Concentração inibitória mínima de oxitetraciclina para isolados de Aeromonas Hydrophila obtidos de diferentes fontes

Júnior, Delton José Pereira; Figueiredo, Henrique César Pereira; Carneiro, Daniela Oliveira; Leal, Carlos Augusto Gomes

doi:10.1590/s1413-70542006000600023

Cited by 5 publications

(7 citation statements)

References 11 publications

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“…Several variation sources may interfere with the MIC values for a determined antimicrobial, such as the form of drug dilution, the type of culture medium used, the standardization of the bacterial inoculum and the incubation temperature (PEREIRA JÚNIOR et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

PROPAGATION OF ANTIMICROBIAL RESISTANT Salmonella spp. IN BIVALVE MOLLUSKS FROM ESTUARY AREAS OF BAHIA, BRAZIL

2016

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-In recent years, the emergence of resistant pathogens has complicated the treatment of bacterial infections in livestock production as well as in the medical field, due to the development of resistance mechanisms by microorganisms. The objective of this study was to delineate the antimicrobial resistance profile of Salmonella spp. strains isolated from bivalve mollusks (oysters and mussels) and from estuarine environment water of two regions of Bahia, Brazil. Twenty-seven strains, 12 isolated from bivalve mollusks and 15 from estuarine water, were tested. Eight antimicrobial agents (phenicol, beta-lactams, tetracyclines, quinolones and fluoroquinolones classes) were used for a susceptibility test, Minimum Inhibitory Concentration (MIC) and extended-spectrum beta-lactamases (ESBLs) production. Isolates showed high susceptibility to the classes of antimicrobial agents tested, with resistance only to nalidixic acid (27%), ampicillin (25%) and tetracycline (25%). Bacterial resistance was of chromosomal origin and the multidrug resistance index (MAR) among isolates of shellfish (mussels in natura) was 0.25. The MIC was found to be 100 µg/mL, 500 µg/mL and 350 µg/mL to nalidixic acid, ampicillin and tetracycline, respectively. None of the isolates presented ESBLs production. The presence of multidrug-resistant and high MIC Salmonella spp. is being conveyed in extraction areas of bivalve mollusks in the State of Bahia, Brazil.

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Section: Resultsmentioning

confidence: 99%

PROPAGATION OF ANTIMICROBIAL RESISTANT Salmonella spp. IN BIVALVE MOLLUSKS FROM ESTUARY AREAS OF BAHIA, BRAZIL

2016

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“…was the most prevalent among the Gram-positive (De Oliveira and Pinhata, 2008;Oliveira et al, 2010;Resende et al, 2012) and the Aeromonas spp. was the most prevalent among the Gram-negative and among all surveyed works (Hirsch et al, 2006;Pereira Júnior et al, 2006;Scoaris et al, 2008;. Pontes et al, 2009;Ribeiro et al, 2010;Ribeiro, 2011).…”

Section: Resultsmentioning

confidence: 96%

“…During the last 25 years in Brazil, resistant bacteria have already been identified in river waters (De Mondino et al, 1995;Souza et al, 2000;Falcão et al, 2004), lakes and ponds; (De Mondino et al, 1995;Falcão et al, 2004;Pontes et al, 2009;Salloto et al, 2012) and in the sea (De Mondino et al, 1995;Falcão et al, 2004;Cardonha et al, 2004;De Oliveira and Pinhata, 2008;De Oliveira et al, 2010). Bacteria were also identified in sewage treatment stations (Prado et al, 2008;Souza et al, 2000;Ribeiro, 2011), in the water of tanks used for aquaculture (Hirsch et al, 2006;Pereira Júnior et al, 2006;Lima et al, 2006;Ribeiro et al, 2010;Ribeiro, 2011;Resende et al, 2012) and, even more worryingly, in drinking water (Silva et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

“…In most of the studies published during the investigation period, the Gram-negative bacteria were the most prevalent microorganisms, almost all of them belonging to the Enterobacteriaceae family, which contains the group of coliforms (De Mondino et al, 1995;Souza et al, 2000;Falcão et al, 2004;Lima et al, 2006;Pereira Júnior et al, 2006;Hirsch et al, 2006;Scoaris et al, 2008;Prado et al, 2008;Silva et al, 2008;Pontes et al, 2009;Ribeiro et al, 2010;Rebouças et al, 2011;Ribeiro, 2011;Resende et al, 2012;Salloto et al, 2012), however, Gram-positive bacteria were also isolated (De Oliveira and Pinhata, 2008;Oliveira et al, 2010;Salloto et al, 2012). The Enterococcus spp.…”

Section: Resultsmentioning

confidence: 99%

“…The isolation of Aeromonas spp. and the interest in their identification can also be attributed to the fact that human exposure to contaminated water by this pathogen, through ingestion or even direct contact, has been associated with various infections, especially in immune-compromised individuals (Pereira Júnior et al, 2006;. Ribeiro et al, 2010) elderly and children (Scoaris et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

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Antimicrobial resistance in bacteria isolated from aquatic environments in Brazil: a systematic review

Nascimento¹,

Araújo²

2014

Rev. ambiente água

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This article discusses antibiotic resistance in bacteria isolated from aquatic environments in Brazil, taking into account isolation sites, the main reported antimicrobial agents, the genes involved in resistance, the most prevalent bacterial genera and species, and the main mechanisms of resistance. This review is based upon specialized literature, consulting published scientific articles selected from the SciELO, PubMed and LILACS databases. Based upon the inclusion criteria, we selected 21 articles, most (61.6%) were from PubMed, with the highest prevalence for work done in the Southeast region (71.4%) in freshwater environments (71.4%), and the major focus on farm ponds (28.6%). Gram-negative bacteria are the most studied (71.4%) and the Aeromonas spp. was the one found most frequently (19.0%). The most frequently used antimicrobials were chloramphenicol (81.0%), gentamicin (76.2%), sulpha/trimethroprim (71.4%), ampicillin (61.9%) and tetracycline (71.4%); and the ones with higher prevalence of resistance were chloramphenicol (58.8%), sulpha/trimethroprim (78.5%) and ampicillin (84.6%). It was found that studies on resistance in other aquatic environments have not yet been conducted in Brazil, especially in the North and Northeast regions, where irregular rainfall distribution leads to the use of reservoirs as supply sources during the dry season, highlighting concerns regarding the quality, contamination and maintenance of these resources, as the water is intended for human use or for production purposes. Resistência antimicrobiana em bactérias isoladas de ambientes aquáticos no Brasil: uma revisão sistemática RESUMOEste artigo tem como objetivo discutir a resistência antimicrobiana em bactérias isoladas de ambientes aquáticos no Brasil, levando em conta os locais de isolamento, os principais agentes antimicrobianos relatados, os genes envolvidos na resistência, os gêneros e espécies bacterianas mais prevalentes e os principais mecanismos de resistência presentes. Trata-se de uma revisão bibliográfica sistemática baseada em literatura especializada por meio de consulta a artigos científicos publicados e selecionados através de busca em bancos de dados 240 Ermeton Duarte do Nascimento et al.

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Evaluation of antibiotics as a methodological procedure to inhibit free-living and biofilm bacteria in marine zooplankton culture

Agostini

Macêdo

Muxagata

2016

An. Acad. Bras. Ciênc.

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There is a problem with keeping culture medium completely or partially free from bacteria. The use of prokaryotic metabolic inhibitors, such as antibiotics, is suggested as an alternative solution, although such substances should not harm non-target organisms. Thus, the aim of this study was to assess the effectiveness of antibiotic treatments in inhibiting free-living and biofilm bacteria and their half-life in artificial marine environment using the copepod Acartia tonsa as bioindicador of non-harmful antibiotic combinations. Regarding to results, the application of 0.025 g L -1 penicillin G potassium + 0.08 g L -1streptomycin sulphate + 0.04 g L -1 neomycin sulphate showed great potential for use in marine cultures and scientific experiments without lethal effects to non-target organisms. The effect of this combination starts within the first six hours of exposure and reduces up to 93 % the bacterial density, but the half-life is short, requiring replacement. No adverse changes in water quality were observed within 168 hours of exposure. As a conclusion, we can infer that this treatment was an effective procedure for zooplankton cultures and scientific experiments with the aim of measuring the role of free-living and biofilm in the marine community.

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Concentração inibitória mínima de oxitetraciclina para isolados de Aeromonas Hydrophila obtidos de diferentes fontes

Cited by 5 publications

References 11 publications

PROPAGATION OF ANTIMICROBIAL RESISTANT Salmonella spp. IN BIVALVE MOLLUSKS FROM ESTUARY AREAS OF BAHIA, BRAZIL

PROPAGATION OF ANTIMICROBIAL RESISTANT Salmonella spp. IN BIVALVE MOLLUSKS FROM ESTUARY AREAS OF BAHIA, BRAZIL

Antimicrobial resistance in bacteria isolated from aquatic environments in Brazil: a systematic review

Evaluation of antibiotics as a methodological procedure to inhibit free-living and biofilm bacteria in marine zooplankton culture

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