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Fresh produce imported by Qatar are mostly sold at the wholesale produce market (WPM) located in open-air and near major animal markets and slaughterhouses. This study was the first in Qatar to monitor the effect of environmental conditions on the microbial quality and safety of fresh produce sold at the WPM over 1 year. The monitoring involved the collection of 540 produce samples along with samples of air, soil, and surface swabs. Samples were analyzed for total aerobic bacteria (TAB); generic  Listeria  spp.,  Staphylococcus  spp.,  Salmonella  spp.; total coliforms and total fungi. Bacterial and fungal isolates were identified using 16S rRNA/ITS rRNA markers. Environmental/sanitary factors significantly impacted the prevalence of microorganisms in all samples tested. Produce quality was rated ‘poor’ during the months of November–February or May–August, with TAB and coliform counts exceeding 6 and 4 log 10  CFU/g, respectively.  Bacillus subtilus, Enterobacter cloacae, E. faecium, P. expansium, P. aurantiocandidum , and  A. niger  were the most abundant species with prevalence rate of 11–30%. The high microbial load of environmental samples indicates that the location of the WPM near livestock markets is likely impacting the microbial quality of fresh produce. Therefore, effective control measures need to be implemented at WPM to improve produce safety yearlong.

Monitoring the effect of environmental conditions on safety of fresh produce sold in Qatar’s wholesale market