THOUGH the direct agglutination test in brucellosis is usually positive at a titre of 1/80 or over, there is a small proportion of bacteriologically proved cases which fail to show direct ...

In a convenience survey of dairy goats on 9 farms in Tennessee, Kentucky, and Georgia, 54 of 99 females were positive for antibodies to Toxoplasma gondii as measured by the indirect hemagglutination ...

Rotavirus is an important cause of childhood gastroenteritis resulting in dehydration, hospital admission and nosocomial infections. False negative antigen tests may lead to further unnecessary ...