Two experiments to determine the seasonal incidence of nematode parasites of sheep are described. These were based on differential egg counts and a comparison between critical slaughter trials and egg counts. Trichostrongylus, ...

Total and differential worm counts were carried out post mortem on sheep slaughtered at regular intervals at the Grootfontein College of Agriculture, Middelburg, Cape Province. Fourth stage larvae were recovered at every ...

Haemonchus krugeri sp. nov. from the impala (Aepyceros melampus) may be distinguished from the other species of this genus by the absence of barbs on the distal end of the spicules as well as differences in the structure ...

Experiments are reported in which the in vitro pH stability of bluetongue virus as well as the survival of this virus in muscle of mutton and beef carcasses, have been investigated. (a) A marked loss of infectivity occurred ...

Following progesterone pre-treatment a total of 45 anoestrous ewes consisting of equal numbers of Merino, Angora, and Boergoat ewes was treated with gonadotrophin according to three different schedules. Detailed observations ...

Sand tampans cause irritation and losses among cattle in the sand veld areas of the Kalahari and South West Africa. They appear above the ground in response to a stimulus. The nature of this stimulus was investigated in ...

Helminth parasites from two species of hornbills (Bucerotidae) are described. These helminths are: a young trematode of the genus Eumegacetes, which is not specifically identified; a new species of cestode - Raillietina ...