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Pathogenicity and Antimicrobial Resistance in Coagulase-Negative Staphylococci

Journal of Biosciences and Medicines 2023年第5期11卷 9-29页

作者： debora brito goulart Department of Veterinary Microbiology and Preventive Medicine Iowa State University Ames IA USA

The coagulase-negative staphylococci (CoNS) group was considered saprophytic or rarely pathogenic for many years. Since the first case of septicemia caused by CoNS, there has been a progressive increase in the prevalence of healthcare-associated infections caused by CoNS. The CoNS group has emerged as one of the main causes of nosocomial infections related to vascular catheters and prostheses, especially among immunocompromised patients. This gradual increase in infections is due to the change in the relationship between patients and procedures since CoNS are closely related to devices implanted in the human body. CoNS are successful in colonizing the host because they have several virulence mechanisms, such as biofilm formation and production of enzymes and toxins, in addition to several mechanisms of resistance to antimicrobials. Despite their great clinical relevance, few studies have focused on CoNS’s pathogenicity and resistance to antimicrobials, which reveals the current need to better understand the factors by which this group became pathogenic to humans and other animals. This review aims to synthesize the aspects related to the pathogenicity and antimicrobial resistance in CoNS.

关键词： Coagulase-Negative Staphylococci Antimicrobial-Resistance Biofilm Nosocomial Infections Pathogenesis Beta-Lactams Antibiotics Glycopeptide Antibiotics Macrolide Antibiotics Septicemia Bacteremia

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Vibrio *** Macrobrachium amazonicum prawn farming are inhibited by Moringa oleifera extracts

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Asian Pacific Journal of Tropical Medicine 2015年第11期8卷 899-902页

作者： Raimunda Samia Nogueira Brilhante Jamille Alencar Sales Celia Maria de Souza Sampaio Francisco Geraldo Barbosa Manoel de Araujo Neto Paiva Glaucia Morgana de Melo Guedes Lucas Pereira de Alencar Yago brito de Ponte Tereza de Jesus Pinheiro Gomes Bandeira Jose Luciano Bezerra Moreira debora de Souza Collares Maia Castelo-Branco Waldemiro de Aquino Pereira-Neto Rossana de Aguiar Cordeiro Jose Julio Costa Sidrim Marcos Fabio Gadelha Rocha Department of Pathology and Legal Medicine Postgraduate Program in Medical MicrobiologySpecialized Medical Mycology CenterFederal University of Ceara School of Veterinary Medicine Postgraduate Program in Veterinary SciencesState University of Ceara Department of Organic and Inorganic Chemistry Federal University of Ceara

Objective:To investigate the in vitro antimicrobial potential of extracts of stem,leaves,flowers,pods and seeds of Moringu okifera(***) against Vibrio *** hatchery water and the prawn Mmrobrachium ***:The ethanol extracts of stem,leaves,pods and seeds and chloroform extract of flowers of *** were tested against Vibrio cholerue(***) serogroups non-O1/non-O139(n=4).Vibrio vulnificus(n=l) and Vibrio mimicus(n=1).Escherichia coli(***)(ATCC(?) 25922) was used as quality *** species were obtained from Macmbrachium amazonicum prawns and from hatchery water from prawn *** Minimum Inhibitory Concentration(MIC) was determined by broth microdilution ***:The best result was obtained with the ethanol extract of pods,which inhibited three strains of the ***,Vibrio vulnificus,Vibrio minimis and ***(MIC range 0.312-5.000 mg/mL).The chloroform extract of flowers was effective against all *** strains and ***(MIC range 0.625-1.250 mg/mL).However,the ethanol extracts of stem and seeds showed low effectiveness in inhibiting the bacterial ***:The extracts of pods,flowers and leaves of *** have potential for the control of Vibrio *** studies are necessary to isolate the bioaetive compounds responsible for this antimicrobial activity.

关键词： Prawn Macrobrachium amazonicum Moringa oleifera Vi

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