Effects of nutrition on degree of anaemia and liveweight changes in N'Dama cattle infected with trypanosomes

Agyemang, K.; Dwinger, R.H.; Touray, B. N.; Jeannin, Pascale; Fofana, Diakridia; Grieve, A. S.

doi:10.1016/0301-6226(90)90054-a

Cited by 39 publications

(10 citation statements)

References 2 publications

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“…Conversely, the Romanovs exhibited a serious dulling of the senses and lack of reaction once anaemization was achieved; this necessitated support treatments with rehydrating solutions to allow them to overcome their state of anergy . These results strongly support the hypothesis that, beyond the environmental factors such as stress, nutrition and other conditions, which in general facilitate infections (Agyemang et al, 1990;Bennison et al, 1998;Oppliger et al, 1998) and which are supposed to be particularly relevant in the case of non-native breeds, genetic predisposition plays a major role also in the pathogenesis of TBD.…”

Section: Contrastssupporting

confidence: 75%

Tolerance to Tick-Borne Diseases in Sheep: Highlights of a Twenty-Year Experience in a Mediterranean Environment

Pieragostini¹,

Ciani²,

Rubino³

et al. 2011

Health Management - Different Approaches and Solutions

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Section: Contrastssupporting

confidence: 75%

Tolerance to Tick-Borne Diseases in Sheep: Highlights of a Twenty-Year Experience in a Mediterranean Environment

Pieragostini¹,

Ciani²,

Rubino³

et al. 2011

Health Management - Different Approaches and Solutions

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“…At the same time, in the majority of studies, the trypanosomes used for the challenge infection were not fully characterized in terms of antigenicity and virulence, and probably consisted of a mixture of different serodemes. Other factors which might have affected the outcome and interpretation of results included lack of age matching within and between test groups (Roberts & Gray 1972, 1973, the effect of different environmental or management situations, particularly where one breed was moved to join another to permit comparative studies (Murray et al 1979a(Murray et al , b, 1981, and finally, the nutritional and physiological status of the test animals, factors known to affect the stability of trypanotolerance (Agyemang et al 1990, Murray et a/. 1981) were not defined or not stated.…”

Section: Introductionmentioning

confidence: 99%

Susceptibility of N'Dama and Boran cattle to sequential challenges with tsetse‐transmitted clones of Trypanosoma congolense

Paling

Moloo

Scott

et al. 1991

Parasite Immunology

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The susceptibility of N'Dama cattle (Bos taurus) to four consecutive infections with different tsetse-transmitted clones of Trypanosoma congolense was compared with that of Borans (Bos indicus). All animals were aged 13 months at the start of the study and had been born and raised free from trypanosomiasis under the same management and nutritional conditions, thereby limiting environmental factors that could have influenced susceptibility. While cattle of both breeds were equally susceptible to the establishment of trypanosome infections, the N'Damas exhibited superior resistance. Despite infection with virulent parasites, the N'Damas gained weight at the same rate as uninfected control animals, they did not develop anaemia to the extent that trypanocidal drug treatment was required, and all made a spontaneous recovery to normal haematological values within two to four months. In contrast, all the Borans needed treatment during the course of the four infections because of severe anaemia and showed markedly reduced liveweight gains. These clinical differences in the N'Damas were associated with two repeatable characteristics, namely, the ability to control parasitaemia and to 'resist' anaemia, processes that did not appear to be linked. Also in contrast to the Borans, the N'Damas were able to mount accelerated haemopoietic responses, resulting in the reduced severity of anaemia following a primary infection. These findings pose the question as to whether the ability to control parasitaemia and to 'resist' anaemia could be used as criteria for identifying resistant or trypanotolerant cattle.

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“…dans les troupeaux encadrés que non-encadrés par le Plta ; -au début de la saison sèche dans les deux zones où les enquêtes ont été effectuées pendant deux saisons (Kara et Mango), aussi bien dans les troupeaux encadrés que non-encadrés par le Plta (tableau X). (3,4,22). Ceux-ci constituent des facteurs codé-terminants dans l'anémie trypanosomienne.…”

Section: Hématocriteunclassified

Parasitoses des veaux dans la région septentrionale du Togo

Bouka¹,

Batawui²,

Napala³

et al. 2001

Rev. Elev. Med. Vet. Pays Trop.

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L’examen parasitologique de 738 bovins de types zébu, taurin et de leurscroisements (zébu x taurin) du nord du Togo, d’âge compris entre 1 et12 mois, a permis de mettre en évidence plusieurs agents pathogènes et vecteursappartenant à différents groupes de parasites (piroplasmes, trypanosomes,nématodes, tiques et glossines) et d’évaluer leur fréquence relative(Babesia : 16,9 p. 100 de prévalence ; Trypanosoma : 11,0 p. 100 ; stronglesdigestifs : 46,4 p. 100). Les actions pathogènes de ces parasites sur leurs hôtesont été évaluées par la mesure du taux d’hématocrite (29,3 p. 100 enmoyenne) qui s’est élevé en fin de saison sèche (31,1 p. 100) et dans leszones d’application d’insecticides épicutanés sur le bétail (29,6 p. 100) où lesanimaux étaient suivis dans le cadre du Projet régional de lutte contre la trypanosomoseanimale (Plta). Au plan épidémiologique, le parasitisme desbovins a varié en fonction des zones éco-géographiques, des saisons, du suivides animaux par le Plta, des races, du type d’élevage et de l’âge des animaux.Il a pu être confirmé que la trypanosomose et la strongylose étaient des fléauximportants, en revanche Babesia sp. s’est révélée comme un hémoparasitedont l’impact sur la santé des veaux avait été sous-estimé.

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Effects of nutrition on degree of anaemia and liveweight changes in N'Dama cattle infected with trypanosomes

Cited by 39 publications

References 2 publications

Tolerance to Tick-Borne Diseases in Sheep: Highlights of a Twenty-Year Experience in a Mediterranean Environment

Tolerance to Tick-Borne Diseases in Sheep: Highlights of a Twenty-Year Experience in a Mediterranean Environment

Susceptibility of N'Dama and Boran cattle to sequential challenges with tsetse‐transmitted clones of Trypanosoma congolense

Parasitoses des veaux dans la région septentrionale du Togo

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