Evidence suggesting a point source exposure in an outbreak of bovine abortion due to neosporosis.
A Holstein dairy farm suffered an abortion outbreak due to neosporosis. Abortion losses were > 18%. Cows with the highest Neospora antibody titers were at the greatest risk of aborting. Mummified fetuses were found after the 43rd day of the outbreak. The epidemic curve was suggestive of a point source exposure, which is consistent with the hypothesis that Neospora can be spread by a definitive host.
McAllister
M M
MM
California Veterinary Diagnostic Laboratory System, Tulare 93274, USA.
Huffman
E M
EM
Hietala
S K
SK
Conrad
P A
PA
Anderson
M L
ML
Salman
M D
MD
D000034:Abortion, Veterinary / Q000453:epidemiology / Q000469:parasitology*; D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood; D002140:California / Q000453:epidemiology; D002417:Cattle; D002418:Cattle Diseases; D003048:Coccidiosis / Q000196:embryology / Q000453:epidemiology / Q000662:veterinary*; D015331:Cohort Studies; D004196:Disease Outbreaks; D005260:Female; D005333:Fetus / Q000469:parasitology; D015994:Incidence; D018688:Neospora; D011247:Pregnancy; D015597:Pregnancy Complications, Parasitic / Q000453:epidemiology / Q000662:veterinary*
D000913:Antibodies, Protozoan