No description available.

Diss. (sammanfattning) Stockholm : Karol. inst., 2006. / Härtill 5 uppsatser.

Thesis (MMedVet (Med) (Small Animals))--University of Pretoria, 2007. / Includes bibliographical references.

Thesis (PhD. (Veterinary Science))--University of Pretoria, 2008. / Includes bibliographical references. Also available in print format.

Thesis (M.A.) -- Central Connecticut State University, 2006. / Thesis advisor: Kathy Martin. "... in partial fulfillment of the requirements for the degree of Master of Arts in Biomolecular Sciences." Includes bibliographical references (leaves 99-103). Also available via the World Wide Web.

Thesis (MMedVet (Medicine))--University of Pretoria, 2006. / Includes bibliographical references.

Master of Science / Food Science Institute / Thomas J. Herald / Food recalls and incidence of foodborne disease are on the rise throughout the world. Food products are recalled in the United States almost daily, and typically a large quantity of food is affected. Pathogenic microorganisms are readily invading the food supply and traditional methods and use of antimicrobials are not performing as well as in the past. The microorganisms that prompt the recalls cause symptoms ranging from mild gastroenteritis to death. All humans eat food, therefore all humans have the potential to be exposed to pathogens in food at some point in their life. There is a need for new, more effective antimicrobials for use on food products in order to ensure that consumers have access to a safe food supply. Any new treatments for prevention of pathogenic growth in the food supply should be researched. Phage preparations used as antimicrobials on food products are a novel idea. Phages are advantageous over traditional antimicrobials such as antibiotics, pesticides, and sanitizers in numerous ways. This report presents the history of phage and phage therapy in humans, advantages and disadvantages of phage use over traditional methods, current phage preparations available or under research, and approvals and objections of phage use in the food supply.

Center rot of onion, caused by Pantoea ananatis, was first described in the USA, in 1997. P. ananatis is seed-borne in onions and it was suggested that it was introduced into the USA on infected seed lots from South Africa. Center rot has not been observed in South Africa and it was essential to determine if P. ananatis is present in local onion seed. Colonies resembling those of P. ananatis were isolated from four South African seed lots on PA 20, a new semi-selective medium. Pathogenicity tests demonstrated that the South African and America strains induced the same symptoms on onion. Phenotypic and genotypic analyses identified the strains from seed as P. ananatis. In 2004/2005, an unreported disease of maize, brown stalk rot, was observed on commercial fields in South Africa. The representative strains induced disease symptoms similar to those observed in the field. The phenotypic and genotyping tests showed that the strains belonged to the genus Pantoea and separated them into two groups. The first group was identified as P. ananatis. The F-AFLP genomic fingerprints generated by the second group of strains, were distinctly different from those generated by known Pantoea species. To resolve the taxonomic position of Pantoea isolated from onion and maize, sixty-seven strains were subjected to a polyphasic study. The methods used included phenotypic characterisation, genomic fingerprinting, 16S rRNA gene sequence analysis and DNA-DNA hybridisation. The results revealed that the strains belong to three different species within the genus Pantoea: P. ananatis, P. vagens and a novel species, Pantoea allii sp. nov. / Thesis (PhD (Microbiology))--University of Pretoria, 2009. / Microbiology and Plant Pathology / unrestricted

The occurrence of tick-borne pathogens in dogs on communal land in Botswana was studied using Reverse Line Blot (RLB). Eighty blood samples were collected from dogs that underwent a spay and neuter program in Maun, Botswana. These were sent to the Department of Veterinary Tropical Diseases, University of Pretoria, and were stored at the Molecular Laboratory. DNA was extracted from the samples followed by the Polymerase Chain Reaction (PCR) and the RLB. Six samples were found to be positive for Ehrlichia canis. Two of the samples were positive for a concurrent infection of E. canis and Ehrlichia ruminantium. There was one sample that was positive for the non-pathogenic Ehrlichia sp. Omatjenne. Although six samples were positive for the Babesia/Theileria catch-all probe, none hybridised with any of the species-specific probes. Copyright / Dissertation (MSc)--University of Pretoria, 2011. / Veterinary Tropical Diseases / unrestricted

Two studies were conducted to evaluate the presence of tick-borne bacterial agents in Amblyomma americanum, lone star tick (LST), and various wildlife in Mississippi. Adult LSTs had DNA evidence of Ehrlichia chaffeensis (3.7%), E. ewingii (6.3%), and Borrelia lonestari (2.6%), while both larval (24.3%) and adult (43.5%) LSTs were positive for a Rickettsia spp. by polymerase chain reaction (PCR). White-tailed deer (WTD) were the only wildlife PCR positive for E. chaffeensis (18.8%), B. lonestari (3.1%), and Anaplasma phagocytophilum (3.1%). In addition, WTD had the highest seroprevalence to B. lonestari (19.3%) and E. chaffeensis (43.9%) antigens while raccoons had the highest seroprevalence to spotted fever group rickettsiae (R. parkeri antigen) (73.7%). These studies demonstrate evidence of potentially zoonotic tick-borne agents in LSTs and wildlife in Mississippi underscoring the importance of monitoring these agents for human and animal health.