Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Review
. 2023 Dec 20:14:1213953.
doi: 10.3389/fmicb.2023.1213953. eCollection 2023.

A review of the literature of Listeria monocytogenes in Africa highlights breast milk as an overlooked human source

Affiliations
Review

A review of the literature of Listeria monocytogenes in Africa highlights breast milk as an overlooked human source

Marièma Sarr et al. Front Microbiol. .

Abstract

According to the latest WHO estimates (2015) of the global burden of foodborne diseases, Listeria monocytogenes is responsible for one of the most serious foodborne infections and commonly results in severe clinical outcomes. The 2013 French MONALISA prospective cohort identified that women born in Africa has a 3-fold increase in the risk of maternal neonatal listeriosis. One of the largest L. monocytogenes outbreaks occurred in South Africa in 2017-2018 with over 1,000 cases. Moreover, recent findings identified L. monocytogenes in human breast milk in Mali and Senegal with its relative abundance positively correlated with severe acute malnutrition. These observations suggest that the carriage of L. monocytogenes in Africa should be further explored, starting with the existing literature. For that purpose, we searched the peer-reviewed and grey literature published dating back to 1926 to date using six databases. Ultimately, 225 articles were included in this review. We highlighted that L. monocytogenes is detected in various sample types including environmental samples, food samples as well as animal and human samples. These studies were mostly conducted in five east African countries, four west African countries, four north African countries, and two Southern African countries. Moreover, only ≈ 0.2% of the Listeria monocytogenes genomes available on NCBI were obtained from African samples, contracted with its detection. The pangenome resulting from the African Listeria monocytogenes samples revealed three clusters including two from South-African strains as well as one consisting of the strains isolated from breast milk in Mali and Senegal and, a vaginal post-miscarriage sample. This suggests there was a clonal complex circulating in Mali and Senegal. As this clone has not been associated to infections, further studies should be conducted to confirm its circulation in the region and explore its association with foodborne infections. Moreover, it is apparent that more resources should be allocated to the detection of L. monocytogenes as only 15/54 countries have reported its detection in the literature. It seems paramount to map the presence and carriage of L. monocytogenes in all African countries to prevent listeriosis outbreaks and the related miscarriages and confirm its association with severe acute malnutrition.

Keywords: Africa; Listeria monocytogenes; animal; environment; food; human; treatment.

PubMed Disclaimer

Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
Selection of articles using different search engines and exclusion criteria.
Figure 2
Figure 2
Pangenome analysis of African Listeria strains genome sequences.
Figure 3
Figure 3
Distribution of Listeria monocytogenes in Africa.

Similar articles

Cited by

References

    1. Adeshina I., Adewale Y. A. (2015). Preliminary studies on the prevalence of Listeria monocytogenes in Clarias gariepinus and Orechromis niloticus in Ibadan, Oyo state. J. Agricul. Res. Develop. 14:45. doi: 10.4314/jard.v14i1.5 - DOI
    1. Adetunji V. O., Adegoke G. O. (2008). Formation of biofilm by strains of Listeria monocytogenes isolated from soft cheese “wara” and its processing environment. African J. Biotechnol.
    1. Adetunji V. O., Adesokan H. K., Agada C. A., Isola TO (2014). Bacterial load and antimicrobial profile of Escherichia coli and Listeria spp. isolates from muscle tissues of slaughtered cattle at a major abattoir in Ibadan, South-Western Nigeria. J. Basic App. Sci. 10, 299–305. doi: 10.6000/1927-5129.2014.10.39 - DOI
    1. Adetunji V. O., Isola T. O. (2011). Antibiotic resistance of Escherichia coli, Listeria and Salmonella isolates from retail meat tables in Ibadan municipal abattoir, Nigeria. Afr. J. Biotechnol. 10, 224–228. doi: 10.3923/pjn.2011.224.228 - DOI
    1. Ahmed H. A., Hussein M. A., El-Ashram A. M. (2013). Seafood a potential source of some zoonotic bacteria in Zagazig, Egypt, with the molecular detection of Listeria monocytogenes virulence genes. Vet. Ital. 49, 299–308. doi: 10.12834/VetIt.1305.05, PMID: - DOI - PubMed

Grants and funding

This study has received financial support from the French Government through the Agence Nationale pour la Recherche (ANR), including the “Programme d’Investissement d’Avenir” under the reference Méditerranée Infection 10-IAHU-03.