Microbiological hazard identification and exposure assessment of food prepared and served in rural households of Lungwena, Malawi

Int J Food Microbiol. 2008 Jul 15;125(2):111-6. doi: 10.1016/j.ijfoodmicro.2008.02.025. Epub 2008 Mar 4.

Abstract

The presence of food-borne pathogens, Escherichia coli 0157:H7, Staphylococcus aureus, Salmonella species, Campylobacter jejuni and non-pathogenic E. coli, in 132 home cooked food samples consisting of maize flour porridge (MFP), (n=41), fish (n=37), vegetables (n=28), beans (n=13) and "Others" (n=13), collected from 6 villages in Lungwena, Malawi was investigated. It was found that 35% of the food samples were contaminated with one or more pathogens; with 48%, 8%, 61% and 23% of the food samples being found to harbour E. coli, pathogenic E. coli 0157: H7, S aureus and Salmonella species, respectively. C. jejuni was not detected in any food sample. Using a 95% level of significance, pathogen concentration among food categories demonstrated a statistical difference (p=0.001). Distribution of pathogens among villages was also found to be significant (p=0.03). MFP was the most contaminated food. Practices that promote the spread of the pathogens in the rural household kitchens were investigated. Food was thought to be contaminated as a result of poor food handling, preparation and storage practices.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Colony Count, Microbial
  • Consumer Product Safety
  • Escherichia coli O157 / isolation & purification*
  • Food Analysis
  • Food Contamination / analysis*
  • Food Handling / methods*
  • Food Microbiology
  • Food Preservation / methods
  • Humans
  • Hygiene
  • Malawi
  • Risk Assessment*
  • Salmonella / isolation & purification*
  • Staphylococcus aureus / isolation & purification*