Prevalence of clinical and subclinical mastitis and quality of milk on smallholder dairy farms in Tanzania
| Autor: | Robinson H. Mdegela, Torleiv Løken, R. Ryoba, Esron D. Karimuribo, Olav Reksen, NA Urio, Ecj Phiri, E. J. Mtengeti |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Quality Control
Veterinary medicine Prevalence Food Contamination Tanzania Milking Animal science medicine antimicrobial residues Animals Udder bacteria Mastitis Bovine Dairy cattle Subclinical infection lcsh:Veterinary medicine intramammary infection General Veterinary business.industry CMT food and beverages udder health Hygiene General Medicine medicine.disease Drug Residues Mastitis Anti-Bacterial Agents Dairying medicine.anatomical_structure Cross-Sectional Studies Milk smallholder dairy farms Herd lcsh:SF600-1100 Cattle Female fungi business California mastitis test |
| Zdroj: | Journal of the South African Veterinary Association, Volume: 80, Issue: 3, Pages: 163-168, Published: 2009 Europe PubMed Central Scopus-Elsevier Journal of the South African Veterinary Association, Vol 80, Iss 3, Pp 163-168 (2009) |
| Popis: | A cross sectional study was conducted during October and November 2006 on 69 smallholder dairy farms with lactating cows in Mvomero and Njombe districts Tanzania, to determine the prevalence of mastitis and to assess the milk quality on the study farms. Clinical mastitis was investigated using clinical changes of udder and milk at animal level. Cow-side California Mastitis Test (CMT) and microbiological cultures were used to assess subclinical mastitis at quarter level. Milk quality was determined on bulk milk samples at herd level using alcohol and acidity tests, butter fat content, total solids, ash content as well as Delvotest® for antimicrobial residues. Overall prevalence of clinical mastitis at herd level in both districts was 21.7 % (n = 69). Based on CMT, prevalence of subclinical mastitis at animal level was 51.6 % (n = 91). Prevalence of bacterial isolates at animal level was 35.2 % (n = 91) while for fungal it was 16.7 % (n = 90). Based on CMT results, prevalence of subclinical mastitis at quarter level was 30 % (n = 353), while for bacteria and fungi it was 16 % and 6 % respectively. Contamination of milk with antimicrobial residues was 4.5 % (n =67). The milk quality parameters for most of the milk samples were within acceptable levels. Findings in this study have demonstrated high prevalence of subclinical mastitis that may contribute to low productivity of dairy cattle in both districts. About 20 % of CMT subclinical cases had no involvement of microbial pathogens that suggested the need for minimal interventions with antimicrobial agents. These findings call for use of udder disinfectants and improved milking hygiene as intervention strategies to control mastitis on the smallholder dairy farms in Tanzania. |
| Databáze: | OpenAIRE |
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