Risk factors for dairy cows mastitis in Algeria, antibiotic resistance and molecular typing of the causative Staphylococcus aureus

Adoption of a rational management in dairy farms would improve the milk quality and farmers’ income. In the current study, we aimed to describe bovine mastitis in 32 dairy herds, identify the main cow- and herd-associated risk factors, and analyze both epidemiological along with molecular characteri...

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Veröffentlicht in:Veterinary research communications 2024-10, Vol.48 (5), p.3007-3018
Hauptverfasser: Akkou, Madjid, Titouche, Yacine, Bentayeb, Lamia, Bes, Michèle, Laurent, Frédéric, Ramdani-Bouguessa, Nadjia
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container_title Veterinary research communications
container_volume 48
creator Akkou, Madjid
Titouche, Yacine
Bentayeb, Lamia
Bes, Michèle
Laurent, Frédéric
Ramdani-Bouguessa, Nadjia
description Adoption of a rational management in dairy farms would improve the milk quality and farmers’ income. In the current study, we aimed to describe bovine mastitis in 32 dairy herds, identify the main cow- and herd-associated risk factors, and analyze both epidemiological along with molecular characteristics of Staphylococcus aureus infecting udders. Based on Californian Mastitis Test and clinical examination, the prevalence of mastitis in cows was 52.25% (116/222), of which 6.3% was clinical mastitis and 45.94% was subclinical mastitis. Overall, 218 (24.54%) quarters suffered from mastitis, whose 29.81% (65/218) infected with S. aureus . Mastitis was lowest in mid-lactation with OR = 0.371 with 95% confidence interval (CI) of 0.141–0.976, and in cows separated from their calves (OR = 0.164, 95% CI 0.056–0.477) than suckler cows. Similar results were obtained from S. aureus related mastitis. To assess the genetic lineages of S. aureus isolates, we determined clonal complexes (CC) using DNA microarray hybridization profiles and performed spa typing. The strains were assigned to nine clonal complexes, and 19 spa types; with CC97 (44.77%), and CC22 (40.29%) were the most predominant lineages and t223 (40.29%), t7136 (10.44%), t359 (8.95%) and t267 (5.97%) were the most common spa types. A total of 88.05% ( n  = 59) isolates were resistant to at least one tested antibiotic while only 4.47% were multi-drug resistant strains. Higher rates of resistance were observed for penicillin (86.5%) and tetracycline (14.9%) respectively. Our results show the need for adoption of feasible mastitis program with special emphasis on sub-clinical mastitis and associated risk factors.
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In the current study, we aimed to describe bovine mastitis in 32 dairy herds, identify the main cow- and herd-associated risk factors, and analyze both epidemiological along with molecular characteristics of Staphylococcus aureus infecting udders. Based on Californian Mastitis Test and clinical examination, the prevalence of mastitis in cows was 52.25% (116/222), of which 6.3% was clinical mastitis and 45.94% was subclinical mastitis. Overall, 218 (24.54%) quarters suffered from mastitis, whose 29.81% (65/218) infected with S. aureus . Mastitis was lowest in mid-lactation with OR = 0.371 with 95% confidence interval (CI) of 0.141–0.976, and in cows separated from their calves (OR = 0.164, 95% CI 0.056–0.477) than suckler cows. Similar results were obtained from S. aureus related mastitis. To assess the genetic lineages of S. aureus isolates, we determined clonal complexes (CC) using DNA microarray hybridization profiles and performed spa typing. 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subjects Algeria
Algeria - epidemiology
Animals
Anti-Bacterial Agents - pharmacology
Antibiotic resistance
Antibiotics
Biomedical and Life Sciences
bovine mastitis
Cattle
clinical examination
confidence interval
Cow's milk
Dairying
DNA microarrays
Drug resistance
Drug Resistance, Bacterial
Epidemiology
Female
Hybridization
income
Lactation
Life Sciences
Mastitis
Mastitis, Bovine - epidemiology
Mastitis, Bovine - microbiology
milk quality
Molecular Typing - veterinary
Multidrug resistance
multiple drug resistance
Penicillin
penicillins
Prevalence
risk
Risk Factors
Staphylococcal Infections - epidemiology
Staphylococcal Infections - microbiology
Staphylococcal Infections - veterinary
Staphylococcus aureus
Staphylococcus aureus - drug effects
Staphylococcus aureus - genetics
Staphylococcus aureus - isolation & purification
tetracycline
Typing
Veterinary Medicine/Veterinary Science
Zoology
title Risk factors for dairy cows mastitis in Algeria, antibiotic resistance and molecular typing of the causative Staphylococcus aureus
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