| vector competence of 7 rhipicephalid tick stocks in transmitting 2 theileria parva parasite stocks from kenya and zimbabwe. | the competence of 7 different stocks of rhipicephalus appendiculatus and r. zambeziensis to transmit 2 different stocks of theileria parva was compared by feeding nymphae of each tick stock simultaneously on infected cattle and assessing the infections in the salivary glands of the resultant adult ticks. there were significant differences in the patterns of infection of the 2 stocks (t. parva muguga and t. parva boleni) in the different stocks of ticks, and these differences were shown to be rep ... | 1998 | 9651937 |
| age resistance to theileria parva bovis infection in calves. | data collected in the zimbabwean province of mashonaland-west, in the period 1980-1988, showed that mortality in calves owing to theileria parva bovis infection (january disease) was significantly lower in animals younger than 7 months than in older cattle. groups of seven holstein-friesian calves from non-immune dams aged approximately 1, 4, 7, 10 and 13 months were infected with a theileria parva bovis tick-derived stabilate. the dose chosen was lethal for 40% of the calves in the trial. morta ... | 1990 | 2267723 |
| an outbreak of rabies in north-western zimbabwe 1980 to 1983. | the first case of rabies for 25 years was recorded in the chinhoyi veterinary region of north-western zimbabwe in september 1980. an epidemic in jackals (86 per cent of cases) with associated cases in cattle (7 per cent) spread rapidly northwestward through the commercial farming areas. within 18 months the front had moved 180 km from the probable point of entry of the disease. one case was diagnosed a further 30 km to the north-west. following a comparatively quiet period in 1982 a second epide ... | 1988 | 3369062 |