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Abstract

Results from various studies by the author are summarized under the headings: susceptibility to tick infestation, and tick control studies. The main conclusions were: N'Dama cattle acquire an enhanced degree of resistance to these ticks following initial exposure. Lesions on zebu-type Ghana Sanga ...

Author(s)
Morrow, A. N.; Koney, E. B. M.; Heron, I. D.
Citation
Tropical Animal Health and Production, 1996, 28, 2, suppl., pp 44S-49S
Abstract

A close association was found between infestation with A. variegatum and the occurrence of dermatophilosis (Dermatophilus congolensis) on 5 herds of 75-160 cattle on the coastal Plains of Ghana in 1990-91. Animals belonging to breeds traditionally regarded as more susceptible to the disease...

Author(s)
Koney, E. B. M.; Morrow, A. N.; Heron, I. D.
Citation
Tropical Animal Health and Production, 1996, 28, 2, suppl., pp 18S-25S
Abstract

The association between the occurrence of Amblyomma variegatum ticks and streptothricosis was studied on the Caribbean island of Antigua. The prevalence of streptothricosis was higher on animals infested with ticks compared to that of animals not infested. There was a steady increase in the...

Author(s)
Morrow, A. N.; Heron, I. D.; Walker, A. R.; Robinson, J. L.
Citation
Journal of Veterinary Medicine. Series B, 1989, 36, 4, pp 241-249
Abstract

The proliferative response of lymphocytes from tick-infested zebu type (Ghana Sanga (West African Shorthorn × zebu)), N'Dama and Friesian cattle and acaricide (Bayticol Pour-on [flumethrin]) -treated zebu types and Friesians in concanavalin A (Con A) stimulated cultures was monitored regularly for...

Author(s)
Koney, E. B. M.; Morrow, A. N.; Heron, I.; Ambrose, N. C.; Scott, G. R.
Citation
Veterinary Parasitology, 1994, 55, 3, pp 245-256
Abstract

The seasonal abundance of adult ticks on cattle and their association with dermatophilosis were investigated in 5 herds of 75-160 cattle of all ages on the coastal plains of Ghana over a 26-month period. Amblyomma, Boophilus, Rhipicephalus and Hyalomma were identified, A. variegatum being the...

Author(s)
Honey, E. B. M.; Walker, A. R.; Heron, I. D.; Morrow, A. N.; Ambrose, N. C.
Citation
Revue d'Élevage et de Médecine Vétérinaire des Pays Tropicaux, 1994, 47, 2, pp 163-167
Abstract

The effectiveness of 3 tick control regimes on the occurrence of Amblyomma variegatum and dermatophilosis on cattle on the coastal plains of Ghana were compared. Animals at one kraal were sprayed with amitraz (Triatix) at predilection feeding sites of ticks every second week using a high...

Author(s)
Morrow, A. N.; Arnott, J. L.; Heron, I. D.; Koney, E. B. M.; Walker, A. R.
Citation
Revue d'Élevage et de Médecine Vétérinaire des Pays Tropicaux, 1993, 46, 1/2, pp 317-322
Abstract

The distribution of lesions on cattle affected with streptothricosis (caused by Dermatophilus congolensis) was studied in Antigua. Lesions were not confined to feeding sites of Amblyomma variegatum and in many cases appeared to have started on the dorsal surface. Flies of the genus Haematobia were...

Author(s)
Hadrill, D. J.; Morrow, A. N.; Heron, I. D.
Citation
Newsletter, Centre for Tropical Veterinary Medicine, University of Edinburgh, 1987, No. 45, pp 16
Abstract

The association between the occurrence of Amblyomma variegatum and that of a severe form of cattle streptothricosis (caused by Dermatophilus congolensis) was studied on Antigua during the early part of the wet season and compared with results obtained from St. Lucia. Although the prevalence of mild ...

Author(s)
Morrow, A. N.; Heron, I. D.
Citation
Newsletter, Centre for Tropical Veterinary Medicine, University of Edinburgh, 1987, No. 45, pp 16
Abstract

In studies of 927 cattle, 44 horses, 184 sheep and 64 goats in all areas of St. Lucia in the wet season of 1987 for the presence of exudative dermatitis, scab material was collected to confirm Dermatophilus congolensis infection. 39 cattle, 7 sheep, 6 goats and 5 horses were positive. The disease...

Author(s)
Morrow, A. N.; Compton, E. A. E.
Citation
Journal of Veterinary Medicine. Series B, 1991, 38, 8, pp 635-638

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