human exposure to brucella abortus strain rb51--kansas, 1997.on may 26-27, 1997, nine persons (a farmer, four veterinary clinicians, and four veterinary students) in manhattan, kansas, participated in an attempted vaginal delivery, a cesarean delivery, and a necropsy on a stillborn calf that died because of brucella abortus infection. the infection was confirmed by isolation of b. abortus from placental and fetal lung tissue cultures. the national animal disease center, u.s. department of agriculture (usda), identified the b. abortus isolate from the calf ...19989518281
development, testing and commercialization of a new brucellosis vaccine for cattle.vaccines used against brucellosis do not generally protect completely against infection or abortion. genetic analysis has revealed differences in arrangements of dna sequences between these vaccine strains and the virulent parent strain and permits the specific identification of field isolates of b. abortus as wild-type or vaccine strain. b. abortus strain 19 is a low-virulence, live vaccine developed for use in cattle. although it is effective, strain 19 vaccine had a tropism for the placenta a ...200011193615
surveys for disease agents in introduced elk in arkansas and kentucky.surveys for disease agents were conducted in introduced free-ranging elk (cervus elaphus nelsoni) in arkansas and kentucky. elk had been captured in colorado and nebraska and released in arkansas during 1981-1985. from 1997 through 2002 elk were captured in arizona, kansas, north dakota, new mexico, oregon, and utah and released in southeastern kentucky. specimens were collected from 170 hunter-killed elk in arkansas during 1998-2006, and 44 elk in kentucky during 2001-2004. significant findings ...201020090032
Displaying items 1 - 3 of 3