Microbial Contamination in Vegetables at the Farm Gate Due to Irrigation with Wastewater in the Tamale Metropolis of Northern GhanaReportar como inadecuado




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The rational for this studywas to assess the microbial quality of fresh vegetables at the farm gate of theWater Works road vegetable farm at Gumbihini in the Tamale Metropolis. A totalof thirty-six 36 vegetables comprising lettuce, amarantus and cabbages andeight 8 wastewater samples were collected at random and analysed for a periodof four months, to assess the microbial contamination level. Samples wereanalysed for total coliforms, faecal coliforms, E. coli and helminthes eggs. All vegetables sampled during thestudy period recorded high levels of total and faecal coliform bacteria. Meanfaecal coliforms for the various vegetables were as follows; lettuce 3.7 ± 0.5 CFU.g-1, amarantus 3.5 ± 0.6 CFU.g-1 and cabbage 3.1 ± 0.6 log CFU.g-1 fresh weight. FC levelswere above the International Commission on Microbiological Specifications for Foods ICMSF recommendedlevel of 3 log CFU.g-1 fresh weight. E. coli were recorded in lettuce 3.3 ± 0.6 log CFU.g-1 fresh weight andamarantus 0.6 ± 0.1 log CFU.g-1 freshweight but not in cabbages. Lettuce generally recorded high levels ofmicrobial contamination because of the large surface area occupied by itsleaves. Two helminth eggs Strongiloides stercoralis were identified in lettuce whilefour Ascaris lumbricoides wereidentified in wastewater. Microbial loads recorded in wastewater were generallyhigher than that of vegetables. Since most of these vegetables are eaten freshor slightly cooked, there is course for concern as public health will beadversely affected. Education of farmers and consumers on food safety has to beintensified to avert a possible outbreak.



KEYWORDS

Helminthes; Faecal Coliform; Irrigation Water; Vegetables; E. coli

Cite this paper

S. Cobbina, M. Kotochi, J. Korese and M. Akrong -Microbial Contamination in Vegetables at the Farm Gate Due to Irrigation with Wastewater in the Tamale Metropolis of Northern Ghana,- Journal of Environmental Protection, Vol. 4 No. 7, 2013, pp. 676-682. doi: 10.4236-jep.2013.47078.





Autor: Samuel Jerry Cobbina, Mohammed Clement Kotochi, Joseph Kudadam Korese, Mark Osa Akrong

Fuente: http://www.scirp.org/



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