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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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-07-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/84/1/172 |
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| 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 |
| collection | DOAJ |
| 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.; |
| first_indexed | 2024-12-19T03:37:47Z |
| format | Article |
| id | doaj.art-875b5d6077e542198f56eecb40c8129a |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-12-19T03:37:47Z |
| publishDate | 2021-07-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-875b5d6077e542198f56eecb40c8129a2022-12-21T20:37:20ZengIWA PublishingWater Science and Technology0273-12231996-97322021-07-0184117218110.2166/wst.2021.207207Antibiotic resistance and antibiotic-resistance genes of Pseudomonas spp. and Escherichia coli isolated from untreated hospital wastewaterFarzaneh Baghal Asghari0Mohammad Hadi Dehghani1Reza Dehghanzadeh2Davoud Farajzadeh3Kamyar Yaghmaeian4Amir Hossein Mahvi5Akbar Rajabi6 Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Health and Environment Research Center, Tabriz University of Medical Sciences, Tabriz, Iran Department of Cellular and Molecular Biology, Faculty of Biological Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran Health and Environment Research Center, Tabriz University of Medical Sciences, Tabriz, Iran 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.;http://wst.iwaponline.com/content/84/1/172antibiotic resistantescherichia colihospital wastewatermultiplex pcrpseudomonas aeruginosa |
| spellingShingle | 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 Water Science and Technology antibiotic resistant escherichia coli hospital wastewater multiplex pcr pseudomonas aeruginosa |
| title | 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_short | 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 |
| topic | antibiotic resistant escherichia coli hospital wastewater multiplex pcr pseudomonas aeruginosa |
| url | http://wst.iwaponline.com/content/84/1/172 |
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