The study, conducted by scientists at the University of Rochester Medical Center, is based on an analysis of more than 100,000 genetic snippets of a virus known as SIV, or simian immunodeficiency virus, which infects monkeys and is a close cousin of HIV.

Lead investigator Ha Youn Lee, the assistant professor in the Department of Biostatistics and Computational Biology, said: “Viral escape is a significant phenomenon in HIV – it’s what allows HIV to elude the immune system. The dynamics in the earliest stage of infection by HIV are incredibly complex, and understanding what happens is crucial for developing a vaccine.

” Lee’s team analysed the genetic features of three key sections of the SIV genome as they changed during the first few months of infection in eight macaque monkeys, part of an effort to quantify how quickly the process of viral escape occurs. But the most striking finding is that the original viral genetic sequences are still present in the body months after the initial infection, at a time that scientists call the ‘viral set point,’ which occurs about two to five months after infection.

It’s a signal of just how difficult it is for the body to eradicate HIV from the body – key portions of the virus have managed to survive despite the immense immune assault.

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Crohn’s disease, which affects approximately 500,000 Americans, causes diarrhea, abdominal pain and infections, and can lead to complications requiring surgery. Some people with Crohn’s have mutations in their Atg16L1 gene, but the mutations are much more prevalent than the disease.

When they fed the mice dextran sodium sulfate (DSS), a chemical used to simulate gut injury, additional Crohn’s-like pathologies appeared, but only in the presence of the mouse norovirus.

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The first pool of mosquitoes to test positive for West Nile virus this year in Franklin County has been found in a trap in Hilliard.

The virus first made its way to Ohio in 2001 in a blue jay. The number of human cases in the state has decreased each year since 441 were reported in 2002. Last year, 243 mosquito pools tested positive for the virus statewide and two human cases were reported, one in Lucas County and one in Cuyahoga County.

Columbus Public Health is moving its spraying up a few days after trapping swarms of mosquitoes in several areas around the city.

Trucks will begin spraying Monday, said Keith Krinn, environmental health administrator for the city.

Some traps have yielded 300 to 600 mosquitoes apiece, Krinn said.

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Mrs. Kumar was in tears. Her son, an accomplished swimmer was competing in the national selections and he had been falling sick often over the last eight weeks. She consulted the paediatrician. The boy had low grade fever, cramping abdominal pain, diarrhoea, vomiting, loss of appetite, fatigue and weight loss, decelerating his coaching at a very crucial juncture… Read more

As monsoon hits many regions of the country, so does the fear of swine flu. The deadly H1N1 virus is said to increase with a dip in the temperature and monsoon is considered the best time for their spread. The number of H1N1 positive cases has already gone up in states like Kerala and Maharashtra… Read more

Mosquito samples collected in Tazewell County have tested positive for West Nile virus. “With the warmer weather, more people will be outside. West Nile Virus is in our area and we would like people to take precautions to prevent this disease,” Amy Tippey, director of health for Tazewell County, said in a news statement issued Sunday by the county’s health department… Read more

H1N1 flu vaccines will be widely available across Karnataka. State drug controller Dr B R Jag Shetty told TOI on Wednesday: “It’s been two days now that vaccines are available in the state. It’s a multidose vaccine with ten dose vials each. Since it’s usually purchased by doctors, it’s directly supplied by wholesalers. Some retail pharmacies have also purchased these vaccines and selling them too. Tamiflu drugs are available in most Schedule X pharmacies in the state.”.. Read more

Up to 55 New Zealand women may have been exposed to an apparent deliberate attempt to infect them with a potentially fatal virus at a Melbourne abortion clinic. The Ministry of Health is helping Australian health authorities to trace 55 New Zealand women who visited the private clinic between early 2006 and late last year… Read more

The same mutated gene that makes humans more susceptible to the potentially fatal West Nile virus is also responsible for the virus affecting horses, according to scientists at the University of Adelaide, Australia. A naturally occurring mutation of the OAS1 gene has now been confirmed as increasing the vulnerability of horses to the West Nile virus, thanks to a study led by Professor David Adelson (University of Adelaide) and conducted by PhD student Jonathan Rios (Texas A&M University)… Read more

a novel influenza A (H1N1) virus emerged in the United States with the key characteristics of a pandemic virus, and within weeks it had spread to every region in the country… Read more