For the study, 14 samples were selected and purchased from different markets. From microbial analysis resulted the presence of both pathogens.
The authors conclude highlighting the need of microbial quality evaluation of fresh vegetables to reduce their contamination.
Source: Odu Ngozi Nma, Okomuda Mary Oruese, "Prevalence of Salmonella species and Escherichia coli in fresh Cabbage and Lettuce sold in Port Harcourt Metropolis, Nigeria", Report and Opinion, 2013, 5(3):1-8. http://www.sciencepub.net/report/report0503/001_16368report0503_1_8.pdf