Abstract
Initial infestations of Amblyomma variegatum larvae and nymphs, on rabbits and sheep respectively, produced inflammatory reactions in the host's skin; repeated infestations resulted in an increase in development of delayed type hypersensitive reactions. Dermatophilus congolensis cocci were applied in titrated doses to hosts at sites of inflammatory or hypersensitive reactions to ticks, and to control hosts with no exposure to ticks. We assessed the resulting infections for three weeks and found no significant difference between the infections on the three groups. We conclude that the local effects of the feeding of immature stages of this tick do not influence the pathogenesis of dermatophilosis.
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References
Bida S.A. and Dennis S.M., 1976. Dermatophilosis in Northern Nigeria. The Veterinary Bulletin, 46(7): 471–478.
Brown S.J., Worms M.J. and Askenase P.W., 1983. Cutaneous basophil-associated resistance to ectoparasites(ticks) IV. Differences in blood basophil kinetics in hosts parasitized by ixodid and argasid ticks. The American Journal of Tropical Medicine and Hygiene, 32(4): 897–902.
Brown S.J., Barker R.W. and Askenase P.W., 1984. Bovine resistance to Amblyomma americanum ticks: An acquired immune response characterized by cutaneous basophil infiltrates. Veterinary Parasitology, 16: 147–165.
Burridge M.J., Barré N., Birnic E.F., Camus E. and Uilenberg G. 1984. Epidemiological studies on heartwater in the Caribbean, with observations on tick-associated bovine dermatophilosis. Proceedings of the 13th World Congress. Diseases of cattle, Durban, 1: 542–546.
Davis D. and Philpott M., 1980. Experimental chronic dermatophilosis. Proceedings of the Royal Society of Edinburgh, 79B: 47–53.
Hadrill D.J., Boid R., Jones T.W. and Bell-Sakyi L., 1990. bovine babesiosis on Nevis-implications for tick control. The Veterinary Record, 126: 403–404.
Latif A.A., Maina J.N., Dhadialla T.S. and Nokoe S., 1990. Histological reactions to bites of Amblyomma variegatum and Rhipicephalus appendiculatus (Acari: Ixodidae) fed simultaneously on naive or sensitized rabbits. Journal of Medical Entomology, 27: 316–323.
Latif A.A., Pynyua D.K., Nokoe S. and Capstick P.B., 1991a. Tick infestations on Zebu cattle in western Kenya: individual host variation. Journal of Medical Entomology, 28(1): 114–121.
Latif A.A., Punyua D.K., Capstick P.B., Nokoe S., Walker A.R. and Fletcher J.D., 1991b. Histopathology of attachment sites of Amblyomma variegatum and Rhipicephalus appendiculatus on Zebu cattle of varying resistance to the ticks. Veterinary Parasitology, 38: 205–213.
Lloyd D.H., 1984. Immunology of dermatophilosis: Recent developments and prospects for control. Preventive Veterinary Medicine, 2: 93–102.
Macadam I., 1962. Bovine streptothricosis: Production of lesions by the bites of the tick Amblyomma variegatum. The Veterinary Record. 74(23): 643–646.
Macadam I., 1964. Observations on the effects of flies and humidity on the natural lesions of streptothricosis. The Veterinary Record, 76(7): 194–198.
Macadam I., 1970. Some observations on bovine cutancous streptothricosis in Northern Nigeria. Tropical Animal Health and Production. 2: 131–138.
Martinez, D., Barré, N., Mari, B. and Vidalenc, T., 1992. Studies of the role of Amblyomma variegatum in the transmission of Dermatophilus congolensis. In: Fivaz, B., Petney, T. and Horak, I. (Eds.). Tick vector biology. Medical and veterinary aspects. Springer-Verlag, pp 87–99.
Morrow A.N., Heron I.D., Walker A.R. and Robinson J.L., 1989. Amblyomma variegatum ticks and the occurrence of bovine streptothricosis in Antigua. Journal of Veterinary Medicine, 36B: 241–249.
Plowright W., 1956. Cutaneous streptothricosis of cattle: I. Introduction and epizootiological features in Nigeria. The Veterinary Record, 68: 350–355.
Roitt I., Brostoff J. and Male D., 1985. Immunology. Gower Medical Publishing, London.
Samui K.L. and Hugh-Jones M.E., 1990. The epidemiology of bovine dermatophilosis in Zambia. Veterianry Research Communications, 14: 267–278.
Stewart G.H., 1972. Dermatophilosis: A skin disease of animals and man. The Veterinary Record, 91(23): 555–561.
Thoen C.O., Jarnagin J.L., Saari D.A., Ortiz B. and HarringtonJr. R., 1980. Pathogenicity and transmission of Dermatophilus congolensis isolated from cattle in Puerto Rico. The Proceedings of the United States Animal Health Association. 84: 232–237.
Thomson R.G., 1978. General veterinary pathology. W.B.Saunders Co., Philadelphia, 444pp.
Turk J.L., 1967. Delayed hypersensitivity. North-Holland Publishing Company, Amsterdam, 248pp.
Uilenberg G., Barré N., Camus E., Burridge M.J. and Garris G.I., 1984. Heartwater in the Caribbean. Preventive Veterinary Medicine, 2: 255–267.
Walker A.R. and Fletcher J.D., 1986. Histological study of the attachment sites of adult Rhipicephalus appendiculatus on rabbits and cattle. International Journal for Parasitology, 16(4): 399–413.
Walker A.R. and Fletcher J.D., 1987. Histology of digestion of Rhipicephalus appendiculatus fed on rabbits and cattle naive and resistant to the tick. International Journal for Parasitology, 17(8): 1393–1411.
Walker A.R. and Lloyd C.M., 1993. Experiments on the relationship between feeding of the tick Amblyomma variegatum (Acari: Ixodidae) and dermatophilosis skin disease in sheep. Journal of Medical Entomology, 30(1): 136–143.
Walker A.R., Fletcher J.D. and Todd L., 1990. Resistance between stages of the tick Rhipicephalus appendiculatus (Acari: Ixodidae). Journal of Medical Entomology, 27(6): 955–961.
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Lloyd, C.M., Walker, A.R. The effect of inflammatory and hypersensitive reactions, in response to the feeding of the tick Amblyomma variegatum, on the progression of experimental dermatophilosis infections. Exp Appl Acarol 17, 345–356 (1993). https://doi.org/10.1007/BF00058597
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DOI: https://doi.org/10.1007/BF00058597