Phenotypic and genotypic antimicrobial susceptibility pattern of Streptococcus spp. isolated from cases of clinical mastitis in dairy cattle in Poland

Kaczorek, Edyta; Małaczewska, Joanna; Wójcik, Roman; Rękawek, Wojciech; Siwicki, Andrzej K.

doi:10.3168/jds.2017-12660

Cited by 56 publications

(88 citation statements)

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“…Tetracycline resistance was described for 44.7% of isolates in a study evaluating Strep. agalactiae recovered from dairy cattle in Brazil (DUARTE et al, 2004), and similar results (44.7%) were observed in a study performed in Poland (KACZOREK et al, 2017). Rato et al (2013) …”

Section: Descriptive Results and Rapd Typingsupporting

confidence: 86%

“…agalactiae resistant to tetracycline was also reported in other studies (DUARTE et al, 2004;RATO et al, 2013;KACZOREK et al, 2017). Tetracycline resistance was described for 44.7% of isolates in a study evaluating Strep.…”

Section: Descriptive Results and Rapd Typingsupporting

confidence: 78%

“…The minimal β-lactams resistance of Strep. agalactiae isolates found in our study agrees with the results reported by other (GUÉRIN-FAUBLÉE et al, 2002;KACZOREK et al, 2017).…”

Section: Evaluated 60supporting

confidence: 93%

“…Differences in antimicrobial susceptibility between studies, and among different genotypes (or clusters) within studies, seems to be related to genetic mechanisms of resistance. Resistance genes such as lnu(D), emr(A) and emr(B) were associated with antimicrobial resistance to macrolides and lincosamides of isolates recovered from cows with clinical and subclinical mastitis (DUARTE et al, 2004;KACZOREK et al, 2017). Therefore, it is reasonable to infer that isolates belonging to cluster Ib in our study may have genetic determinants associated with resistance to erythromycin.…”

Section: Descriptive Results and Rapd Typingmentioning

confidence: 75%

“…agalactiae strains. Most tetracycline-resistant strains characterized in the study of Kaczorek et al (2017) had at least one of the five resistance genes evaluated in the experiment (tetO, tetL, tetM, tetK and tetS). Another study evaluating the resistance genes among Strep.…”

Section: Evaluated 60mentioning

confidence: 99%

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<b>Etiological and molecular profile of pathogens causing clinical mastitis, and antimicrobial use in dairy herds</b>

Tomazi¹

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Pirassununga 2017Autorizo a reprodução parcial ou total desta obra, para fins acadêmicos, desde que citada a fonte. DADOS INTERNACIONAIS DE CATALOGAÇÃO NA PUBLICAÇÃO(Biblioteca Virginie Buff D'Ápice da Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo) T. 3560 Tomazi, Tiago FMVZ Etiological and molecular profile of pathogens causing clinical mastitis, and antimicrobial use in dairy herds. / Tiago Tomazi. --2017. 187 f. : il.Título traduzido: Perfil etiológico e molecular de patógenos causadores de mastite clínica, e uso de antimicrobianos em rebanhos leiteiros. AGRADECIMENTOS (ACKNOWLEDGEMENTS)Primeiramente agradeço a Deus pelas oportunidades que me tens dado de testemunhar o amor que tens por mim. Agradeço também ao Senhor pelos animais, seres divinos e frutos do meu trabalho. É em suas mãos que entrego as rédeas da minha vida.Agradeço também à Nossa Senhora de Lourdes por iluminar o meu caminho e a minha família. E por sempre atender aos meus pedidos.A minha família por jamais deixar faltar confiança, apoio, carinho, compreensão e amor.E por provar que um coração pode se sentir aquecido e amado, mesmo a quilômetros de distância. Muito obrigado a minha mãe, pai e irmãos Lucas e Lutiene.Aos meus avós Alcides, Elvira, Alberto e Antonieta por me ensinar o "respeito", uma das virtudes mais belas de um ser humano.A minha namorada, noiva e confidente Ana Carolina de Campos Henrique, que tem um coração enormemente capaz de suportar meu amor e todos os outros sentimentos às vezes não tão prazerosos. Meus momentos felizes ficam ainda mais felizes ao seu lado; e meus momentos de tristeza e fraqueza logo se desfazem na presença de sua palavra e companhia. quarter-cases of CM were recorded and the most frequently isolated pathogens were Escherichia coli (6.6% of total cultures), Streptococcus uberis (6.1%), and Streptococcus agalactiae (5.9%). The majority of CM cases were mild (60.3%), while 34.1% were moderate and 5.6% severe. Overall, the IRCM was 9.7 quarter-cases per 10,000 quarter-days at risk (QDAR), and the only herd-level parameter associated with overall IRCM was BMSCC, in which the highest IRCM was observed for herds with BMSCC >600.000 × 10 3 cells/mL. In the models evaluating the specific-pathogen groups, IRCM with isolation of major contagious pathogens was associated with BMSCC, milk yield and housing system. For the evaluation of other Gram-positive pathogens, the IRCM was higher in the rainy season of 2015 in comparison with the other seasonal categories. In addition, for the model evaluating the Gram-negative group, the IRCM was highest in herds with BMTBC >30 × 10 3 cfu/mL. The Study 2 aimed to characterize the treatment profile and quantify the antimicrobial consumption for treatment of CM in dairy herds; and to determine the association of antimicrobial use (AMU) and the same herd-level descriptors as described in the Study 1. Data on treatment practices and AMU were obtained from 19 dairy herds for a period of 12 months per herd. The AMU for treatment of CM was quantifie...

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Section: Descriptive Results and Rapd Typingsupporting

confidence: 86%

Section: Descriptive Results and Rapd Typingsupporting

confidence: 78%

“…The minimal β-lactams resistance of Strep. agalactiae isolates found in our study agrees with the results reported by other (GUÉRIN-FAUBLÉE et al, 2002;KACZOREK et al, 2017).…”

Section: Evaluated 60supporting

confidence: 93%

Section: Descriptive Results and Rapd Typingmentioning

confidence: 75%

Section: Evaluated 60mentioning

confidence: 99%

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<b>Etiological and molecular profile of pathogens causing clinical mastitis, and antimicrobial use in dairy herds</b>

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Phenotypic and Genotypic Characterization of Antimicrobial Resistance in Streptococci Isolated from Human and Animal Clinical Specimens

2023

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Recently, the phenomenon of infection of humans as hosts by animal pathogens has been increasing. Streptococcus is an example of a genus in which bacteria overcome the species barrier. Therefore, monitoring infections caused by new species of human pathogens is critical to their spread. Seventy-five isolates belonging to streptococcal species that have recently been reported as a cause of human infections with varying frequency, were tested. The aim of the study was to determine the drug resistance profiles of the tested strains, the occurrence of resistance genes and genes encoding the most important streptococcal virulence factors. All tested isolates retained sensitivity to β-lactam antibiotics. Resistance to tetracyclines occurred in 56% of the tested strains. We have detected the MLSB type resistance (cross-resistance to macrolide, lincosamide, and streptogramin B) in 20% of the tested strains. 99% of the strains had tetracycline resistance genes. The erm class genes encoding MLSB resistance were present in 47% of strains. Among the strains with MLSB resistance, 92% had the streptokinase gene, 58% the streptolysin O gene and 33% the streptolysin S gene. The most extensive resistance concerned isolates that accumulated the most traits and genes, both resistance genes and virulence genes, increasing their pathogenic potential. Among the tested strains, the gene encoding streptokinase was the most common. The results of the prove that bacteria of the species S. uberis, S. dysgalactiae and S. gallolyticus are characterized by a high pathogenic potential and can pose a significant threat in case of infection of the human body.

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Phenotypic and genotypic antimicrobial susceptibility pattern of Streptococcus spp. isolated from cases of clinical mastitis in dairy cattle in Poland

Cited by 56 publications

References 52 publications

<b>Etiological and molecular profile of pathogens causing clinical mastitis, and antimicrobial use in dairy herds</b>

<b>Etiological and molecular profile of pathogens causing clinical mastitis, and antimicrobial use in dairy herds</b>

Survey on Genomic Prediction in Biomedical Using Artificial Intelligence

Phenotypic and Genotypic Characterization of Antimicrobial Resistance in Streptococci Isolated from Human and Animal Clinical Specimens

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