Salmonella serovars and their distribution in Nigerian commercial chicken layer farms

Abstract

Commercial poultry farms (n° 523), located in all the six regions of Nigeria were sampled with a view to generate baseline information about the distribution of Salmonella serovars in this country. Five different matrices (litter, dust, faeces, feed and water) were collected from each visited farm. Salmonella was isolated from at least one of the five matrices in 228 farms, with a farm prevalence of 43.6% (CI95[39.7–48.3%]). Altogether, 370 of 2615 samples collected (14.1%, CI95[12.8; 15.5%]) contained Salmonella. Considering the number of positive farms and the number of positive samples, it was evident that for the majority of the sampled farms, few samples were positive for Salmonella. With regard to the matrices, there was no difference in Salmonella prevalence among the five matrices considered. Of the 370 isolates serotyped, eighty-two different serotypes were identified and Salmonella Kentucky was identified as having the highest isolation rate in all the matrices sampled (16.2%), followed by S. Poona and S. Elisabethville. S. Kentucky was distributed across the country, whereas the other less frequent serovars had a more circumscribed diffusion. This is one of few comprehensive studies on the occurrence and distribution of Salmonella in commercial chicken layer farms from all the six regions of Nigeria. The relatively high prevalence rate documented in this study may be attributed to the generally poor infrastructure and low biosecurity measures in controlling stray animals, rodents and humans. Data collected could be valuable for instituting effective intervention strategies for Salmonella control in Nigeria and also in other developing countries with a similar poultry industry structure, with the final aim of reducing Salmonella spread in animals and ultimately in humans.

Diversity and Distribution of <i>Salmonella</i> Isolated from Poultry Offal in Niger (West Africa)

“…Contrarily to our results, in Nigeria, the most predominant isolated serotypes of poultry were S. Kentucky (16.2%), S. Poona (5.66%), S. Elizabethville (4.04%) and Larochelle/S. Agama (3.77%) [23]. In Chad, the most frequent isolated laying chicken and pulpit chicken were S. Colindale (19%) followed by S. Minnesota (18%) S. Havana and S. Riggil (6% each), S. Kottbus and S. Amager (4.7%), S. Idikan, S. Mississippi and S. Muenchen (3.6%) [24].…”

Salmonella spp. and Campylobacter spp. in poultry feces and carcasses in Ouagadougou, Burkina Faso

“…In Nigeria, Fagbamila et al. () reported NTS in 43.6% of poultry feces. Among the above‐mentioned counties, Burkina Faso is the poorest nation.…”

Salmonella enterica isolated from selected poultry farms in Kwara State, Nigeria between 2015 and 2016 showed resistance to critical antimicrobials

“…Isolation and identification of Salmonella were done according to ISO 6579, as previously described (Fagbamila et al, 2017, Ahmed et al, 2016. All the presumptive Salmonella isolates 58 Laboratory, Ltd., Bangkok, Thailand) and serotypes were assigned according to the Kauffmann-White scheme as previously described by Raufu et al (2013).…”