Antibiotic resistance and antibiotic-resistance genes of Pseudomonas spp. and Escherichia coli isolated from untreated hospital wastewater

Hospitals are considered an important factor in the spread of antibiotic-resistant bacteria (ARBs) and antibiotic-resistance genes (ARGs). The purpose of this research was to characterize the microbial populations in hospital wastewater and investigated the prevalence of β-lactamase, SulІ and QnrS r...

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Autores principales:	Farzaneh Baghal Asghari, Mohammad Hadi Dehghani, Reza Dehghanzadeh, Davoud Farajzadeh, Kamyar Yaghmaeian, Amir Hossein Mahvi, Akbar Rajabi
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	antibiotic resistant escherichia coli hospital wastewater multiplex pcr pseudomonas aeruginosa Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/875b5d6077e542198f56eecb40c8129a
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spelling	oai:doaj.org-article:875b5d6077e542198f56eecb40c8129a2021-11-06T11:11:53ZAntibiotic resistance and antibiotic-resistance genes of Pseudomonas spp. and Escherichia coli isolated from untreated hospital wastewater0273-12231996-973210.2166/wst.2021.207https://doaj.org/article/875b5d6077e542198f56eecb40c8129a2021-07-01T00:00:00Zhttp://wst.iwaponline.com/content/84/1/172https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Hospitals are considered an important factor in the spread of antibiotic-resistant bacteria (ARBs) and antibiotic-resistance genes (ARGs). The purpose of this research was to characterize the microbial populations in hospital wastewater and investigated the prevalence of β-lactamase, SulІ and QnrS resistance genes. In the first step, culture method was used to isolate Pseudomonas aeruginosa and Escherichia coli. In the next step, accurate identification of isolated bacteria was carried out using the polymerase chain reaction (PCR) method, then the resistance of the bacteria at different concentrations of antibiotics (8–128 μg/mL) was examined. Finally the ARGs were detected using the PCR method. The averages of heterotrophic plate count (HPC) and ARB concentration in wastewater samples were 1.8 × 108 and 4.3 × 106 CFU/100 mL, respectively. The highest resistance rates were found for sulfamethoxazole and the highest resistance rates in the β-lactamase group were for ceftazidime, while highest sensitivity was for gentamicin and there was no isolate that was sensitive to the studied antibiotics. SulІ and QnrS were the highest and lowest abundance of all ARGs in samples respectively and blaSHV was the highest β-lactam resistance gene. Our results indicated an increase in the resistance of identified bacteria to several antibiotics. So it can be concluded that numerous antibiotic-resistant pathogens and vast numbers of ARGs exist in the human body so that their release from hospitals without effective treatment can cause many dangers to the environment and human health. Highlights In this study, five types of bacteria were extracted from EMB agar, two types of these bacteria were Escherichia coli.; The identified Escherichia coli both had the SUL, SHV, TEM genes and only one type of Escherichia coli CTX had the QnrS gene; The highest abundance of ARG, among identified Pseudomonas grown on cetrimide agar was sulfadimidine-resistance gene.;Farzaneh Baghal AsghariMohammad Hadi DehghaniReza DehghanzadehDavoud FarajzadehKamyar YaghmaeianAmir Hossein MahviAkbar RajabiIWA Publishingarticleantibiotic resistantescherichia colihospital wastewatermultiplex pcrpseudomonas aeruginosaEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 1, Pp 172-181 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	antibiotic resistant escherichia coli hospital wastewater multiplex pcr pseudomonas aeruginosa Environmental technology. Sanitary engineering TD1-1066
spellingShingle	antibiotic resistant escherichia coli hospital wastewater multiplex pcr pseudomonas aeruginosa Environmental technology. Sanitary engineering TD1-1066 Farzaneh Baghal Asghari Mohammad Hadi Dehghani Reza Dehghanzadeh Davoud Farajzadeh Kamyar Yaghmaeian Amir Hossein Mahvi Akbar Rajabi Antibiotic resistance and antibiotic-resistance genes of Pseudomonas spp. and Escherichia coli isolated from untreated hospital wastewater
description	Hospitals are considered an important factor in the spread of antibiotic-resistant bacteria (ARBs) and antibiotic-resistance genes (ARGs). The purpose of this research was to characterize the microbial populations in hospital wastewater and investigated the prevalence of β-lactamase, SulІ and QnrS resistance genes. In the first step, culture method was used to isolate Pseudomonas aeruginosa and Escherichia coli. In the next step, accurate identification of isolated bacteria was carried out using the polymerase chain reaction (PCR) method, then the resistance of the bacteria at different concentrations of antibiotics (8–128 μg/mL) was examined. Finally the ARGs were detected using the PCR method. The averages of heterotrophic plate count (HPC) and ARB concentration in wastewater samples were 1.8 × 108 and 4.3 × 106 CFU/100 mL, respectively. The highest resistance rates were found for sulfamethoxazole and the highest resistance rates in the β-lactamase group were for ceftazidime, while highest sensitivity was for gentamicin and there was no isolate that was sensitive to the studied antibiotics. SulІ and QnrS were the highest and lowest abundance of all ARGs in samples respectively and blaSHV was the highest β-lactam resistance gene. Our results indicated an increase in the resistance of identified bacteria to several antibiotics. So it can be concluded that numerous antibiotic-resistant pathogens and vast numbers of ARGs exist in the human body so that their release from hospitals without effective treatment can cause many dangers to the environment and human health. Highlights In this study, five types of bacteria were extracted from EMB agar, two types of these bacteria were Escherichia coli.; The identified Escherichia coli both had the SUL, SHV, TEM genes and only one type of Escherichia coli CTX had the QnrS gene; The highest abundance of ARG, among identified Pseudomonas grown on cetrimide agar was sulfadimidine-resistance gene.;
format	article
author	Farzaneh Baghal Asghari Mohammad Hadi Dehghani Reza Dehghanzadeh Davoud Farajzadeh Kamyar Yaghmaeian Amir Hossein Mahvi Akbar Rajabi
author_facet	Farzaneh Baghal Asghari Mohammad Hadi Dehghani Reza Dehghanzadeh Davoud Farajzadeh Kamyar Yaghmaeian Amir Hossein Mahvi Akbar Rajabi
author_sort	Farzaneh Baghal Asghari
title	Antibiotic resistance and antibiotic-resistance genes of Pseudomonas spp. and Escherichia coli isolated from untreated hospital wastewater
title_short	Antibiotic resistance and antibiotic-resistance genes of Pseudomonas spp. and Escherichia coli isolated from untreated hospital wastewater
title_full	Antibiotic resistance and antibiotic-resistance genes of Pseudomonas spp. and Escherichia coli isolated from untreated hospital wastewater
title_fullStr	Antibiotic resistance and antibiotic-resistance genes of Pseudomonas spp. and Escherichia coli isolated from untreated hospital wastewater
title_full_unstemmed	Antibiotic resistance and antibiotic-resistance genes of Pseudomonas spp. and Escherichia coli isolated from untreated hospital wastewater
title_sort	antibiotic resistance and antibiotic-resistance genes of pseudomonas spp. and escherichia coli isolated from untreated hospital wastewater
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/875b5d6077e542198f56eecb40c8129a
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Antibiotic resistance and antibiotic-resistance genes of Pseudomonas spp. and Escherichia coli isolated from untreated hospital wastewater

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