| microbiological investigation of meat wholesale premises and beef carcases in johannesburg. | microbiological surveillance by swabbing meat wholesaler premises revealed ineffective cleaning and build-up of bacteria. proper cleaning, sanitation and handling resulted in a vast improvement during 1975-77. beef samples from the neck of carcases in the wholesale trade were investigated by microbiological methods. excessive total bacterial counts were obtained from numerous carcases. most carcases carried coliform organisms. roughly 90% of carcases were contaminated with e. coli i; counts exce ... | 1977 | 202708 |
| the incidence and nature of prohibited animal tissues in boerewors ("country-style" sausage). | sixty boerewors ("country-style" sausage) samples bought from butchers in pretoria were examined microscopically. it was found that 97% of these samples contained animal tissues that are not permitted in boerewors under the regulations of the foodstuffs, cosmetics and disinfectants act (act no. 54 of 1972). these regulations confine permitted tissues to fat and the musculature of cattle, sheep and pigs. details of the tissues revealed in the survey are provided, and the implications of their pre ... | 1977 | 562415 |
| the incidence and sources of penicillin in milk supplied to the city of johannesburg. | the incidence of penicillin in bulk milk supplies to the city has varied from 1,2% to 2,6% over the past five years, and 3,2% of 366 pasteurised milk samples examined in 1975 were found to contain penicillin. investigation of the sources revealed numerous instances of producers, milkers and veterinarians who had not acted responsibly in regard to the marketing of milk from treated cows. details are provided. the legal and professional obligations of the veterinarian are emphasized. reference is ... | 1976 | 994138 |
| digital dermatitis: report of an outbreak. | an outbreak of digital dermatitis in a dairy herd in the gauteng province of south africa is described in which 72% of the lactating herd was affected. many of the affected cows showed a severe lameness and a drop in milk production. other complications included heel horn erosion, under-running of heel horn and boxy claws. the diagnosis was made on the typical clinical appearance of the condition and the presence of spirochaetes on histopathological sections from biopsy material. the condition r ... | 1995 | 8596191 |
| the distribution of pasteurella haemolytica serotypes among cattle, sheep, and goats in south africa and their association with diseases. | over an 8-year period (september 1986 to march 1994), a total of 497 organ specimens from sheep and goats and 96 from cattle, were received for their isolation of pasteurella haemolytica. they were collected in seven geographical areas in south africa (as it existed before the april 1994 elections). these areas include the eastern cape, transvaal (new name: gauteng), nambia, orange free state (new name: free state), natal (new name: kwazulu-natal), western cape and the northern cape. this invest ... | 1995 | 8668319 |
| serological survey to determine the prevalence of bovine leukaemia virus antibodies in dairy cattle on selected farms in the gauteng and mpumalanga provinces. | cattle from a farm where enzootic bovine leukosis had been diagnosed were tested to determine the prevalence of bovine leukaemia virus antibodies. farmers who had bought cattle from this farm were identified and their herds also tested. of 381 adult dairy cattle tested, 14 animals reacted positively (3.67%). cattle (n = 81) from 3 selected herds, not associated with the affected farm were also bled and 7 animals reacted positively (8.64%). | 1996 | 9120859 |
| culicoides (diptera:ceratopogonidae) associated with livestock in the onderstepoort area, gauteng, south africa as determined by light-trap collections. | in 54 light-trap collections made at 28 sites in the onderstepoort area a total of 178,941 culicoides midges of 35 species was collected in march 1988; the survey was repeated at 26 sites in september and yielded 19,518 culicoides of 24 species. the number of culicoides species collected totalled 38. c,imicola was the most abundant species at 27 of the 28 sites sampled, and accounted for 88% and 67% of all midges collected in the two months respectively. this study not only confirms that c. imic ... | 1996 | 9173363 |
| phage types of salmonella enterica serovar enteritidis isolated in south africa from 1991-1995. | a total of 615 strains of salmonella enterica serovar enteritidis (se), received from 1991-1995 at the onderstepoort veterinary institute (ovi), were phage typed. most se isolates (54,7%) originated from poultry followed by humans (28,5 %) and poultry eggs (9,6 %). phage type 34 was the most prevalent (40,5 %) of all isolates, followed by phage type 4 (33,8 %). other phage types identified were 1, lb, 4a, 7, 7a, 9a, 14, 24, 24var and 35 (in total 2,4% of isolates). most isolates of se were recei ... | 2000 | 11028749 |
| microbiological hazard identification and exposure assessment of street food vending in johannesburg, south africa. | one hundred and thirty-two samples of beef, chicken, salad and gravy were collected from two street vendors over eleven replicate surveys to assess microbiological safety and quality. for each food type samples were collected during preparation and holding. dish water was also collected and food preparation surfaces swabbed during preparation and display. standard methods were used to determine aerobic plate counts, enterobacteriaceae counts, coliform counts and spore counts. six hundred and sev ... | 2000 | 11078164 |
| prevalence of the dog nematode spirocerca lupi in populations of its intermediate dung beetle host in the tshwane (pretoria) metropole, south africa. | spirocerca lupi (spirurida: spirocercidae) is a cosmopolitan parasite, principally of domestic dogs and dung beetles are its main intermediate hosts. in south africa there has recently been growing concern over the upsurge of reported cases of clinical spirocercosis in dogs, while little is known or understood about the dynamics of the host-parasite associations between dung beetles and this nematode. we determined and compared the prevalence of infection in dung beetles between rural, urban and ... | 2008 | 19294987 |
| william horner andrews (1887-1953)- first professor of physiology at onderstepoort. | w h andrews qualified as a veterinarian in london in 1908 and was recruited soon after, in 1909, by sir arnold theiler to join the staff of the newly established veterinary laboratory at onderstepoort. after initial studies on the treatment of trypanosomosis and on snake venoms he was deployed by theiler in 1911 to start research on lamsiekte (botulism)at a field station on the farm kaffraria near christiana, where he met and married his wife doris. after a stint as captain in the sa veterinary ... | 2011 | 21826830 |
| crimean-congo hemorrhagic fever in south africa. | crimean-congo hemorrhagic fever virus was isolated for the first time in south africa in february 1981, from the blood of a 13-year-old boy who died in johannesburg after attending a camp in a nature reserve in the western transvaal. virus was isolated from 21/120 pools of questing ticks from the nature reserve, the infected species being hyalomma marginatum rufipes and h. truncatum. virus was also isolated from 4/38 pools of partially engorged ticks and other ectoparasites collected off hosts, ... | 1983 | 6418019 |
| bovine parafilariosis in southern africa: a preliminary report. | a total of 32,042 cattle, slaughtered at the pretoria, johannesburg and durban abattoirs, was examined for parafilariosis and as many animals as possible were traced to the farms from which they originated. the disease is most prevalent in the bushveld areas of the northern transvaal. the most important factors limiting its distribution are the annual rainfall and the duration of the frost period. mention is made of some aspects of the economic loss involved. the effect of routine anthelmintic t ... | 1978 | 750962 |
| the effect of the dye-marking of mastitis remedies on the incidence of antibiotic residues in pretoria's market milk supplies. | a 1973 survey on the incidence of inhibitory substances (mostly antiobiotic residues) in market milk supplied in pretoria, on 3 195 herd milk samples, 65 tanker milk samples and 252 samples of pasteurised milk using the disc assay procedure with bacillus stearothermophilus c 953 as test organism, revealed inhibitory substances equivalent to 0,005 iu penicillin/ml in 7.8% of the herd samples, 29,2% of the tanker samples and in 38.5% of the samples of pasteurised milk. in 38.9% of the positive her ... | 1979 | 551198 |