8 Effects of a Bovine Appeasing Substance Application at Weaning on Temperament and Growth of Bos Indicus Influenced Heifers

The objective of this study was to evaluate the effects of a synthetic analogue of the bovine appeasing pheromone (i.e. bovine appeasing substance; BAS) on growth and temperament of heifers. At weaning (d 0), 30 heifers (Aberdeen Angus ′ Nelore; 8 ± 1 mo) were stratified by body weight (199.8 ± 16 kg) and randomly assigned to receive a single dose of BAS (n = 15; SecureCattle; Nutricorp, Araras, SP, Brazil) or saline (CON; n = 15; saline 0.9% NaCl). Treatments (5 ml) were topically applied to the nuchal skin area of each animal on d0. Body weight was collected on d 0, 6, 15, 45, and 150. Chute score (1 to 5; 1 = calm, no movement; 5 = violent and continuous struggling) and chute entrance and exit score (1 to 3; 1 = slow; 3 = fast) were collected on d 0, 2, 6, 15, 45 and 150. Scores were averaged across 4 trained technicians. Data were analyzed using the MIXED procedure of SAS. Heifers assigned to BAS had greater (P < 0.01) average daily gain (ADG) than heifers assigned to CON treatment from d 6 to 15 (2.35 and 1.88 kg/d ± 0.16) and from d 15 to 45 (1.79 vs. 1.56 kg/d ± 0.08). Heifers assigned to BAS had lower (P < 0.01) chute entrance score on d 6, 15, and 45, and chute exit score on d 2 to 45 (P = 0.05) when compared to heifers assigned to CON. Additionally, heifers assigned to BAS tended (P = 0.08) to have lower chute score, from d 1 to 150 than heifers assigned to CON. The application of BAS at weaning improved heifers ADG, likely due to an improvement in temperament, suggesting that BAS application has calming effects in the beef cattle herd.

Critical Linkages Between Livestock Production, Livestock Trade and Potential Spread of Human African Trypanosomiasis in Uganda: Bioeconomic Herd Modeling and Livestock Trade Analysis

Background: Tsetse-transmitted human African trypanosomiasis (HAT) remains endemic in Uganda. The chronic form caused by Trypanosoma brucei gambiense (gHAT) is found in north-western Uganda, whereas the acute zoonotic form of the disease, caused by T. b. brucei rhodesiense (rHAT), occurs in the eastern region. Cattle is the major reservoir of rHAT in Uganda. These two forms of HAT are likely to converge resulting in a public health disaster. This study examines the intricate and intrinsic links between cattle herd dynamics, livestock trade and potential risk of spread of rHAT northwards.Methods: A bio-economic cattle herd model was developed to simulate herd dynamics at the farm level. Semi-structured interviews (n = 310), focus group discussions (n = 9) and key informant interviews (n = 9) were used to evaluate livestock markets (n = 9) as part of the cattle supply chain analysis. The cattle market data was used for stochastic risk analysis.Results: Cattle trade in eastern and northern Uganda is dominated by sale of draft and adult male cattle as well as exportation of young male cattle. The study found that the need to import draft cattle at the farm level was to cover deficits because of the herd structure, which is mostly geared towards animal traction. The importation and exportation of draft cattle and disposal of old adult male cattle formed the major basis of livestock movement and could result in the spread of rHAT northwards. The risk of rHAT infected cattle being introduced to northern Uganda from the eastern region via cattle trade was found to be high (i.e. probability of 1).Conclusion: Through deterministic and stochastic modelling of cattle herd and cattle trade dynamics, this study identifies critical links between livestock production and trade as well as potential risk of rHAT spread in eastern and northern Uganda. The findings highlight the need for targeted and routine surveillance and control of zoonotic diseases such as rHAT.

Bovine viral diarrhea virus subgenotype 1a in a mummified fetus from a Brazilian dairy cattle herd

We describe the molecular analysis of a wild-type field strain of bovine viral diarrhea virus (BVDV) identified in a mummified fetus from a small Brazilian dairy cattle herd. Nucleic acids extracted from samples of the lung, liver, heart, spleen, and kidney were tested by PCR assays for bovine alphaherpesvirus 1, Neospora caninum, Leptospira spp., Histophilus somni, and Brucella abortus, a nested PCR assay for Mycoplasma bovigenitalium and Ureaplasma diversum, and a RT-PCR assay for BVDV. Amplicons were only obtained in the RT-PCR assay for the partial amplification of the BVDV 5′UTR (288 bp) in kidney and spleen samples and the Npro (438 bp) gene in the kidney sample. Nucleotide sequencing of the amplified products and phylogenetic analyses based on the 2 BVDV genomic regions enabled the BVDV strain to be classified as subgenotype 1a.

Examining Profitability, Viability, and Commercialization Level of Beef Cattle Production among Pastoralists in the Simanjiro District of the Manyara Region, Tanzania

Beef cattle production is significant in wealth creation and improving livelihoods of pastoralists, thus reducing poverty. Nevertheless, most pastoralists continue to live in poverty. This study, thus, sought to assess the profitability, viability, and commercialization level of beef cattle production, as well as the socioeconomic characteristics among pastoralists in the Simanjiro District of the Manyara Region, Tanzania. Cross-sectional data were collected from a sample of 398 pastoralists, using interviews and questionnaires. Descriptive statistics, gross margin (GM), Benefit-Cost Ratio (BCR), and household commercialization index (HCI) methods were used for data analysis. The results revealed that the average age of the pastoralists was 47.7 years with a family size of 10.9. On average, the pastoralists had about 26.4 years of farming experience. Most of the pastoralists (59.3%) had no formal education. Among the pastoralists, only 3% had access to farm credits. Further analysis showed that 98.7% of pastoralists marketed their beef cattle to primary auction markets of which 75.4% of price-setting methods were inappropriate (unprofitable). Among the pastoralists, only 3.8% added value to beef cattle before selling. The average cattle herd size was 119.7 heads, of which 98.4% of cattle herd sizes were local breed cattle. Gross margin and Benefit-Cost Ratio were 136.8 US$ and 2.9, respectively, while household commercialization index was 3.9%. Medication costs constituted 44% of the total variable costs involved in beef cattle production. This study, thus, concluded that beef cattle production is profitable and highly viable to run as a business. However, the commercialization level is low. Furthermore, keeping local breed cattle, inappropriate pricing methods, low-value addition, reliance on primary auction markets, limited access to credits, low level of education, and costs for medications; continue to be critical obstacles to improving profitability, viability, and commercialization level of beef cattle production among pastoralists.

CALVING PATTERNS OF N’DAMA COWS IN ONDO STATE, NIGERIA

The calving patterns, calving and postpartum anoestrus intervals calving percentages and calf mortality of N’Dama cows in a cattle herd belonging to the Federal College of Agricultural, Akure were examined for the 1991 – 1995 calving periods. A total of 128 cows were involved. Calving patterns were irregular from year to year and calving percentage varied from 45 to 65% with a mean of 54.69% while calf mortality was between 6.25 and 11.11% during the period. Calving intervals were 786 ± 44.99 and 712 ± 14.70 days (1993 and 1995). Value for days open were 506 ± 44.99 and 432 ± 14.70 days (1993 and 1995) for the same years. The results of the study are suggestive of inefficient reproduction within the herd.