In Germany about 98 percent of inhabitants have a central public water supply with older and better protected water. Therefore, in Germany cold water is decisive to the virulence of viruses.

Dipl.-Ing. Wilfried Soddemann - Free Science Journalist - soddemann-aachen@t-online.de - http://www.dugi-ev.de/information.html - Epidemiological Analysis: http://www.dugi-ev.de/TW_INFEKTIONEN_H5N1_20071019.pdf

January 11, 2008 at 7:42 AM  

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