Revue d’élevage et de médecine vétérinaire des pays tropicaux, 1991
Une enquête sur les tiques et les maladies transmises par les tiques dans la province du Nord-Oue... more Une enquête sur les tiques et les maladies transmises par les tiques dans la province du Nord-Ouest du Cameroun, au marché au bétail de Bamenda a été effectuée. Les tiques identifiées ont été Boophilus annulatus (20 %) et B. decoloratus (80 %). Plus de 50 % de ces tiques ont été collectées au cours de la saison sèche. Sur 524 étalements de sang, 47,3 % ont été positifs pour Babesia bovis, 31,1 % pour B. bigemina et 2,2 % pour Anaplasma marginale ; le reste a été négatif, soit 19,4 %.
A study was carried out to investigate the effect of substituting egg yolk in egg-yolk-citrate (E... more A study was carried out to investigate the effect of substituting egg yolk in egg-yolk-citrate (EYC) extenders with extracts from Tomato and Pawpaw fruits as well as Coconut milk and Raffia palm sap on the motility of bull spermatozoa. Semen collected from Holstein Friesian bulls by the artificial vagina was extended with the proportions of egg yolk in egg-yolk-citrate extenders substituted at 25% (75% egg yolk: 25% Substituent), 50% (50% egg yolk:50% Substituent), 75% (25% egg yolk:75% Substituent) and 100% (no egg yolk in extender) and stored under refrigeration conditions (4-8C). Results show that coconut milk (43.4%) and pawpaw juice (41.25%) led to the highest number of progressively motile sperms (P< 0.05) without evidence of difference between them (P > 0.05). They were followed by tomato Juice (40.35%), fresh raffia palm sap (40.40) and Trehalose (34.68%). Substitution of egg yolk at 75% had highest individual motility while total substitution (100%) had the lowest (P&...
Experiments were conducted in nine groups of eight calves to determine the anthelmintic efficacy ... more Experiments were conducted in nine groups of eight calves to determine the anthelmintic efficacy of four indigenous plants; nimely, Terminalia glaucescens, Vernonia amygladina, Solarium aculeastrum, and Khaya anthotheca. Calf fecal samples were collected at days 0, 7, 14, 21, 28, 35, and 42 for fecal egg counts by the McMaster slide technique. Results showed that Solarium aculeastrum, Khaya anthotheca and Verbonia amygladina were efficacious with fecal egg Count reductions of 34.4, 55.8, and 52.4%, respectively, at full doses at day 21 posttreatment.
Revue d’élevage et de médecine vétérinaire des pays tropicaux, 1991
Parmi les espèces de tiques identifiées au Cameroun, huit ont été récoltées sur les bovins à Yaou... more Parmi les espèces de tiques identifiées au Cameroun, huit ont été récoltées sur les bovins à Yaoundé : Amblyomma variegatum, Boophilus annulatus, B. decoloratus, Haemaphysalis aciculifer, Hyalomma nitidum, Rhipicephalus longus, Rh. lunulatus, Rh. sulcatus. Trois espèces, Hm. aciculifer, H. nitidum et Rh. lunulatus, ont été identifiées dans cette région pour la première fois. La pullulation de Rhipicephalus et Hyalomma est observée en saison des pluies. Boophilus abonde toute l'année, avec une concentration maximale à la fin de la grande saison sèche. Enfin, Amblyomma, aussi récolté en grande quantité toute l'année, a une infestation minimale en grande saison des pluies. Un seul individu (une femelle) de l'espèce Hm. aciculifer a été trouvée.
Revue d’élevage et de médecine vétérinaire des pays tropicaux, 2001
Des données sur 275 lactations collectées entre 1981 et 1991 ont été analysées. Le but de ce proj... more Des données sur 275 lactations collectées entre 1981 et 1991 ont été analysées. Le but de ce projet a été d’étudier l’effet de la saison de vêlage, de quelques paramètres zootechniques, de l’intervalle entre vêlages des races Holstein et Jersiaise et de leurs croisements avec le zébu Goudali et le zébu Peul blanc (White Fulani) sur la production laitière dans les hauts plateaux de l’ouest du Cameroun. Les résultats suivants ont été obtenus : - la production laitière des races pures Holstein (n = 73) et Jersiaise (n = 32), sans être comparable à celle de leur pays d’origine, a été significativement supérieure à celle des autres types génétiques étudiés, la Holstein ayant été plus performante que la Jersiaise (2 508 ± 105 l en 291 ± 10 jours, contre 1 818 ± 137 l en 251 ± 13 jours) ; - en croisement de première génération avec le zébu local, la Holstein (n = 52) a produit significativement plus de lait que la Jersiaise (n = 57). La Holstein x le zébu Goudali a produit plus de lait que...
Revue d'élevage et de médecine vétérinaire des pays tropicaux, 1991
Among the tick species identified in Cameroon, eight were found in cattle in Yaoundé: Amblyomma v... more Among the tick species identified in Cameroon, eight were found in cattle in Yaoundé: Amblyomma variegatum, Boophilus annulatus, B. decoloratus, Haemaphysalis aciculifer, Hyalomma nitidum, Rhipicephalus longus, Rh. lunulatus, Rh. sulcatus. Three species, Hm. aciculifer, H. nitidum and Rh. lunulatus, were identified for the first time in Yaoundé. Rhipicephalus and Hyalomma were abundant during the rainy season. Boophilus was abundant throughout the year, with a maximum concentration at the end of the long dry season. Amblyomma, which was encountered in large quantities all year round, had a minimum infestation rate during the long rainy season. Only one female tick of Hm. aciculifer was collected.
Seventy-two cows were selected for an on-farm study on the effect of feed supplementation before ... more Seventy-two cows were selected for an on-farm study on the effect of feed supplementation before calving on milk production, ovarian activity and calf growth of Holstein, indigenous Red Fulani cows and their crosses. Pre-partum feed supplementation was done using cotton seed cake (80%), maize (18%), bone meal (1%) and kitchen salt (1% NaCl). Supplementation levels consisted of a low supplementation fed at 1 kg per animal per day and high supplementation fed at 2 kg per animal per day. In addition, Red Fulani cows received the supplements in two different ways namely a pre-partum supplementation consisting of 1 kg per cow per day and pre- and post-partum supplementation consisting of 1 kg per cow per day before calving and 1 kg per cow per day post-partum up to 30 days after calving. Blood samples were analysed using ELISA Progesterone kits to determine the length of post-partum anoestrus. Results show that pre-partum levels of feeding did not have any effect (P > 0.05) on body co...
Revue d’élevage et de médecine vétérinaire des pays tropicaux, 1999
Des expériences ont été faites sur neuf groupes de huit veaux pour déterminer l’efficacité anthe... more Des expériences ont été faites sur neuf groupes de huit veaux pour déterminer l’efficacité anthelminthique de quatre plantes indigènes : Terminalia glaucescens, Vernonia amygladina, Solanum aculeastrum et Khaya anthotheca. Des échantillons de fèces de veau ont été récoltés aux jours 0, 7, 14, 21, 28, 35 et 42 pour effectuer la numération des œufs par la technique sur lame de McMaster. Les résultats ont montré que Solanum aculeastrum, Khaya anthotheca and Vernonia amygladina étaient efficaces avec des réductions de I’excrétion des œufs respectivement de 34,4, 55,8, et 52,4 % à doses complètes, 21 jours après le traitement.
A study was carried out to compare the prevalence of Brucella abortus between semi-intensive and ... more A study was carried out to compare the prevalence of Brucella abortus between semi-intensive and extensive managed cattle in the North West Region of Cameroon. A total of 689 cattle were tested for Brucella antibodies using the competitive EnzymeLinked Immunosorbent Assay. Overall prevalence of brucellosis was found to be 5.2% (n = 36). There was strong evidence that cows in the extensive system (6.5%; n=32) had a higher infection rate than those in the semi intensive system (2%; n=4; P<0.0001). Bovine overall brucellosis infection rates were higher in the dry season (67%) than the rainy season (33%), (P<0.05). Healthier cattle (78%; P=0.0009), older cattle (64%; P=0.0003) and cows (75%; P=0.0027) were more infected. The prevalence of Brucella in the White Fulani breed was less severe than in other breeds (P=0.0003). Acha had more infected animals than the rest of the region (P<0.0001). The results of this study confirm the endemicity of bovine brucellosis in the North West...
Livestock Research for Rural Development 17 (6) 2005, Guidelines to authors, LRRD News, Citation ... more Livestock Research for Rural Development 17 (6) 2005, Guidelines to authors, LRRD News, Citation of this paper. Milk production in Cameroon: A review. PH Bayemi, MJ Bryant * , BMAO Perera ** , JN Mbanya, D Cavestany *** and EC Webb****. ...
To investigate the effect of replacing cotton seed cake by poultry droppings in the diet of cattl... more To investigate the effect of replacing cotton seed cake by poultry droppings in the diet of cattle, 30 animals were randomly allocated to three dietary treatments in a 2 x 3 factorial design, sex x treatments. The three treatments consisted of replacing 0%, 25% and 50% (T0, T25, T50 respectively) of the crude protein in 500 g of cotton seed cake with an equivalent amount of protein in poultry droppings. The concentrate offered was 615 g in T0, 652.5 g in T25 and 690 g in T50 per animal per day. After an adaptation period of 14 days, followed by 65 days of the experiment, the intake of concentrate and the average daily weight gains were recorded. There was no significant difference (p > 0.05) in the concentrate intake or average daily weight gain of bulls subjected to the three treatments. However, heifers tended to grow more slowly on T50 compared to T0 (p < 0.05), though the difference in their intake of concentrate was not significant (p > 0.05). Although T50 (47% inclusi...
An Economic Opportunity Survey was conducted on dairy farms in the North West Province of Cameroo... more An Economic Opportunity Survey was conducted on dairy farms in the North West Province of Cameroon. Results showed that median (range) number of cows in milk per farm was zero point six (0-4) and six (3-12) in the zero grazing and transhumance systems, respectively. Medians (range) of three (0-24) and four (3-10) litres of milk were sold per farm per day, corresponding to 30% and 60% of milk produced. 24% and 13% of total cattle per herd were milking cows in the zero grazing and transhumance systems respectively. Median milk production per cow on one day was two (0-25) and two (1-3) litres. Median calf production interval was 14.5 (12-25) and. 21.5 (14-29) months. More milk produced per day represented the best economic opportunity in both systems while reduced age at first calving and longer lactation length were the next in both. Wastage of milk through spoilage from poor hygiene and lack of cooling was a major problem. Holstein cows, which were in the zero grazing system, had unexpectedly short lactations. Constraints identified led to the setting up of interventions of training and advice for farmers and of better nutrition.
Revue d’élevage et de médecine vétérinaire des pays tropicaux, 1991
Une enquête sur les tiques et les maladies transmises par les tiques dans la province du Nord-Oue... more Une enquête sur les tiques et les maladies transmises par les tiques dans la province du Nord-Ouest du Cameroun, au marché au bétail de Bamenda a été effectuée. Les tiques identifiées ont été Boophilus annulatus (20 %) et B. decoloratus (80 %). Plus de 50 % de ces tiques ont été collectées au cours de la saison sèche. Sur 524 étalements de sang, 47,3 % ont été positifs pour Babesia bovis, 31,1 % pour B. bigemina et 2,2 % pour Anaplasma marginale ; le reste a été négatif, soit 19,4 %.
A study was carried out to investigate the effect of substituting egg yolk in egg-yolk-citrate (E... more A study was carried out to investigate the effect of substituting egg yolk in egg-yolk-citrate (EYC) extenders with extracts from Tomato and Pawpaw fruits as well as Coconut milk and Raffia palm sap on the motility of bull spermatozoa. Semen collected from Holstein Friesian bulls by the artificial vagina was extended with the proportions of egg yolk in egg-yolk-citrate extenders substituted at 25% (75% egg yolk: 25% Substituent), 50% (50% egg yolk:50% Substituent), 75% (25% egg yolk:75% Substituent) and 100% (no egg yolk in extender) and stored under refrigeration conditions (4-8C). Results show that coconut milk (43.4%) and pawpaw juice (41.25%) led to the highest number of progressively motile sperms (P< 0.05) without evidence of difference between them (P > 0.05). They were followed by tomato Juice (40.35%), fresh raffia palm sap (40.40) and Trehalose (34.68%). Substitution of egg yolk at 75% had highest individual motility while total substitution (100%) had the lowest (P&...
Experiments were conducted in nine groups of eight calves to determine the anthelmintic efficacy ... more Experiments were conducted in nine groups of eight calves to determine the anthelmintic efficacy of four indigenous plants; nimely, Terminalia glaucescens, Vernonia amygladina, Solarium aculeastrum, and Khaya anthotheca. Calf fecal samples were collected at days 0, 7, 14, 21, 28, 35, and 42 for fecal egg counts by the McMaster slide technique. Results showed that Solarium aculeastrum, Khaya anthotheca and Verbonia amygladina were efficacious with fecal egg Count reductions of 34.4, 55.8, and 52.4%, respectively, at full doses at day 21 posttreatment.
Revue d’élevage et de médecine vétérinaire des pays tropicaux, 1991
Parmi les espèces de tiques identifiées au Cameroun, huit ont été récoltées sur les bovins à Yaou... more Parmi les espèces de tiques identifiées au Cameroun, huit ont été récoltées sur les bovins à Yaoundé : Amblyomma variegatum, Boophilus annulatus, B. decoloratus, Haemaphysalis aciculifer, Hyalomma nitidum, Rhipicephalus longus, Rh. lunulatus, Rh. sulcatus. Trois espèces, Hm. aciculifer, H. nitidum et Rh. lunulatus, ont été identifiées dans cette région pour la première fois. La pullulation de Rhipicephalus et Hyalomma est observée en saison des pluies. Boophilus abonde toute l'année, avec une concentration maximale à la fin de la grande saison sèche. Enfin, Amblyomma, aussi récolté en grande quantité toute l'année, a une infestation minimale en grande saison des pluies. Un seul individu (une femelle) de l'espèce Hm. aciculifer a été trouvée.
Revue d’élevage et de médecine vétérinaire des pays tropicaux, 2001
Des données sur 275 lactations collectées entre 1981 et 1991 ont été analysées. Le but de ce proj... more Des données sur 275 lactations collectées entre 1981 et 1991 ont été analysées. Le but de ce projet a été d’étudier l’effet de la saison de vêlage, de quelques paramètres zootechniques, de l’intervalle entre vêlages des races Holstein et Jersiaise et de leurs croisements avec le zébu Goudali et le zébu Peul blanc (White Fulani) sur la production laitière dans les hauts plateaux de l’ouest du Cameroun. Les résultats suivants ont été obtenus : - la production laitière des races pures Holstein (n = 73) et Jersiaise (n = 32), sans être comparable à celle de leur pays d’origine, a été significativement supérieure à celle des autres types génétiques étudiés, la Holstein ayant été plus performante que la Jersiaise (2 508 ± 105 l en 291 ± 10 jours, contre 1 818 ± 137 l en 251 ± 13 jours) ; - en croisement de première génération avec le zébu local, la Holstein (n = 52) a produit significativement plus de lait que la Jersiaise (n = 57). La Holstein x le zébu Goudali a produit plus de lait que...
Revue d'élevage et de médecine vétérinaire des pays tropicaux, 1991
Among the tick species identified in Cameroon, eight were found in cattle in Yaoundé: Amblyomma v... more Among the tick species identified in Cameroon, eight were found in cattle in Yaoundé: Amblyomma variegatum, Boophilus annulatus, B. decoloratus, Haemaphysalis aciculifer, Hyalomma nitidum, Rhipicephalus longus, Rh. lunulatus, Rh. sulcatus. Three species, Hm. aciculifer, H. nitidum and Rh. lunulatus, were identified for the first time in Yaoundé. Rhipicephalus and Hyalomma were abundant during the rainy season. Boophilus was abundant throughout the year, with a maximum concentration at the end of the long dry season. Amblyomma, which was encountered in large quantities all year round, had a minimum infestation rate during the long rainy season. Only one female tick of Hm. aciculifer was collected.
Seventy-two cows were selected for an on-farm study on the effect of feed supplementation before ... more Seventy-two cows were selected for an on-farm study on the effect of feed supplementation before calving on milk production, ovarian activity and calf growth of Holstein, indigenous Red Fulani cows and their crosses. Pre-partum feed supplementation was done using cotton seed cake (80%), maize (18%), bone meal (1%) and kitchen salt (1% NaCl). Supplementation levels consisted of a low supplementation fed at 1 kg per animal per day and high supplementation fed at 2 kg per animal per day. In addition, Red Fulani cows received the supplements in two different ways namely a pre-partum supplementation consisting of 1 kg per cow per day and pre- and post-partum supplementation consisting of 1 kg per cow per day before calving and 1 kg per cow per day post-partum up to 30 days after calving. Blood samples were analysed using ELISA Progesterone kits to determine the length of post-partum anoestrus. Results show that pre-partum levels of feeding did not have any effect (P > 0.05) on body co...
Revue d’élevage et de médecine vétérinaire des pays tropicaux, 1999
Des expériences ont été faites sur neuf groupes de huit veaux pour déterminer l’efficacité anthe... more Des expériences ont été faites sur neuf groupes de huit veaux pour déterminer l’efficacité anthelminthique de quatre plantes indigènes : Terminalia glaucescens, Vernonia amygladina, Solanum aculeastrum et Khaya anthotheca. Des échantillons de fèces de veau ont été récoltés aux jours 0, 7, 14, 21, 28, 35 et 42 pour effectuer la numération des œufs par la technique sur lame de McMaster. Les résultats ont montré que Solanum aculeastrum, Khaya anthotheca and Vernonia amygladina étaient efficaces avec des réductions de I’excrétion des œufs respectivement de 34,4, 55,8, et 52,4 % à doses complètes, 21 jours après le traitement.
A study was carried out to compare the prevalence of Brucella abortus between semi-intensive and ... more A study was carried out to compare the prevalence of Brucella abortus between semi-intensive and extensive managed cattle in the North West Region of Cameroon. A total of 689 cattle were tested for Brucella antibodies using the competitive EnzymeLinked Immunosorbent Assay. Overall prevalence of brucellosis was found to be 5.2% (n = 36). There was strong evidence that cows in the extensive system (6.5%; n=32) had a higher infection rate than those in the semi intensive system (2%; n=4; P<0.0001). Bovine overall brucellosis infection rates were higher in the dry season (67%) than the rainy season (33%), (P<0.05). Healthier cattle (78%; P=0.0009), older cattle (64%; P=0.0003) and cows (75%; P=0.0027) were more infected. The prevalence of Brucella in the White Fulani breed was less severe than in other breeds (P=0.0003). Acha had more infected animals than the rest of the region (P<0.0001). The results of this study confirm the endemicity of bovine brucellosis in the North West...
Livestock Research for Rural Development 17 (6) 2005, Guidelines to authors, LRRD News, Citation ... more Livestock Research for Rural Development 17 (6) 2005, Guidelines to authors, LRRD News, Citation of this paper. Milk production in Cameroon: A review. PH Bayemi, MJ Bryant * , BMAO Perera ** , JN Mbanya, D Cavestany *** and EC Webb****. ...
To investigate the effect of replacing cotton seed cake by poultry droppings in the diet of cattl... more To investigate the effect of replacing cotton seed cake by poultry droppings in the diet of cattle, 30 animals were randomly allocated to three dietary treatments in a 2 x 3 factorial design, sex x treatments. The three treatments consisted of replacing 0%, 25% and 50% (T0, T25, T50 respectively) of the crude protein in 500 g of cotton seed cake with an equivalent amount of protein in poultry droppings. The concentrate offered was 615 g in T0, 652.5 g in T25 and 690 g in T50 per animal per day. After an adaptation period of 14 days, followed by 65 days of the experiment, the intake of concentrate and the average daily weight gains were recorded. There was no significant difference (p > 0.05) in the concentrate intake or average daily weight gain of bulls subjected to the three treatments. However, heifers tended to grow more slowly on T50 compared to T0 (p < 0.05), though the difference in their intake of concentrate was not significant (p > 0.05). Although T50 (47% inclusi...
An Economic Opportunity Survey was conducted on dairy farms in the North West Province of Cameroo... more An Economic Opportunity Survey was conducted on dairy farms in the North West Province of Cameroon. Results showed that median (range) number of cows in milk per farm was zero point six (0-4) and six (3-12) in the zero grazing and transhumance systems, respectively. Medians (range) of three (0-24) and four (3-10) litres of milk were sold per farm per day, corresponding to 30% and 60% of milk produced. 24% and 13% of total cattle per herd were milking cows in the zero grazing and transhumance systems respectively. Median milk production per cow on one day was two (0-25) and two (1-3) litres. Median calf production interval was 14.5 (12-25) and. 21.5 (14-29) months. More milk produced per day represented the best economic opportunity in both systems while reduced age at first calving and longer lactation length were the next in both. Wastage of milk through spoilage from poor hygiene and lack of cooling was a major problem. Holstein cows, which were in the zero grazing system, had unexpectedly short lactations. Constraints identified led to the setting up of interventions of training and advice for farmers and of better nutrition.
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