Margaret L. Khaitsa

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Recent studies have identified the novel, host adapted Cryptosporidium bovis and the deer-like genotype in dairy cattle from farms in the United States, China, India and Europe. This novel species and genotype appear to be more prevalent in older, post-weaned dairy cattle than previously thought. However, little information is available on their prevalence(More)
OBJECTIVE To characterize an outbreak of West Nile virus (WNV) infection in horses in North Dakota in 2002, evaluate vaccine effectiveness, and determine horse characteristics and clinical signs associated with infection. DESIGN Retrospective study. ANIMALS 569 horses. PROCEDURE Data were obtained from veterinary laboratory records, and a(More)
OBJECTIVES To evaluate the occurrence, serotypes, and antimicrobial susceptibility of Salmonellae from domestic animals and humans in North Dakota. MATERIALS AND METHODS Salmonellosis data (2000-2005) in humans (n = 286) and animals (n = 258) were extracted from the North Dakota Department of Health (NDDoH) and North Dakota State University Veterinary(More)
OBJECTIVES To investigate occurrence of Salmonella in raw and ready to eat (RTE) turkey from retail outlets, determine factors associated with its occurrence and antimicrobial-resistance patterns. MATERIALS AND METHODS A total of 959 turkey products (raw, n = 345; and RTE, n = 614) were purchased in 3 months from four stores in one city in the midwestern(More)
Mycobacterium avium subspecies paratuberculosis is the causative agent of Johne's disease, a chronic enteritis in ruminants including cattle, sheep, goats, and farmed deer. Recently, this bacterium has received an increasingly wide interest because of a rapidly growing body of scientific evidence which suggests that human infection with this microorganism(More)
West Nile virus (WNV) outbreak in North Dakota in 2002 included over 569 horse cases, clustered mainly in the eastern and northeastern parts of the state. The pattern of occurrence observed suggested existence of specific environmental and ecological factors that increased the risk for infection and illness in those locations. We developed a predictive(More)
Despite many reports on the shedding of Giardia parasites by scouring calves, the role of Giardia as a cause of calf diarrhea is still controversial. To elucidate the role of Giardia duodenalis in calf scours, diagnostic samples from 189 scouring calves were tested by different assays during a 1-year-study period. Giardia antigens were detected in 22/189(More)
OBJECTIVES 1) To characterize and determine genotypic relatedness of Salmonella serovars commonly isolated from domestic animals and humans in North Dakota, and 2) to assess their role in transferring antimicrobial resistance (AMR) to humans. MATERIALS AND METHODS A total of 434 Salmonella isolates obtained from 1) feces of apparently healthy feedlot,(More)
OBJECTIVE To identify herd characteristics and management practices associated with bulk-tank somatic cell counts (BTSCC) in dairy herds in Ohio enrolled in official Dairy Herd Improvement Association (DHIA) programs. SAMPLE POPULATION 186 dairies in Ohio. PROCEDURE All herds in official DHIA programs in 9 counties were asked to participate. Extensive(More)
This study estimated economic impacts associated with the West Nile virus (WNV) outbreak in horses for North Dakota in 2002.The 2002 epidemic in the United States was the largest meningoencephalitis epidemic reported in the Western Hemisphere. Over 15,257 horse cases were reported in 43 states with most cases occurring in central United States. North Dakota(More)