Cross-protective immunity induced by Babesia bovis clones with antigenically unrelated variable merozoite surface antigens. 1994

V Shkap, and E Pipano, and T F McElwain, and U Herzberg, and Y Krigel, and L Fish, and G H Palmer
Department of Parasitology, Kimron Veterinary Institute, Bet Dagan, Israel.

Babesia bovis merozoite surface antigen 1 (MSA-1) induces antibodies capable of neutralizing merozoites in vitro. Both MSA-1 and the co-expressed MSA-2 are encoded by a polymorphic multigene family and are antigenically variant among strains isolated from widely separated geographic regions. In this study, cross-protective immunity between two B. bovis clones, Mexico Mo-7 and Israel-C, that have antigenically unrelated MSA-1 and MSA-2 surface proteins was assessed. Cattle immunized by infection with either clone were significantly protected against challenge with the uncloned Israel Bbv strain. This indicates that epitopes capable of inducing partial protection are shared among different strains and that immunity is not solely dependent upon MSA-1 or MSA-2. However, cattle immunized with the Israel-C clone, derived from the Israel Bbv strain, were significantly better protected against BbV challenge than were cattle immunized with the Mexico Mo-7 clone bearing antigenically unrelated MSA-1 and MSA-2. The significant difference in immunity induced by the homologous strain versus an antigenically variant strain indicates that epitope variation among strains is relevant to immunity against babesiosis.

UI MeSH Term Description Entries
D007109 Immunity Nonsusceptibility to the invasive or pathogenic effects of foreign microorganisms or to the toxic effect of antigenic substances. Immune Process,Immune Response,Immune Processes,Immune Responses,Process, Immune,Response, Immune
D007114 Immunization Deliberate stimulation of the host's immune response. ACTIVE IMMUNIZATION involves administration of ANTIGENS or IMMUNOLOGIC ADJUVANTS. PASSIVE IMMUNIZATION involves administration of IMMUNE SERA or LYMPHOCYTES or their extracts (e.g., transfer factor, immune RNA) or transplantation of immunocompetent cell producing tissue (thymus or bone marrow). Immunologic Stimulation,Immunostimulation,Sensitization, Immunologic,Variolation,Immunologic Sensitization,Immunological Stimulation,Sensitization, Immunological,Stimulation, Immunologic,Immunizations,Immunological Sensitization,Immunological Sensitizations,Immunological Stimulations,Sensitizations, Immunological,Stimulation, Immunological,Stimulations, Immunological,Variolations
D002417 Cattle Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor. Beef Cow,Bos grunniens,Bos indicus,Bos indicus Cattle,Bos taurus,Cow,Cow, Domestic,Dairy Cow,Holstein Cow,Indicine Cattle,Taurine Cattle,Taurus Cattle,Yak,Zebu,Beef Cows,Bos indicus Cattles,Cattle, Bos indicus,Cattle, Indicine,Cattle, Taurine,Cattle, Taurus,Cattles, Bos indicus,Cattles, Indicine,Cattles, Taurine,Cattles, Taurus,Cow, Beef,Cow, Dairy,Cow, Holstein,Cows,Dairy Cows,Domestic Cow,Domestic Cows,Indicine Cattles,Taurine Cattles,Taurus Cattles,Yaks,Zebus
D002418 Cattle Diseases Diseases of domestic cattle of the genus Bos. It includes diseases of cows, yaks, and zebus. Bovine Diseases,Bovine Disease,Cattle Disease,Disease, Bovine,Disease, Cattle,Diseases, Bovine,Diseases, Cattle
D002999 Clone Cells A group of genetically identical cells all descended from a single common ancestral cell by mitosis in eukaryotes or by binary fission in prokaryotes. Clone cells also include populations of recombinant DNA molecules all carrying the same inserted sequence. (From King & Stansfield, Dictionary of Genetics, 4th ed) Clones,Cell, Clone,Cells, Clone,Clone,Clone Cell
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000913 Antibodies, Protozoan Immunoglobulins produced in a response to PROTOZOAN ANTIGENS. Protozoan Antibodies
D000953 Antigens, Protozoan Any part or derivative of any protozoan that elicits immunity; malaria (Plasmodium) and trypanosome antigens are presently the most frequently encountered. Protozoan Antigens
D000954 Antigens, Surface Antigens on surfaces of cells, including infectious or foreign cells or viruses. They are usually protein-containing groups on cell membranes or walls and may be isolated. Cell Surface Antigens,Surface Antigens,Surface Markers, Immunological,Cell Surface Antigen,Immunologic Surface Markers,Markers, Immunological Surface,Surface Antigen,Surface Markers, Immunologic,Antigen, Cell Surface,Antigen, Surface,Antigens, Cell Surface,Immunological Surface Markers,Markers, Immunologic Surface,Surface Antigen, Cell,Surface Antigens, Cell
D001404 Babesiosis A group of tick-borne diseases of mammals including ZOONOSES in humans. They are caused by protozoa of the genus BABESIA, which parasitize erythrocytes, producing hemolysis. In the U.S., the organism's natural host is mice and transmission is by the deer tick IXODES SCAPULARIS. Babesiasis,Piroplasmosis,Babesia Infection,Babesia Parasite Infection,Human Babesiosis,Babesia Infections,Babesia Parasite Infections,Babesiases,Babesioses,Babesioses, Human,Babesiosis, Human,Human Babesioses,Infection, Babesia,Infection, Babesia Parasite,Infections, Babesia,Infections, Babesia Parasite,Piroplasmoses

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