Prevalence and diversity of Salmonella enterica in water, fish and lettuce in Ouagadougou, Burkina Faso

BMC Microbiology

Kaisa Haukka²  Nicolas Barro³  Alfred S Traoré³  Isidore Juste O Bonkoungou¹  Anja Siitonen⁴  Outi Nyholm⁴  Oumar Traoré⁴ 

[1]Laboratoire National de Santé Publique, Ouagadougou 09, Burkina Faso

[2]Department of Food and Environmental Sciences, University of Helsinki, Helsinki, FI-00014, Finland

[3]Laboratoire de Biologie Moléculaire d’Epidémiologie et de Surveillance des bactéries et virus transmis par les aliments, CRSBAN/Département de Biochimie-Microbiologie, UFR SVT-Université de Ouagadougou, Ouagadougou 03, Burkina Faso

[4]Bacteriology Unit, Department of Infectious Disease Surveillance and Control, National Institute for Health and Welfare (THL), Helsinki, FI-00271, Finland

关键词: Antimicrobials;    Lettuce;    Fish;    Water;    Serotypes;    Salmonella;   

Others  :  1227611
DOI  :  10.1186/s12866-015-0484-7

 received in 2015-01-29, accepted in 2015-07-13,  发布年份 2015

【 摘 要 】

Background

This study investigated the prevalence, serotypes and antimicrobial sensitivity patterns of Salmonella enterica in environment in Ouagadougou, Burkina Faso. A total of 476 samples, consisting of 36 samples of tap water, 51 samples of well water, 87 samples of channel water, 44 samples of reservoir water, 238 samples of fish, and 20 samples of lettuce were examined using standard bacteriological procedures for Salmonella.

Results

Salmonella were isolated from 98 samples. Salmonella were rare in drinking water, since they were not found at all from the tap water, and only in 2 % of well water. Salmonella were more common in the water of reservoir of Tanghin (15 %), reservoir of Yamtenga (20 %), and in the water channels in the city (from 20 to 31 %). Salmonella were commonly isolated from the fish (24 %) caught from the reservoir of Tanghin and from the lettuce (50 %) irrigated with water from Tanghin. The Salmonella isolates were found to represent 50 different serotypes. The 11 most common serotypes were Salmonella Bredeney and S. Colindale (both 8.2 %), S. Muenster (6.1 %), S. Korlebu (5.1 %), S. Eastbourne and S. Poona (both 4.1 %), and S. Agona, S. Derby, S. Drac, S. Senftenberg, S. Waycross (each 3.1 %), accounting for 51.3 % of all the isolates. In general, the Salmonella strains were sensitive to the antimicrobials tested, but two strains were resistant to streptomycin and many more intermediate to streptomycin or sulphonamide.

Conclusion

This study highlights the common prevalence of Salmonella and the high diversity of Salmonella serotypes in aquatic environment in Ouagadougou, Burkina Faso. Therefore, various human activities linked to water and consumption of water-related products, such as fish and lettuce, can lead to human Salmonella infections.

【 授权许可】

   
2015 Traoré et al.

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