Mice were very successfully immunized against intraperitoneal infection with virulent Salmonella typhimurium by fluid and lyophilized formalin inactivated vaccines prepared from a smooth strain of the microorganism. A ...

The diagnostic accuracy of conventional methods for the diagnosis of subclinical mastitis, such as the direct microscopic count (DMC) and electronic cell count (ECC) either used alone or in combination with bacteriological ...

A simple, sensitive and rapid spectrophotometric method for the determination of protein concentration in the presence of RNA contaminants is described. Only small spectral differences exist between RNAs from different ...

The immunizing potency of a live vaccine prepared from a strain of Besnoitia besnoiti isolated from blue wildebeest and stored frozen as a low passage stabilate was studied in adult male rabbits. The vaccine consisted of ...

Experiments are reported which show that the addition of 4,0% polyethylene glycol (6 000 MW) to liquid cultures of Clostridium welchii Type D , Pasteurella and Vibrio fetus (venerialis) will effectively sediment the bacteria. ...

The number of haemolytic plaque forming cells (PFCs) in the spleens of normal mice could not be increased by the injection of nucleic acids. However, when nucleic acids were injected into mice simultaneously with a priming ...

An outbreak of bilharzia (Schistosoma mattheei) infestation involving about 100 oxen on the farm Otthilie near Tolwe in northern Transvaal is described. Infestation of the cattle appears to have occurred per os from a ...

Boophilus microplus larvae infected with Babesia bovis were removed from a susceptible ox approximately 72 hours after attachment, triturated and stored in liquid nitrogen refrigerator with dimethyl sulphoxide as ...