Affiliation:
1. Swedish University of Agricultural Science Faculty of Veterinary Medicine and Animal Science: Sveriges Lantbruksuniversitet Veterinarmedicin och husdjursvetenskap
2. University of Rwanda - Nyagatare Campus
Abstract
Abstract
A cross-sectional study on 156 smallholder dairy farms in Rwanda was carried out to assess the association between farm management practices and milk yield and quality. A pre-tested questionnaire was used to collect data on cow characteristics and farm management practices. Milk yield was recorded at household level, milk composition was monitored using a Lactoscan device (Milk Analyzer). Somatic cell count (SCC) was determined using a DeLaval cell counter (DCC). A Delvotest SP-NT kit was used to determine antibiotic residues in raw milk. Most dairy cows were kept in zero-grazing system (84.6%) and most farmers had no experience of dairy production (78.2%). Mean daily milk yield was 3.9 L/cow and was associated with type of breed, milking frequency, stage of lactation and parity. Mean milk content of protein, fat, lactose and solid non-fat, and density were normal and showed no association with different management practices. Based on SCC analyses, 65.8% of the milk samples were graded as acceptable for delivery to a milk collection centre (MCC) and 12.9% of the samples tested positive for antibiotic residues. These findings suggest low milk yields on smallholder farms in Rwanda that are attributable to breed and mastitis, among other factors. The results also indicate possible non-compliance with withdrawal periods, resulting in antibiotic residues in milk, which has public health implications for consumers. Routine testing at MCC for both SCC and antibiotic residues is important for quality control.
Publisher
Research Square Platform LLC
Reference50 articles.
1. Residues of antibiotics in milk: persistence and quality interference;Alves JF,2020
2. Risk of Exposure to Marketed Milk with Antimicrobial Drug Residues in Ghana;Aning KG;The Open Food Science Journal,2007
3. Effects of nutrients supply on milk yield, composition, and enteric methane gas emissions from smallholder dairy farms in Rwanda;Ayabagabo JdeD;Journal of Animal Science and Veterinary Medicine,2021
4. Use of antibiotics as feed additives: A burning question;Chattopadhyay MK;Frontiers in Microbiology,2014
5. Chowdhury, S., Ghosh, S., Aleem, M.A., Parveen, S., Islam, A., Rashid, M., Akhtar, Z., and Chowdhury, F., 2021. Antibiotic Usage and Resistance in Food Animal Production: What Have We Learned from Bangladesh ? 1–14.