Species from the Anatidae family, in particular, the Anatinae subfamily (ducks), represent the highest risk for transmission to domestic poultry (16,17) for the following reasons: 1) Anatids harbor the most diverse and highest prevalence of avian influenza viruses
(13,14); 2) historical outbreaks of HPAI in poultry have been linked mainly to strains circulating in ducks, rather than in members of other species (18,19); 3) domestic ducks (mallards) can excrete large amounts of HPAI H5N1 virus
while remaining relatively healthy and are thus able to move the virus
across large distances (7); and 4) direct contacts between wild anatids and domestic aquatic poultry are believed to be relatively more common than with other groups of wild birds (20).
Naturally, few people suspected West Nile to be the bird-and-human killer because the virus
was once limited to foreign shores.
can cause fever, headache, and other symptoms in infected people, but any illness usually passes within a week.
-- which also has the attributes of a ``worm'' because it propels itself through computer networks -- primarily spreads when computer users open an attachment on the ``ILOVEYOU'' e-mail.
AOL will also allow IE users to install a free security toolbar when they download Active Virus
In studies conducted by Alford and colleagues (18), volunteers were exposed to carefully titrated aerosolized influenza virus
suspensions by inhaling 10 L of aerosol through a face mask.
The scientists aim to intersperse virus
cages with the ferritin-like cages to create two-dimensional arrays that could be incorporated into magnetic data-storage devices.
Under an electron microscope (which uses beams of electrons instead of light rays), scientists magnify the virus
writers abandon their adolescent mischief when they reach their 20s.
The source of infection was traced to an unrecognized exposure to the patient in New Jersey only after analysis of the Netherlands viral sequence demonstrated complete identity with the New Jersey genotype B3 virus
Because New World wildlife has not had to contend with the virus
before, defenses aren't in place.
Fifteen isolations of LBV have been reported, including 8 from fruit bats and a cat in KwaZulu-Natal Province of South Africa, but the virus
has never been associated with human disease (2,3).