Seasonal dynamics of coliform diversity and antibiotic resistance in city-dwelling Cattle Egrets (Bubulcus ibis) in Udaipur, India: implications for One Health.
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| Title: | Seasonal dynamics of coliform diversity and antibiotic resistance in city-dwelling Cattle Egrets (Bubulcus ibis) in Udaipur, India: implications for One Health. |
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| Authors: | Kumari, Alka1 (AUTHOR) me.alkakumari@gmail.com, Singh, Namita Ashish2 (AUTHOR) namita.singh@mlsu.ac.in, Koli, Vijay Kumar1 (AUTHOR) vijaykoli87@yahoo.in |
| Source: | Environmental Monitoring & Assessment. Apr2026, Vol. 198 Issue 4, p1-15. 15p. |
| Subject Terms: | *Multidrug resistance, *Coliforms, *Seasonal physiological variations, *Urban animals, *Drug resistance in microorganisms |
| Geographic Terms: | India, Udaipur (India : District), Rajasthan (India) |
| Abstract: | Antimicrobial resistance (AMR) is a growing global concern within the One Health framework, yet the role of synanthropic wild birds in harboring and disseminating resistant bacteria remains underexplored. This study investigated the seasonal diversity and antibiotic resistance profiles of coliform bacteria isolated from fecal samples of Cattle Egrets (Bubulcus ibis) inhabiting urban environments of Udaipur, Rajasthan, India. A total of 45 fecal samples (15 per season) were collected across monsoon, winter, and summer between July 2022 and June 2023. Sixty bacterial isolates were obtained and characterized through biochemical assays and 16S rRNA sequencing, identifying six genera: Escherichia, Enterobacter, Klebsiella, Proteus, Salmonella, and Shigella. Escherichia coli was the most prevalent species (66.7%), followed by Enterobacter spp. and others. Enterobacter chuandaensis and Escherichia fergusonii were the novel bacteria in this species. Although seasonal variation in total coliform counts was not significant, bacterial community composition differed across seasons. Antibiotic susceptibility testing against 15 antibiotics revealed high resistance to linezolid (100%), rifampicin (100%), and erythromycin (46%), while gentamicin remained effective. Overall, 33.3% of isolates were multidrug resistant (MDR), with E. coli showing the highest resistance. These findings underscore the potential of urban-dwelling Cattle Egrets to act as reservoirs and vectors of AMR, highlighting the need for expanded genomic surveillance and integrated management within the One Health paradigm. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 193283079 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Seasonal dynamics of coliform diversity and antibiotic resistance in city-dwelling Cattle Egrets (Bubulcus ibis) in Udaipur, India: implications for One Health. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kumari%2C+Alka%22">Kumari, Alka</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> me.alkakumari@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Singh%2C+Namita+Ashish%22">Singh, Namita Ashish</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> namita.singh@mlsu.ac.in</i><br /><searchLink fieldCode="AR" term="%22Koli%2C+Vijay+Kumar%22">Koli, Vijay Kumar</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> vijaykoli87@yahoo.in</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Environmental+Monitoring+%26+Assessment%22">Environmental Monitoring & Assessment</searchLink>. Apr2026, Vol. 198 Issue 4, p1-15. 15p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Multidrug+resistance%22">Multidrug resistance</searchLink><br />*<searchLink fieldCode="DE" term="%22Coliforms%22">Coliforms</searchLink><br />*<searchLink fieldCode="DE" term="%22Seasonal+physiological+variations%22">Seasonal physiological variations</searchLink><br />*<searchLink fieldCode="DE" term="%22Urban+animals%22">Urban animals</searchLink><br />*<searchLink fieldCode="DE" term="%22Drug+resistance+in+microorganisms%22">Drug resistance in microorganisms</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22India%22">India</searchLink><br /><searchLink fieldCode="DE" term="%22Udaipur+%28India+%3A+District%29%22">Udaipur (India : District)</searchLink><br /><searchLink fieldCode="DE" term="%22Rajasthan+%28India%29%22">Rajasthan (India)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Antimicrobial resistance (AMR) is a growing global concern within the One Health framework, yet the role of synanthropic wild birds in harboring and disseminating resistant bacteria remains underexplored. This study investigated the seasonal diversity and antibiotic resistance profiles of coliform bacteria isolated from fecal samples of Cattle Egrets (Bubulcus ibis) inhabiting urban environments of Udaipur, Rajasthan, India. A total of 45 fecal samples (15 per season) were collected across monsoon, winter, and summer between July 2022 and June 2023. Sixty bacterial isolates were obtained and characterized through biochemical assays and 16S rRNA sequencing, identifying six genera: Escherichia, Enterobacter, Klebsiella, Proteus, Salmonella, and Shigella. Escherichia coli was the most prevalent species (66.7%), followed by Enterobacter spp. and others. Enterobacter chuandaensis and Escherichia fergusonii were the novel bacteria in this species. Although seasonal variation in total coliform counts was not significant, bacterial community composition differed across seasons. Antibiotic susceptibility testing against 15 antibiotics revealed high resistance to linezolid (100%), rifampicin (100%), and erythromycin (46%), while gentamicin remained effective. Overall, 33.3% of isolates were multidrug resistant (MDR), with E. coli showing the highest resistance. These findings underscore the potential of urban-dwelling Cattle Egrets to act as reservoirs and vectors of AMR, highlighting the need for expanded genomic surveillance and integrated management within the One Health paradigm. [ABSTRACT FROM AUTHOR] |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s10661-026-15257-6 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 1 Subjects: – SubjectFull: Multidrug resistance Type: general – SubjectFull: Coliforms Type: general – SubjectFull: Seasonal physiological variations Type: general – SubjectFull: Urban animals Type: general – SubjectFull: Drug resistance in microorganisms Type: general – SubjectFull: India Type: general – SubjectFull: Udaipur (India : District) Type: general – SubjectFull: Rajasthan (India) Type: general Titles: – TitleFull: Seasonal dynamics of coliform diversity and antibiotic resistance in city-dwelling Cattle Egrets (Bubulcus ibis) in Udaipur, India: implications for One Health. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kumari, Alka – PersonEntity: Name: NameFull: Singh, Namita Ashish – PersonEntity: Name: NameFull: Koli, Vijay Kumar IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 01676369 Numbering: – Type: volume Value: 198 – Type: issue Value: 4 Titles: – TitleFull: Environmental Monitoring & Assessment Type: main |
| ResultId | 1 |
