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Title: Gulls identified as major source of fecal pollution in coastal waters: a microbial source tracking study
Author: Araújo, Susana
Henriques, Isabel S.
Leandro, Sérgio Miguel
Alves, Artur
Pereira, Anabela
Correia, António
Keywords: BOX-PCR
Escherichia coli
Fecal pollution
Microbial source tracking
Public health
Issue Date: 2014
Publisher: Elsevier
Abstract: GGulls were reported as sources of fecal pollution in coastal environments and potential vectors of human infections. Microbial source tracking (MST) methods were rarely tested to identify this pollution origin. This study was conducted to ascertain the source of water fecal contamination in the Berlenga Island, Portugal. A total of 169 Escherichia coli isolates from human sewage, 423 isolates from gull feces and 334 water isolates were analyzed by BOX-PCR. An average correct classification of 79.3% was achieved. When an 85% similarity cutoff was applied 24% of water isolates were present in gull feces against 2.7% detected in sewage. Jackknifing resulted in 29.3% of water isolates classified as gull, and 10.8% classified as human. Results indicate that gulls constitute a major source of water contamination in the Berlenga Island. This study validated a methodology to differentiate human and gull fecal pollution sources in a real case of a contaminated beach.
Peer review: yes
DOI: 10.1016/j.scitotenv.2013.09.075
ISSN: 0048-9697
Appears in Collections:CESAM - Artigos
DBio - Artigos

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