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Seroprevalence and Genome Analysis of Brucella in Wild Boars (Sus scrofa) in Bavaria, Germany, 2019 to 2021

ABSTRACT: Brucella in Wild Boar Bavaria

PROVIDER: PRJEB55696 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR10144286_1.fastq.gz	Fastqsanger.gz
	ERR10144286_2.fastq.gz	Fastqsanger.gz
	ERR10144287_1.fastq.gz	Fastqsanger.gz
	ERR10144287_2.fastq.gz	Fastqsanger.gz
	ERR10144288_1.fastq.gz	Fastqsanger.gz

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Seroprevalence of Brucella Infection in Wild Boars (Sus scrofa) of Bavaria, Germany, 2019 to 2021 and Associated Genome Analysis of Five B. suis Biovar 2 Isolates.

Project description:Brucella species are highly pathogenic zoonotic agents and are found in vertebrates all over the world. To date, Germany is officially declared free from brucellosis and continuous surveillance is currently limited to farm ruminants. However, porcine brucellosis, mostly caused by B. suis biovar 2, is still found in wild boars and hares. In the present study, a three-year monitoring program was conducted focusing on the wild boar population in the state of Bavaria. Serologic screening of 11,956 animals and a direct pathogen detection approach, including a subset of 681 tissue samples, was carried out. The serologic incidence was 17.9%, which is in approximate accordance with previously published results from various European countries. Applying comparative whole genome analysis, five isolated B. suis biovar 2 strains from Bavaria could be assigned to three known European genetic lineages. One isolate was closely related to another strain recovered in Germany in 2006. Concluding, porcine brucellosis is endemic in Bavaria and the wild boar population represents a reservoir for genetically distinct B. suis biovar 2 strains. However, the transmission risk of swine brucellosis to humans and farm animals is still regarded as minor due to low zoonotic potential, awareness, and biosafety measures.

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Molecular investigation for bacterial and protozoan tick-borne pathogens in wild boars (Sus scrofa) from southern Germany.

Project description:Wild boars (Sus scrofa) have been suggested to be involved in the enzootic cycle of the tick-borne pathogen Anaplasma phagocytophilum. This observation raises the question whether they serve as reservoir hosts for A. phagocytophilum and potentially for other tick-borne pathogens of public health relevance. The aim of this study was to investigate wild boars and their ticks from a forest site in southern Germany for the presence of A. phagocytophilum, Candidatus Neoehrlichia mikurensis, Rickettsia spp., Borrelia burgdorferi sensu lato (s.l.), Borrelia spp. of the relapsing fever group, and Babesia spp. Therefore, 24 wild boars collected from October, 2010, to February, 2013, were investigated by molecular methods. DNA of A. phagocytophilum was detected in three out of 24 (12.5%) wild boars and in four out of 16 (25%) ticks. DNA of none of the other pathogens was found in any wild boar, but Rickettsia spp., B. burgdorferi s.l., and Cand. N. mikurensis were found in one of the investigated ticks each. Sequences of the partial 16S rRNA gene of A. phagocytophilum from one spleen and two ticks showed 100% similarity to GenBank entries from human anaplasmosis cases (accession nos. U02521 and AY886761). The sequence from the third tick was 100% similar to sequences obtained from Ixodes ricinus and roe deer from the same study area previously. Detecting a potentially human pathogenic A. phagocytophilum variant in wild boar confirms previous findings and is of public health interest. To our knowledge, this is the first report of A. phagocytophilum in wild boars in Germany. Whether wild boars support the enzootic cycle of A. phagocytophilum variants involved in human disease requires further attention in future systematic studies.

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