L. Ribeiro

Persistent infection with Brucella abortus biotype 1 in a cow.

S. Herr, F. Chaparro, L. Ribeiro, 1990, Journal of the South African Veterinary Association.

A serological comparison of complement fixation reactions using Brucella abortus and B. melitensis antigens in B. abortus infected cattle.

S. Herr, J. Lawrence, O. L. Brett, 1991, The Onderstepoort journal of veterinary research.

The isolation and serology of Brucella melitensis in a flock of goats in central RSA.

F. H. van der Vyver, S. Herr, F. Chaparro, 1990, The Onderstepoort journal of veterinary research.

The persistence of serological reactions following heifer vaccination with Brucella abortus strain 19 on brucellosis-free farms.

S. Herr, W. Ehret, F. Chaparro, 1990, Journal of the South African Veterinary Association.

The use of filter paper discs impregnated with thionin acetate, basic fuchsin and thionin blue in the identification of Brucella species.

S. Herr, L. Ribeiro, 1990, The Onderstepoort journal of veterinary research.

An efficient medium for the isolation of Trichomonas foetus.

L. Ribeiro, 1990, Onderstepoort Journal of Veterinary Research.

A reduction in the duration of infection with Tritrichomonas foetus following vaccination in heifers and the failure to demonstrate a curative effect in infected bulls.

E. Claassen, J. Myburgh, S. Herr, 1991, The Onderstepoort journal of veterinary research.