Bovine protozoal abortion (BPA) is a newly recognized fetal infection caused by a Neospora- like protozoan parasite. Aborted fetuses have characteristic histologic lesions of focal nonsuppurative ...necrotizing encephalitis, nonsuppurative myocarditis and myositis. The diagnosis is confirmed by immunohistochemistry using antisera to Neospora caninum on the fetal tissues6,11. Neospora - like protozoa abortions were first reported from an abortion storm in a dairy in New Mexico14 and are now recognized as an important, widely distributed cause of abortion1-5,8,9,12-14. The infection has been identified in 413 fetal samples submitted to the California Veterinary Diagnostic Laboratory for immunohistochemistry. These samples represented 224 herds in 10 states in the United States as well as Mexico and Canada The infection is common in California where it is the most frequently diagnosed cause of bovine abortion2,5. In this study, data from bovine abortion submissions to the California Veterinary Diagnostic Laboratory (CVDL) from the San Joaquin Valley over a 6 year period are examined. The objectives were to determine the prevalence rate and temporal and seasonal patterns of occurrence of BPA.
Reviews Fishco, Daniel T.; Layton, James R.; Ganschow, Leonore ...
Reading World,
19/5/1/, Letnik:
23, Številka:
4
Book Review
Adult education books: spotlight on basic skills
Daniels, Paul R. Teaching the Gifted/ Learning Disabled Child. Rockville, MD, Aspen Systems Corporation, 1983. 222 pp. $23.85.
PARKER, Robert P., and ...DAVIS, Frances A. (Eds.) Developing Literacy: Young Children's Use of Language. Newark, Delaware: International Reading Association, 1983. Pp. iii + 189.
Geoffrion, Leo and Geoffrion, Olga. Computers and Reading Instruction. Reading, Massachusetts: Addison-Wesley, 1983.
Purkey, William Watson and NOVAK, John M. Inviting School Success. Belmont: Wadsworth Publishing Company, 1984, pp. 159.
