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Abstract

To assess transmissibility of attenuated Babesia bigemina (BIS) and Babesia bovis (BOR) strains by Rhipicephalus microplus (R. microplus), 12 steers from a tick-free area were divided in four groups and infested at different intervals with R. microplus larvae. One animal from each group was...

Author(s)
Rojas Ramírez, E. E.; Mosqueda Gualito, J. J.; Álvarez Martínez, J. A.; Hernández Ortíz, R.; Ramos Aragón, J. A.; Rojas Martínez, C.; Vega y Murguia, C. A.; Figueroa Millán, J. V.
Publisher
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), Mexico City, Mexico
Citation
Revista Mexicana de Ciencias Pecuarias, 2011, 2, 3, pp 267-281
Abstract

Attenuated vaccines of B. bovis, B. bigemina and A. marginale were tested in 291 Holstein heifers divided into 5 groups of 6 (groups 1-5) and one group of 261 (group 6). Group 1 was vaccinated with B. bovis, group 2 with B. bigemina, group 3 with both these species, group 4 with A. marginale and...

Author(s)
Kessler, R. H.; Sacco, A. M. S.; Madruga, C. R.; Müller, M.; Miguita, M.
Citation
Revista Brasileira de Parasitologia Veterinária, 1998, 7, 1, pp 1-5
Abstract

Monoclonal antibodies were capable of detecting T. annulata schizonts, and an epitope on the surface of infected cells. The schizont antigen disappeared during serial passage of the parasite, in parallel with attenuation. The polymorphism of restriction fragments changes during serial passage. Loss ...

Author(s)
Sutherland, I. A.; Shiels, B.; Jackson, L. A.; Brown, D.; Brown, C. G. D.; Tait, A.; Preston, P. M.
Publisher
CIRAD, Maisons-Alfort, France
Citation
Resistance or tolerance of animals to disease and veterinary epidemiology and diagnostic methods., 1993, pp 45-47
Abstract

An attenuated strain prepared by rapid passage in splenectomized calves, at a dose of 107 parasites to five 6-month-old cattle, protected them 8 months later against i.v. challenge with a heterologous strain, as shown by the milder course of infection than in controls and absence of mortality or...

Author(s)
Alonso, M.; Blandino, T.; Baudín, C.
Citation
Revista de Salud Animal, 1991, 13, 1, pp 25-29
Abstract

The virulence and immunogenicity for cattle of a Mexican field isolate of B. bigemina maintained by passage in calves was compared with those of another Mexican isolate that had been propagated continuously in vitro and one subculture and one clone of the latter isolate; these two had been...

Author(s)
Hernández Ortíz, R.; Alvarez Martínez, J. A.; Buening, G. M.; Cantó Alarcón, G. J.; Monroy Basillo, M.; Ramos Aragón, J. A.; Vega y Murguía, C. A.
Citation
Técnica Pecuaria en México, 1990, 28, 2, pp 51-61
Abstract

A suspension of oocysts from veal calves with clinical coccidiosis contained 4 species of Eimeria, with E. zuernii accounting for 94%. In another similar suspension E. zuernii accounted for 95.5% of oocysts. Both suspensions were exposed to 250 Gy of gamma rays from radiocobalt. Oral administration ...

Author(s)
Mielke, D.; Rudnick, J.; Hiepe, T.
Citation
Monatshefte für Veterinärmedizin, 1993, 48, 8, pp 425-429
Abstract

Nuclear techniques have been used in a variety of ways to study East Coast fever of cattle caused by T. parva. Macroschizonts, piroplasms and sporozoites have been radiolabelled by using different nucleic acid precursors, particularly 3H-hypoxanthine and 3H-thymidine. These studies have helped to...

Author(s)
Irvin, A. D.
Publisher
International Atomic Energy Agency, Vienna, Austria
Citation
Nuclear techniques in tropical animal diseases and nutritional disorders. Proceedings of a consultants' meeting of the joint FAO/IAEA division of isotope and radiation application of atomic energy for food and agricultural development, Vienna, 13-16 June, 1983., 1984, pp 189-202
Abstract

Macroschizonts of the IVRI strain of T. annulata were maintained in cultures of infected lymphocytes for 40 passages. Virulence was lost, but immunogenicity remained and the strain was used as a vaccine in 20 calves, all of which withstood challenge with no ill effects.

Author(s)
Subramanian, G.; Ray, D.; Naithani, R. C.
Citation
Indian Journal of Animal Sciences, 1986, 56, 2, pp 174-182
Abstract

A virulent strain of B. bovis (KB) was adapted to grow in erythrocyte culture in the presence of equine and bovine sera. 4 splenectomized calves inoculated with the adapted strain (429) developed haematological signs of infection and a low grade fever, but remained free of CNS signs and recovered....

Author(s)
Yunker, C. E.; Kuttler, K. L.; Johnson, L. W.
Citation
Veterinary Parasitology, 1987, 24, 1-2, pp 7-13
Abstract

With the objective of developing local strains attenuated according to the Australian method, 16 rapid passages of B. bovis in splenectomized calves and four slow passages of B. bigemina in intact calves were made. A preliminary test of the virulence and antigenicity of strains in two-year-old...

Author(s)
Kessler, R. H.; Sacco, A. M. S.; Jesus, E. F. de; Madruga, C. R.
Citation
Pesquisa Agropecuária Brasileira, 1987, 22, 11/12, pp 1225-1230

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