Occurrence of Listeria monocytogenes (LM) and associated factors affecting its distribution
in Oyo state, Nigeria was investigated in 2016.
A total number of 972 (756 fish organs, 108 water and 108 sediments)
samples were collected and examined for LM using molecular method. Descriptive
statistics, t-test, Manny-Whitney U test and ANOVA were employed to analysed
the data generated. It was found out, among other that 61 out of 972
samples had listeria infection. Forest zone had higher percentage of infection
(66.67%) than the derived savannah zone (25.93%). However, there was no
significant difference in LM occurrence between the sexes (p=0.333) of the fish.
Although, there was significant difference in body weight (p=0.005). Out
of 61 biochemically characterized isolates, only 18(29.51%) using iap primer and 12(19.67%) using hly-A primer were confirmed to be L. monocytogenes by PCR method. There was
significant difference in the occurrence of L.
monocytogenes in organs (p=0.001) with the spleen having the highest
occurrence. Thus, the study concluded that LM was well distributed in fish farms in the ecological zones. Also,
the highest occurrence was observed in forest zone revealing body weight and
fish length as possible predisposing factors.
Primary Language | English |
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Journal Section | Research Article |
Authors | |
Publication Date | December 26, 2018 |
Published in Issue | Year 2018 Volume: 12 Issue: 3 |