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Laboratory reared Amblyomma hebraeum and Amblyomma variegatum ticks differ in their susceptibility to infection with Cowdria ruminantium

Published online by Cambridge University Press:  15 May 2009

S. M. Mahan ,
T. F. Peter ,
S. M. Semu ,
B. H. Simbi ,
R. A. I. Norval  and
A. F. Barbet
S. M. Mahan
Affiliation:
University of Florida/United States Agency for International Development/South African Development Cooperation, Heartwater Research Project, Box CY 551 Causeway, Harare, Zimbabwe.
T. F. Peter
Affiliation:
University of Florida/United States Agency for International Development/South African Development Cooperation, Heartwater Research Project, Box CY 551 Causeway, Harare, Zimbabwe.
S. M. Semu
Affiliation:
University of Florida/United States Agency for International Development/South African Development Cooperation, Heartwater Research Project, Box CY 551 Causeway, Harare, Zimbabwe.
B. H. Simbi
Affiliation:
University of Florida/United States Agency for International Development/South African Development Cooperation, Heartwater Research Project, Box CY 551 Causeway, Harare, Zimbabwe.
R. A. I. Norval
Affiliation:
Department of Infectious Diseases, University of Florida, Box 110880, Gainesville. Florida 32611-0880, United States of America
A. F. Barbet
Affiliation:
Department of Infectious Diseases, University of Florida, Box 110880, Gainesville. Florida 32611-0880, United States of America
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The susceptibility of laboratory reared Zimbabwean Amblyomma hebraeum and A. variegatum ticks to infection with geographically distinct Cowdria ruminantium strains was investigated by feeding both species simultaneously on individual sheep infected with one of the four strains (Crystal Springs [Zimbabwe], Ball 3 [South Africa]. Gardel [Guadeloupe] and Nigeria [Nigeria]). A. hebraeum ticks demonstrated a high susceptibility to infection with all four C. ruminantium strains. In comparison. A. variegatum were less susceptible to infection with the Crystal Springs and Ball 3 strains (P < 0·001), but showed a similar susceptibility to the Gardel and Nigeria strains. The differences in susceptibility of A. variegatum to infection with the four strains of C. ruminantium correlated with the origin of these strains. The consistently higher susceptibility of A. hebraeum ticks to infection with geographically different C. ruminantium strains may be one explanation for the observation that heartwater is a more serious problem where A. hebraeiun is the vector of the disease.

Type
Research Article
Information
Epidemiology & Infection , Volume 115 , Issue 2 , October 1995 , pp. 345 - 353
Copyright
Copyright © Cambridge University Press 1995

References

1.Burridge, MJ. Heartwater invades the Caribbean. Parasit Today 1985; 1: 1–3.CrossRefGoogle ScholarPubMed
2.Perreau, P, Morel, PC, Barré, N, Durrand, P. Existence de la Cowdriose (heartwater) à Cowdria ruminantium chez les ruminants des Antilles françaises (La Guadeloupe) et des Mascareignes (La Reunion et He Maurice). Rev Elev Med Vet Pays Trop 1980; 33: 21–2.Google Scholar
3.Uilenberg, G. Heartwater (Cowdria ruminantium infection): Current status. Adv Vet Sci Comp Med 1983; 427–80.Google ScholarPubMed
4.Bezuidenhout, JD. Natural transmission of heartwater. Onderstepoort J Vet Res 1987; 54: 349–51.Google ScholarPubMed
5.Norval, RAI. The ticks of Zimbabwe. VII. The Genus Amblyomma. Zimbabwe Vet J 1983; 14: 3–18.Google Scholar
6.Camus, E, Barré, N. The role of Amblyomma variegatum in the transmission of heartwater with special reference to Guadeloupe. In Williams, JC, Kocan, KM, Gibbs, EPJ, eds. Tropical veterinary medicine: current issues and perspectives. New York: Annals New York Academy of Sciences, 1992; 33–41.Google Scholar
7.Asselbergs, M, Jongejan, F, Langa, A, Neves, L, Afonso, S. Antibodies to Cowdria ruminantium in Mozambican goats and cattle detected by immunofluorescence using endothelial cell culture antigen. Trop Anim Hlth Prod 1993; 25: 144–50.CrossRefGoogle ScholarPubMed
8.Norval, RAI, Peter, T, Meltzer, MI. Comparison of the attachment rates of males of the Amblyomma hebraeum and A. variegatum to cattle, sheep and rabbits in the absence of aggregation-attachment pheromone. Exp Appl Acarol 1992; 15: 145–52.CrossRefGoogle Scholar
9.Camus, E, Barré, N. Epidemiology of heartwater in Guadeloupe and in the Caribbean. Onderstepoort J Vet Res 1987; 54: 419–26.Google ScholarPubMed
10.Du Plessis, JL. A method for determining the Cowdria ruminantium infection rate of Amblyomma hebraeum: effects in mice injected with tick homogenates. Onderstepoort J Vet Res 1985; 52: 55–61.Google ScholarPubMed
11.Du Plessis, JL, Malan, L. Problems with the interpretation of epidemiological data in heartwater: A study on 23 farms. Onderstepoort J Vet Res 1987; 54: 427–33.Google Scholar
12.Norval, RAI, Andrew, HR, Yunker, CE. Infection rates with Cowdria ruminantium of nymphs and adults of the bont tick Amblyomma hebraeum collected in the field in Zimbabwe. Vet Parasitol 1990; 36: 277–83.CrossRefGoogle ScholarPubMed
13.Byrom, B, Yunker, CE. Improved culture conditions for Cowdria ruminantium (Rickettsiales), the agent of heartwater disease of domestic ruminants. Cytotechnology 1990; 4: 285–90.CrossRefGoogle ScholarPubMed
14.Haig, DA. Note on the use of the white mouse for transport of strains of heartwater. S Afr Vet Med Assoc 1952; 23: 167–70.Google Scholar
15.Uilenberg, G, Camus, E, Barré, N. A strain of C. ruminantium isolated in Guadeloupe (French West Indies). Rev Elev Med Vet Pays Trop 1985; 38: 34–42.Google Scholar
16.Van Winkelhoff, AJ, Uilenberg, G. Heartwater: cross-immunity studies with strains of Cowdria ruminantium isolated in West and South Africa. Trop Anim Hlth Prod 1981; 13: 160–4.CrossRefGoogle ScholarPubMed
17.Synge, BA. Brain biopsy for the diagnosis of heartwater. Trop Anim Hlth Prod 1978; 10: 45–8.CrossRefGoogle ScholarPubMed
18.Purchase, HS. A simple and rapid method for demonstrating Rickettsia ruminantium (Cowdry 1925), in heartwater brains. Vet Rec 1945; 57: 413–4.Google Scholar
19.Sambrook, J, Fritsch, EF, Maniatis, T. Molecular cloning: a laboratory manual. Cold Spring Harbor, N.Y: Cold Spring Harbor Laboratory. 1989.Google Scholar
20.Waghela, SD, Rurangirwa, FR, Mahan, SM et al. , A cloned DNA probe identifies Cowdria ruminantium in Amblyomma variegatum ticks. J Clin Microbiol 1991; 26: 2571–7.CrossRefGoogle Scholar
21.Yunker, CE, Mahan, SM, Waghela, SD.McGuire, TC, Rurangirwa, FR, Barbet, AF, Wassink, LA. Detection of Cowdria ruminantium by means of a DNA probe pCS20 in infected Bont ticks. Amblyomma hebraeum the major vector of heartwater in Southern Africa. Epidemiol Infect 1993; 110: 95–104.CrossRefGoogle ScholarPubMed
22.Mahan, SM, Waghela, SD, McGuire, TC, Rurangirwa, FR, Wassink, LA, Barbet, AF. A cloned DNA probe for Cowdria ruminantium hybridizes with eight heartwater strains and detects infected sheep. J Clin Microbiol 1992; 30: 981–6.CrossRefGoogle ScholarPubMed
23.Walker, JB, Olwage, A. The tick vectors of Cowdria ruminantium (Ixodoidea. Ixodidae. (Genus Amblyomma) and their distribution. Onderstepoort J Vet Res 1987; 54: 353–79.Google ScholarPubMed
24.Young, AS, Ochanda, H, Perry, BD et al. . The biology of the transmission dynamics of Theileria panva. Proceedings of the 7th International Symposium on Veterinary Epidemiology and Economics, Nairobi, Kenya. The Kenya Vet 1994; 18: 470–2.Google Scholar
25.Moloo, SK. A comparison of susceptibility of two allopatric populations of Glossina pallidipes for stock of Trypanosoma congolense. Med Vet Entomol 1993; 7: 369–72.CrossRefGoogle ScholarPubMed
26.Eriks, IE, Stiller, D, Palmer, GH. Impact of persistent Anaplasma marginate rickettsemia on tick infection and transmission. J Clin Microbiol 1993; 31: 2091–6.CrossRefGoogle Scholar
27.Byrom, B, Yunker, CE, Donovan, PL, Smith, GE. In vitro isolation of Cowdria ruminantium from plasma of infected ruminants. Vet Microbiol 1991; 26: 263–8.CrossRefGoogle ScholarPubMed