1
|
Sun F, Wang C, Chen X. Bacterial community in Sinonovacula constricta intestine and its relationship with culture environment. Appl Microbiol Biotechnol 2022; 106:5211-5220. [PMID: 35781839 DOI: 10.1007/s00253-022-12048-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/19/2022] [Accepted: 06/21/2022] [Indexed: 11/24/2022]
Abstract
Although the importance of intestinal microbes to aquaculture animals has been recognized, the intestinal bacteria of Sinonovacula constricta and its culture environment are rarely studied. In this study, high-throughput sequencing was used to explore the intestinal bacterial communities of pond water, sediment, and S. constricta intestine. Significance analysis and principal coordinates analysis (PCoA) showed that there were significant differences in bacterial communities among animals' intestine, pond water, and sediment (p < 0.05). Venn analysis showed that intestinal bacteria shared a considerable number of OTUs (operational taxonomic units) with the sediment and water. SourceTracker analysis suggested that the contribution of sediment to the intestinal bacteria of S. constricta was much larger than that of rearing water. The Kruskal-Wallis test showed that the dominant bacterial taxa differed significantly between animals' intestines and the pond environment, and each of them has a unique bacterial composition. A network diagram indicated the complex positive and negative interactions between intestinal bacteria at the OTU level. Furthermore, BugBase analysis indicated that the bacterial contribution to potential pathogens in the animals' intestines is similar to that in sediments, suggesting that sediment was the main source of potential pathogens in S. constricta intestine. This study provided a theoretical basis for environmental regulation and disease prevention of S. constricta in aquaculture. KEY POINTS: • Culture environment had a significant effect on the intestinal bacterial community in S. constricta. • Sediment was a major source of intestinal bacteria and potentially pathogenic bacteria. • Complex positive and negative interactions existed between intestinal bacteria.
Collapse
Affiliation(s)
- Fulin Sun
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China. .,Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, China. .,Sanya Institute of Oceanology, South China Sea Institute of Oceanology, Sanya, China.
| | - Chunzhong Wang
- Putian Institute of Aquaculture Science of Fujian Province, Putian, China
| | - Xuelian Chen
- Putian Tian Ran Xing Agriculture Development Co. Ltd, Putian, China
| |
Collapse
|
2
|
Boufafa M, Kadri S, Redder P, Bensouilah M. Occurrence and distribution of fecal indicators and pathogenic bacteria in seawater and Perna perna mussel in the Gulf of Annaba (Southern Mediterranean). Environ Sci Pollut Res Int 2021; 28:46035-46052. [PMID: 33884549 DOI: 10.1007/s11356-021-13978-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 04/13/2021] [Indexed: 06/12/2023]
Abstract
The identification of fecal contamination in coastal marine ecosystems is one of the main requirements for evaluation of potential risks to human health. The objective of this study was to investigate the occurrence and distribution of fecal indicators and pathogenic bacteria in seawaters and mussels collected monthly during a period of 1 year from four different sites in Northeastern Algeria (sites S1 to S4), through biochemical and molecular analyses. Our research is the first to use molecular analysis to unambiguously identify the potentially pathogenic bacteria present in Algerian Perna perna mussels. The obtained results revealed that the levels of fecal indicator bacteria (FIB) from both P. perna and seawater samples largely exceeded the permissible limits at S2 and S3. This is mainly related to their location close to industrial and coastal activity zones, which contain a mixture of urban, agricultural, and industrial pollutants. Besides, P. perna collected from all sites were severalfold more contaminated by FIB than seawater samples, primarily during the warm season of the study period. Biochemical and molecular analyses showed that isolated bacteria from both seawater and mussels were mainly potentially pathogenic species such as E. coli, Salmonella spp., Staphylococcus spp., Klebsiella spp., Pseudomonas spp., and Proteus spp.
Collapse
Affiliation(s)
- Mouna Boufafa
- Laboratory of Eco-biology for Marine Environment and Coastlines, Faculty of Science, Badji Moukhtar University, BP 12, 23000, Annaba, Algeria.
| | - Skander Kadri
- Laboratory of Eco-biology for Marine Environment and Coastlines, Faculty of Science, Badji Moukhtar University, BP 12, 23000, Annaba, Algeria
| | - Peter Redder
- Laboratoire de Microbiologie et Génétique Moléculaires, Centre de Biologie Intégrative, Université Paul Sabatier, 118 Route de Narbonne, 31062, Toulouse, France.
| | - Mourad Bensouilah
- Laboratory of Eco-biology for Marine Environment and Coastlines, Faculty of Science, Badji Moukhtar University, BP 12, 23000, Annaba, Algeria
| |
Collapse
|
3
|
Tumuhamye J, Steinsland H, Tumwine JK, Namugga O, Mukunya D, Bwanga F, Sommerfelt H, Nankabirwa V. Vaginal colonisation of women in labour with potentially pathogenic bacteria: a cross sectional study at three primary health care facilities in Central Uganda. BMC Infect Dis 2020; 20:98. [PMID: 32005177 PMCID: PMC6995194 DOI: 10.1186/s12879-020-4821-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 01/24/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Potentially pathogenic bacteria that colonise the lower genital tract of women in labour can be passed to the baby during birth. While many babies become colonised with these bacteria after delivery, a few develop neonatal infections. The lower genital tract is a reservoir for potential pathogens and a source of infection for neonates. We determined the prevalence of vaginal colonisation of potentially pathogenic bacteria among women in labour in Central Uganda and identified potential risk factors associated with this colonisation. METHODS We conducted a cross sectional study at three primary health care facilities and collected vaginal swabs from HIV-1 negative women in labour. Specimens were cultured on different selective microbiological media, and biochemical tests were used to classify bacterial isolates on the species level. Multivariable logistic regression analyses were used to estimate the association between relevant exposures and colonisation with potentially pathogenic bacteria. RESULTS We recruited 1472 women in labour whose mean age was 24.6 years (standard deviation [SD] 4.9). Of these, 955 (64.9%; 95% Confidence Interval [CI] 62.4, 67%) were vaginally colonised with at least one potentially pathogenic bacterial species. The most commonly isolated species were Escherichia coli (n = 508; 34.5%), Klebsiella pneumoniae (n = 144; 9.8%) and Staphylococcus aureus (n = 121; 8.2%). Results from exploratory multivariable regression analyses indicated that having had ≥5 previous pregnancies (adjusted odds ratio [aOR] 0.59; 95% CI 0.35, 0.97) or being ≥30 years old (aOR 1.52; 95% CI 1.03, 2.23) could be associated with vaginal colonisation with any potentially pathogenic bacteria, as well as with vaginal colonisation with S. aureus (aOR 0.33; 95% CI 0.12, 0.88, and aOR 2.17; 95% CI 1.17, 4.00, respectively). Possession of domestic animals in a household (aOR 0.57; 95% CI 0.35, 0.92) could be associated with vaginal colonisation with E. coli. CONCLUSIONS Two-thirds of HIV-1 negative women in labour were vaginally colonised by potentially pathogenic bacteria, mainly E. coli, K. pneumoniae, and S. aureus.
Collapse
Affiliation(s)
- Josephine Tumuhamye
- Centre for Intervention Science in Maternal and Child Health (CISMAC), Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway.
| | - Hans Steinsland
- CISMAC, Centre for International Health, Department of Global Public Health and Primary Care and Department of Biomedicine, University of Bergen, Bergen, Norway
| | - James K Tumwine
- Department of Paediatric and Child Health, Makerere University, Kampala, Uganda
| | - Olive Namugga
- CISMAC, Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - David Mukunya
- CISMAC, Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Freddie Bwanga
- Department of Immunology and Molecular Biology, Makerere University, Kampala, Uganda
| | - Halvor Sommerfelt
- CISMAC, Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Victoria Nankabirwa
- CISMAC, Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway.,Department of Epidemiology and Biostatics school of Public Health, Makerere University, Kampala, Uganda
| |
Collapse
|
4
|
Das A, Conti J, Hanrahan J, Kaelber DC. Comparison of keyboard colonization before and after use in an inpatient setting and the effect of keyboard covers. Am J Infect Control 2018; 46:474-476. [PMID: 29129271 DOI: 10.1016/j.ajic.2017.09.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 09/06/2017] [Accepted: 09/07/2017] [Indexed: 11/19/2022]
Abstract
Computer keyboards may contribute to patient infections. We cultured new keyboards, with/without keyboard covers, before placing them in adult inpatient rooms and recultured after 6 months. Nonpathogenic bacteria were present initially but potentially pathogenic bacteria were cultured only after use. Coagulase negative Staphylococcus colonization increased after use (P < .001). Keyboards with a cover had more potentially pathogenic bacteria (22% vs 16%), which although not significant statistically (P = .72), likely due to sample size, trended against covers offering protection.
Collapse
Affiliation(s)
- Anirudha Das
- Department of Neonatology, Cleveland Clinic Children's Hospital, Cleveland, OH; Center for Clinical Informatics Research and Education, The MetroHealth System, Case Western Reserve University, Cleveland, OH
| | - Jennifer Conti
- The Center for Quality, The MetroHealth System, Cleveland, OH
| | - Jennifer Hanrahan
- The Center for Quality, The MetroHealth System, Cleveland, OH; Department of Internal Medicine, The MetroHealth System, Case Western Reserve University, Cleveland, OH
| | - David C Kaelber
- Center for Clinical Informatics Research and Education, The MetroHealth System, Case Western Reserve University, Cleveland, OH; Department of Internal Medicine, The MetroHealth System, Case Western Reserve University, Cleveland, OH; Department of Pediatrics, The MetroHealth System, Case Western Reserve University, Cleveland, OH; Department of Population and Quantitative Health Sciences, The MetroHealth System, Case Western Reserve University, Cleveland, OH.
| |
Collapse
|
5
|
Paliaga P, Korlević M, Ivančić I, Najdek M. Limited influence of primary treated sewage waters on bacterial abundance, production and community composition in coastal seawaters. Mar Environ Res 2017; 131:215-226. [PMID: 29032852 DOI: 10.1016/j.marenvres.2017.09.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 09/12/2017] [Accepted: 09/14/2017] [Indexed: 06/07/2023]
Abstract
The response of bacteria in terms of abundance, production and community structure to changes induced by the discharge of primary treated sewage waters was investigated combining microbiological, chemical and molecular tools. The primary treatment did not affect substantially the bacterial community structure in wastewaters and did not reduce the concentrations of fecal indicators. The spatial distribution of the sewage plume was governed by vertical stratification and currents. Bacterial abundance and production in the sea receiving waste waters depended predominantly on environmental conditions. In the waters with the highest concentration of fecal pollution indicators the bacterial community was characterized by allochthonous bacteria belonging to Epsilonproteobacteria, Firmicutes, Gammaproteobacteria and Bacteroidetes. The latter two taxa were also present in unpolluted waters but had a different structure, typical for oligotrophic environments. Although the impact of primary treated sewage waters was limited, a sanitary risk persisted due to the relevant presence of potentially pathogenic bacteria.
Collapse
Affiliation(s)
- Paolo Paliaga
- Center for Marine Research, Ruđer Bošković Institute, G. Paliaga 5, 52210 Rovinj, Croatia.
| | - Marino Korlević
- Center for Marine Research, Ruđer Bošković Institute, G. Paliaga 5, 52210 Rovinj, Croatia.
| | - Ingrid Ivančić
- Center for Marine Research, Ruđer Bošković Institute, G. Paliaga 5, 52210 Rovinj, Croatia.
| | - Mirjana Najdek
- Center for Marine Research, Ruđer Bošković Institute, G. Paliaga 5, 52210 Rovinj, Croatia.
| |
Collapse
|
6
|
Ghaderpour A, Mohd Nasori KN, Chew LL, Chong VC, Thong KL, Chai LC. Detection of multiple potentially pathogenic bacteria in Matang mangrove estuaries, Malaysia. Mar Pollut Bull 2014; 83:324-330. [PMID: 24820641 DOI: 10.1016/j.marpolbul.2014.04.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 04/18/2014] [Accepted: 04/19/2014] [Indexed: 06/03/2023]
Abstract
The deltaic estuarine system of the Matang Mangrove Forest Reserve of Malaysia is a site where several human settlements and brackish water aquaculture have been established. Here, we evaluated the level of fecal indicator bacteria (FIB) and the presence of potentially pathogenic bacteria in the surface water and sediments. Higher levels of FIB were detected at downstream sampling sites from the fishing village, indicating it as a possible source of anthropogenic pollution to the estuary. Enterococci levels in the estuarine sediments were higher than in the surface water, while total coliforms and E. coli in the estuarine sediments were not detected in all samples. Also, various types of potentially pathogenic bacteria, including Klebsiella pneumoniae, Serratia marcescens and Enterobacter cloacae were isolated. The results indicate that the Matang estuarine system is contaminated with various types of potential human bacterial pathogens which might pose a health risk to the public.
Collapse
Affiliation(s)
- Aziz Ghaderpour
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; Institute of Ocean & Earth Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia; Laboratory of Biomedical Science and Molecular Microbiology, Institute of Graduate Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - Khairul Nazrin Mohd Nasori
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; Laboratory of Biomedical Science and Molecular Microbiology, Institute of Graduate Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - Li Lee Chew
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; Institute of Ocean & Earth Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Ving Ching Chong
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; Institute of Ocean & Earth Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Kwai Lin Thong
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; Institute of Ocean & Earth Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia; Laboratory of Biomedical Science and Molecular Microbiology, Institute of Graduate Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - Lay Ching Chai
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; Institute of Ocean & Earth Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia; Laboratory of Biomedical Science and Molecular Microbiology, Institute of Graduate Studies, University of Malaya, Kuala Lumpur, Malaysia.
| |
Collapse
|