Resistencia antimicrobiana de Streptococcus agalactiae de origen humano y bovino

Jaramillo-Jaramillo, Ana S.; Cobo-Ángel, Claudia; Moreno-Tolosa, Yenny; CebaÍÍos-Márquez, Alejandro

doi:10.21615/cesmvz.13.1.5

Cited by 7 publications

(12 citation statements)

References 58 publications

(93 reference statements)

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“…Unique identifiers (e.g., P2_4) were assigned to quotes from participating farmers with the first number representing the participant id within the focus group (1)(2)(3)(4)(5)(6)(7)(8) and the second number representing the session (1-7). Square brackets (i.e., [.…”

Section: Discussionmentioning

confidence: 99%

A Focus Group Study of Canadian Dairy Farmers' Attitudes and Social Referents on Antimicrobial Use and Antimicrobial Resistance

et al. 2021

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As part of broader actions to combat antimicrobial resistance (AMR), health authorities have promoted the reduction of antimicrobial use (AMU) in food animals. Farmers' attitudes and receptivity to reduction of AMU appear to be variable and context specific. Our research objectives were to gain insight into Canadian dairy farmers' attitudes toward AMU, AMR, and AMU-reduction in the dairy industry, and to explore drivers and barriers to change AMU, including the influence of social referents. We conducted seven focus groups with 42 farmers in two provinces of Canada (New Brunswick and Ontario) and used thematic analysis to identify, analyze, and report patterns in the data. Our results indicate that farmers usually rely on their previous experience and judgement of individual cases of disease when making decisions related to AMU. External referents included other farmers, family members, and veterinarians. However, veterinarians were generally only consulted for unusual cases. Participants in this study expressed that maintaining cattle welfare is their responsibility, and that they were not willing to jeopardize animal welfare in order to reduce AMU. In addition, farmers regarded the cost of investment in improved facilities to prevent disease as an important barrier to reduce AMU. Finally, the majority of participants considered themselves to be low users of antimicrobials and perceived a small role of AMU on dairy farms in AMR. In conclusion, farmers from this study showed self-reliance to decide about AMU on their farms and considered animal-related and economic factors in these decisions. There was a general lack of knowledge of how to reduce AMU without investing in facilities, and there is an opportunity to motivate increased involvement of the veterinarian in AMU-related decisions. These results should be considered to design and refine antimicrobial stewardship programs for dairy farms.

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Section: Discussionmentioning

confidence: 99%

A Focus Group Study of Canadian Dairy Farmers' Attitudes and Social Referents on Antimicrobial Use and Antimicrobial Resistance

et al. 2021

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“…Besides the high importance of GBS as an animal pathogen, involved in several pathologies in different hosts, S. agalactiae also has high importance in public health. High resistance levels have been demonstrated in strains isolated from human beings (Botelho et al, 2018;Jaramillo-Jaramillo et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…This creates the risk of the inefficacy of the treatment protocols for animal and human infections caused by this pathogen. Futhermore, the occurrence of multidrug resistance (MDR) strains of GBS among animals, especially in fish and cattle, increases the threats to human health by the occurrence of interspecies infection, as pointed out in several studies (Botelho et al, 2018;Jaramillo-Jaramillo et al, 2018), and the risk of horizontal transference of resistance genes among GBS of animal and human sources (Pinto et al, 2014). In our study, we found two MDR strains, one of which is resistant to seven classes of antimicrobials, which highlights the need for surveillance over the emergence of MDR S. agalactiae among animal strains.…”

Section: Discussionmentioning

confidence: 99%

Antimicrobial susceptibility profile of Streptococcus agalactiae strains isolated from bovine mastitis

Costa¹,

Ribeiro²,

Gonçalves³

et al. 2021

Braz. J. Vet. Res. Anim. Sci.

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Bovine mastitis is the most important disease of dairy herds worldwide. Its main etiologic agents are bacteria, including Streptococcus agalactiae. The importance of this agent in bovine mastitis is because it is highly contagious and has a high impact on the occurrence of clinical mastitis cases and in the increase of the bulk milk somatic cell counts. The dry cow therapy and the treatment of the clinical mastitis cases stand out among the measures to control intramammary infections in cows. However, these strategies require knowledge about the antimicrobial susceptibility of the causal microorganisms. Thus, this study aimed to evaluate the antimicrobial susceptibility of 89 S. agalactiae strains isolated from bovine mastitis between the years 2004 and 2008 in dairy herds from Campo das Vertentes region, Minas Gerais State, Brazil. The disc diffusion technique was used and the antimicrobials currently used in mastitis therapy were tested. The isolates tested showed 100% susceptibility to chloramphenicol, ceftiofur, cefotaxime, enrofloxacin, and cefquinome. High frequencies of susceptibility (>95%) were also observed for the beta-lactams (penicillin G, ampicillin, and oxacillin), cephalosporins (cephalotin, ceftiofur, cefotaxime, cefoperazone, and cefquinome), florfenicol, gentamicin, lincomycin, nitrofurantoin, and sulfamethoprim. The strains showed high frequencies of resistance to neomycin (15.74%), and tetracycline (21.35%). Multidrug resistance was detected in 2.25% of the tested isolates. The results pointed to variations in the antimicrobial susceptibility profiles of the studied strains and the importance of the use of the susceptibility tests to determine the correct antimicrobial to be applied in the treatment of bovine mastitis caused by S. agalactiae. The high frequencies of resistance observed to some antimicrobials, such as neomycin and tetracycline, commonly used in the treatment of mastitis and other pathologies, highlighted the need for more judicious use of antimicrobials on dairy farms.

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“…In GBS, tetracycline resistance is primarily due to ribosomal protection and encoded by tet (M) or tet (O) 56 . In our study, tet (M) was the most common resistance gene in human and bovine isolates.…”

Section: Discussionmentioning

confidence: 99%

Potential group B Streptococcus interspecies transmission between cattle and people in Colombian dairy farms

Cobo-Ángel

Jaramillo-Jaramillo

Palacio-Aguilera

et al. 2019

Sci Rep

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Group B Streptococcus (GBS), is a leading cause of neonatal death and an emerging pathogen in adults. Additionally, GBS is a bovine pathogen causing intramammary infections. The likelihood of GBS interspecies transmission is largely unknown. We explored the potential transmission of GBS between cattle and people on dairy farms in Colombia and compared the antimicrobial resistance (AMR) profiles of isolates from both host species. Across 33 farms, throat swabs and rectal swabs were collected from 191 people, and rectal swabs and composite milk samples from 2092 cattle, yielding 60 human isolates and 301 bovine isolates. The majority (64%) of isolates belonged to shared sequence types (ST). Sequence type (ST) 1 was the most common strain in both host species, suggesting that interspecies transmission may be possible. Two members of the bovine-specific clonal complex 61/67 were detected in human samples (ST718 and ST1175), providing evidence for the lack of genuine species barriers. Apparent prevalence of penicillin resistance was surprisingly high in human and bovine isolates. Further investigation of this phenomenon is needed and could lead to modification of standard testing and treatment recommendations in human and veterinary medicine.

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Resistencia antimicrobiana de Streptococcus agalactiae de origen humano y bovino

Abstract: Artículo de revisión Antimicrobial resistance of Streptococcus agalactiae of human and bovine origin Resistencia antimicrobiana de Streptococcus agalactiae de origen humano y bovinoResistência antimicrobiana de Streptococcus agalactiae de origem humana e bovina

Cited by 7 publications

References 58 publications

A Focus Group Study of Canadian Dairy Farmers' Attitudes and Social Referents on Antimicrobial Use and Antimicrobial Resistance

A Focus Group Study of Canadian Dairy Farmers' Attitudes and Social Referents on Antimicrobial Use and Antimicrobial Resistance

Antimicrobial susceptibility profile of Streptococcus agalactiae strains isolated from bovine mastitis

Potential group B Streptococcus interspecies transmission between cattle and people in Colombian dairy farms

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