Antimicrobial Susceptibility of Coagulase-Negative Staphylococci Isolated from Bovine Mastitis in Argentina

Gentilini, E.; Denamiel, G.; Betancor, A.; Rebuelto, M.; Fermepin, Marcelo Rodríguez; Torres, Ramón A.

doi:10.3168/jds.s0022-0302(02)74267-7

Cited by 106 publications

(101 citation statements)

References 27 publications

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“…A somatic cell count exceeding 200 000 in 1 ml of milk and positive bacteriological cultures of milk without general symptoms were considered to be indicators of subclinical mastitis. Macroscopic changes in milk and/or local changes within the mammary gland as well as general symptoms with increased somatic cell count > 200 000/ml milk indicated clinical mastitis (De Vliegher et al 2003, Gentilini et al 2002, Moon et al 2007.…”

Section: Methodsmentioning

confidence: 99%

Haemolytic and proteolytic activity of coagulase-negative staphylococci isolated from mastitis cows

Bochniarz¹,

Wawron²

2012

Polish Journal of Veterinary Sciences

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The aim of the present study was to assess the haemolytic and proteolytic activity of coagulase-negative staphylococci (CNS) isolated from cows with mastitis. The study was conducted on 100 CNS strains: S. xylosus (n=28), S.chromogenes (n=26), S.haemolyticus (n=25), S. sciuri (n=14), S. warneri (n=4), S.hominis (n=2), S.saprophyticus (n=1); 22 CNS were isolated from cows with clinical mastitis and 78 from those with subclinical mastitis. The CNS studied showed the ability to produce only α-haemolysin and belonged to one strain -S. haemolyticus (21.0% of isolated CNS strains). Haemolysin-positive CNS were responsible for both clinical and subclinical mastitis (22.7% and 20.5%, respectively). The ability to produce protease was found in 31.0% of CNS belonging to two strains: S. chromogenes and S. sciuri. Protease-positive CNS were the etiological factor of both clinical and subclinical mastitis (31.8% and 30.8%, respectively). All S. xylosus, S. warneri, S. hominis, and S. saprophyticus strains were found protease-negative and haemolysin-negative, irrespective of whether they caused clinical or subclinical mastitis in cows.

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Section: Methodsmentioning

confidence: 99%

Haemolytic and proteolytic activity of coagulase-negative staphylococci isolated from mastitis cows

Bochniarz¹,

Wawron²

2012

Polish Journal of Veterinary Sciences

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“…Recentemente, os SCN têm apresentado grande relevância como agentes patogênicos responsáveis por perdas econômicas substanciais aos produtores de leite (Gentilini 2002). Este fato torna-se ainda mais grave quando essas bactérias apresentam resistência a vários antibióticos disponíveis para o tratamento da mastite.…”

Section: Quadro 2 Perfil De Sensibilidade (S) Sensibilidade Intermeunclassified

Perfil de sensibilidade microbiana in vitro de linhagens de Staphylococcus spp. isoladas de vacas com mastite subclínica

et al. 2009

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Objetivou-se com este estudo avaliar a sensibilidade antimicrobiana in vitro de 291 isolados de Staphylococcus spp. recuperados de amostras de leite de vacas com mastite subclínica, em 15 propriedades rurais localizadas na Região Metropolitana do Recife (A), Agreste (B) e Zona da Mata (C) do estado de Pernambuco. Dos 291 isolados, 170(58,4%) foram classificados como Staphylococcus coagulase negativa (SCN), 84(28,9%) como Staphylococcus aureus e 37(12,7%) como Staphylococcus coagulase positiva (SCP). Para o estudo do perfil de sensibilidade a antimicrobianos empregou-se a técnica de difusão em discos, foram avaliadas 16 drogas antimicrobianas utilizadas no tratamento das mastites. O antibiótico que apresentou melhor eficácia in vitro foi a associação entre neomicina + bacitracina + tetraciclina com percentuais de 98,4%, 99,3%, 89,7% para as regiões A, B e C, respectivamente. O antibiótico menos eficaz foi a ampicilina que apresentou 56,5% de resistência para as amostras da região A, 72,8% para a região B e 71,8% na região C. Os resultados obtidos mostram a necessidade da realização periódica de testes de sensibilidade in vitro, pois existem variações no perfil de sensibilidade e resistência que podem comprometer o tratamento do animal bem como os programas de controle da mastite bovina causada pelo Staphylococcus spp.

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“…Antibiotic treatment of mastitis leads to significant increase in milk quantity and quality, lower somatic cell count and is likely associated with a reduction in prevalence of clinical mastitis among herds, which is economically beneficial (Oliver et al, 2003). Bacterial identification and susceptibility tests are important for selecting the appropriate antimicrobial agent affecting certain diseases (Gentilini et al, 2002). Examples of recent studies that conducted such tests are Murti and Kumar (2011) and Tirumalai and Prakash (2012).…”

Section: Introductionmentioning

confidence: 99%

THE EFFECT OF SEVERAL ANTIBIOTICS ON <i>LACTOCOCCUS GARVIEAE</i> ISOLATED FROM JORDANIAN DAIRY PRODUCTS

Alrabadi¹

2012

American Journal of Agricultural and Biological Sciences

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This study investigated the antibiotic resistance profile of the L. garvieae isolated strains from Jordanian dairy products. Disk diffusion method was used. In particular, different antibiotics were tested against L. garvieae; the antibiotic disks were Trimethoprim (5 µg), Clindamycin (2 µg), Nitrofurantoin (300 µg), Erythromycin (15 µg), Ampicillin (15 µg), Trimethoprim/Sulfamethoxazole (1.25/23.75 µg Polymyxin B (300U) and Tetracycline (30 µg). The results indicated high and statistically significant effects of Trimethoprim, Nitrofurantoin and Trimethoprim/Sulfamthoxazole on L. garvieae. Trimethoprim had the greatest antimicrobial effect on L. garvieae strains. All of the strains were sensitive to this antibiotic. Trimethoprim showed 20 mm inhibition zone in some strains. On the other hand, there were no antibiotic effects of Clindamycin and Polymyxin B on L. garvieae. Slight and statistically insignificant effects were found of other tested antibiotics. The study recommended using Trimethoprim antibiotic against L. garvieae because it inhibited its growths in all isolated cultures.

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Antimicrobial Susceptibility of Coagulase-Negative Staphylococci Isolated from Bovine Mastitis in Argentina

Cited by 106 publications

References 27 publications

Haemolytic and proteolytic activity of coagulase-negative staphylococci isolated from mastitis cows

Haemolytic and proteolytic activity of coagulase-negative staphylococci isolated from mastitis cows

Perfil de sensibilidade microbiana in vitro de linhagens de Staphylococcus spp. isoladas de vacas com mastite subclínica

THE EFFECT OF SEVERAL ANTIBIOTICS ON <i>LACTOCOCCUS GARVIEAE</i> ISOLATED FROM JORDANIAN DAIRY PRODUCTS

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