Bovine mastitis and its association with selected risk factors in smallholder dairy farms in and around Bahir Dar, Ethiopia

Abstract

Three hundred fifty one (195 local zebu and 156 Holstein x local zebu crosses) lactating cows of smallholder farms in Bahir Dar 'milk shed' were examined from September 2003 to March 2004 to determine mastitis prevalence, isolate pathogens and identify the role of some potential risk factors. Clinical prevalence was determined through examination of abnormalities of milk, udder or cow. California mastitis test (CMT) was used for determination of subclinical mastitis prevalence. Clinical prevalence at cow level was 3.9% in crossbreds and none in local zebu breeds. Subclinical mastitis at cow level based on CMT was high (34.4%) in crossbreds compared to indigenous zebu (17.9%) (p < 0.05). Quarter subclinical prevalence based on CMT was 17.9% and 4.9% in crossbreds and local zebu, respectively. The pathogens isolated from mastitic milk (CMT positive milk) were coagulase negative staphylococci (CNS), S. aureus, Str. agalactiae, Str. dysgalactiae, Str. uberis, Micrococcus species, C. bovis, A. pyogens, B. cereus, and S. intermedius. Among these, the most frequent isolates were CNS (50%), S. aureus (19%), Str. agalactiae (8%) and Str. dysgalactiae (7%). Among potential risk factors considered, stage of lactation, parity and breed were found to affect the occurrence of mastitis significantly (p < 0.05).

Isolation, Identification and Antimicrobial Resistance Profile of Staphylococcus aureus and Occurrence of Methicillin Resistant S. aureus Isolated from Mastitic Lactating Cows in and around Assosa Town, Benishangul Gumuz Region, Ethiopia

“…In agreement with [33,27]. The findings of a high prevalence of mastitis in farms with muddy (soil) floors (49.12%) when compared with concrete floor types (25%) shows the occurrence of mastitis is significantly associated with the housing (bedding) type or condition of the farm.…”

Epidemiology and Financial Impact of Bovine Mastitis in an Animal Production and Research Center and Small Holder Dairy Farms in HoroGuduru Wollega Zone, Western Ethiopia

“…In this study clinical mastitis is higher than 6.6% reported by Almaw et al [1] and the 4.9% report by Moges et al [15]. Our results showing 36.36% cow level subclinical mastitis is in agreement with 36.67% of Sebeta Sori et al [12]; 31.0% from Hawassa of the southern region [16] and 40.6% of Batu and its surrounding area [17].…”

“…large towns and in central Ethiopia [1]. There was not any study conducted on bovine mastitis in the present study area.…”

“…However, dairy production is subjected to diseases' of intensification like mastitis and reproductive disorders [1]. Mastitis is inflammation of the parenchyma of the mammary gland regardless of the causative agent [2][3][4].…”

Prevalence and Antimicrobial Resistance Assessment of Subclinical Mastitis in Milk Samples From Selected Dairy Farms

“…Subclinical mastitis is the most common form of mastitis among dairy cattle (Salvador et al, 2012), with a prevalence of about 40-50 times more than the clinical mastitis (Roy et al, 2009;Mekibib et al, 2010); which attracts for prompt attention in the dairy industry. However, the prevalence was reported to be influenced by factors such as breed, anatomical abnormality of the udder, stage of lactation, parity and management practice (Almaw et al, 2008).…”