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A sero-prevalence study of Infectious Bronchitis Virus (IBV) among some species of poultry (village chickens, broilers, layers, turkeys, ducks and geese) in Maiduguri Metropolis was conducted using Enzyme linked immunosorbent assay. An overall prevalence of 26.6% was observed in the study. The species distribution of the positive samples showed 5/18 (27.8%) broilers, 9/48 (18.8%) village chicken, 12/40 (30%) turkeys, 4/29 (13.8%) ducks, 6/23 (26.1%) geese and 14/30 (46.7%) layers were sero-positive to IBV antibodies. The sex distribution of the IBV positive samples revealed significant difference (p<0.05) between male and females. The sero-prevalence of IBV based on management system showed a significant difference (p<0.05) among those birds managed under intensive system (39.5%), semi-intensive (23.9%) and free range (18.7%) system. In conclusion, there is prevalence of IBV in the study area and the virus has a wide spread distribution amongst poultry species within the study area. [ABSTRACT FROM AUTHOR]

A total of three hundred and fifty (350) samples of meat (Beef, Sheep, Goat, and Chicken) and vegetables (Cabbage, Carrot, Cucumber, Spinach and Lettuce) were purchased from retailers' in Central abattoir and markets with surface swabs taken from butchers tables in Maiduguri, Nigeria were analyzed for Listeria species. Listeria species were recovered from the entire samples examined with the highest isolates observed in surface swab (100%), cucumber (81.3%) and beef (74.0%) respectively, followed by lettuce (73.3%), carrot (70.0%) and cabbage (65.4%). The least isolates were observed in goat (36.0%). Listeria species isolates was found in (60.9%) of the Meat and surface swab and (69.2%) of the Vegetable samples analyzed. Gram stain and Biochemical characterization of the Listeria isolates showed that L. seeligeri as the highest distributed , followed by L. ivannovii, L.welshimeri and L.innocua, while the least Listeria specie isolates distribution was observed in L. monocytogenes. The study therefore confirmed that there is a high distribution rate of Listeria species in the meat and vegetables retailed in the markets and central abattoir ,including surface swab of butchers table which may have resulted from fecal contamination during slaughtering, unhygienic and unsanitary practices. [ABSTRACT FROM AUTHOR]