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ABSTRACT: In Huila Province of Angola, 3864 ticks were collected during a parasitological survey carried out in the rainy season from October 1990 to April 1991. The samples were collected from cattle gathered for the annual vaccination campaign against contagious bovine pleuropneumonia, anthrax and blackleg in 18 veterinary stations of six municipalities. After tick classification, the following proportions of ticks were obtained: Rhipicephalus evertsi mimeticus (27.1%), Amblyomma pomposum (26.4%), Boophilus decoloratus (19.0%), Rhipicephalus zambesiensis (9.4%), Rhipicephalus duttoni (8.3%), Hyalomma marginatum rufipes (3.8%), Hyalomma truncatum (3.0%), Rhipicephalus punctatus (2.5%) and Ixodes cavipalpus, Rhipicephalus lunulatus, Rhipicephalus turanicus, Rhipicephalus evertsi evertsi, Rhipicephalus simus, each less than 1%. These ticks are well known in southern Africa as vectors of diseases caused by protozoa and rickettsiae (babesiosis, theileriosis, anaplasmosis and cowdriosis). Control programmes against ticks and tick-borne diseases should be based on critical studies regarding costs/risks/benefits in relation to socio-economic and ecological frameworks.
Veterinary Parasitology 03/1994; 51(3-4):333-6. · 2.58 Impact Factor
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A F Gomes
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ABSTRACT: Amongst the Amblyomma species presently known to be capable of transmitting Cowdria ruminantium six have been recorded in Angola. A. pomposum is the most important and widely distributed. Of secondary importance are A. variegatum, which prevails in Cabinda and Moxico provinces, and A. astrion which occurs in the littoral and transition strips and on Camabatela plateau. A. sparsum and A. tholloni which are specific parasites of wild hosts are considered accidental vectors. A. hebraeum was introduced recently in the territory but its distribution is unknown at present. For each of these species the hosts, distribution, ecology and seasonal abundance are listed.
Revue d'élevage et de médecine vétérinaire des pays tropicaux 02/1993; 46(1-2):237-43.
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ABSTRACT: An epidemiological survey on bovine babesiosis was carried out in South-Western Angola. Both parasitological and serological methods were used. Use of the packed cell volume (PCV) technique increased up to five times the detection of infected cattle as compared with the thin blood smear method. Although the PCV method provided better information on the parasitological diagnosis, the indirect fluorescent antibody test represents a better approach for the evaluation of endemic situations. Results obtained by this method proved that in most herds and farms investigated there was an endemic stability. The disease did not present any problem in the traditional sector. Cases of babesiosis were only reported in some commercial farms where the control of ticks was inadequate and responsible for endemic instability.
Revue d'élevage et de médecine vétérinaire des pays tropicaux 02/1991; 44(4):429-35.
