Characterisation of Streptococcus suis Isolates in the Czech Republic Collected from Diseased Pigs in the Years 2018-2022

As in other countries, in the Czech Republic, infection in pigs is considered an economically significant disease for the pig industry, though little is known about its population structure. We collected isolates from 144 farms in the years 2018-2022. All samples were taken from animals suffering fr...

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Bibliographic Details
Published in:Pathogens (Basel) 2022-12, Vol.12 (1), p.5
Main Authors: Zouharová, Monika, Šimek, Bronislav, Gebauer, Jan, Králová, Natálie, Kucharovičová, Ivana, Plodková, Hana, Pecka, Tomáš, Brychta, Marek, Švejdová, Marie, Nedbalcová, Kateřina, Matiašková, Katarína, Matiašovic, Ján
Format: Article
Language:English
Subjects:
Central nervous system
Farms
Genes
Genomics
Hogs
Meningitis
Methods
Pathogens
pathotype
Population structure
sequence type
Serology
serotype
Serotypes
Serotyping
Signs and symptoms
Streptococcus suis
Swine
Virulence
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Summary:As in other countries, in the Czech Republic, infection in pigs is considered an economically significant disease for the pig industry, though little is known about its population structure. We collected isolates from 144 farms in the years 2018-2022. All samples were taken from animals suffering from symptoms indicating possible infection. Serotyping revealed the presence of 23 different serotypes, and 18.94% were non-typable strains. The most common was S7 (14.96%), while other serotypes had frequencies of less than 10%. Sequence typing identified 56 different sequence types, including 31 newly assigned sequence types together with 41 new alleles in genes in the MLST schema. A large portion of isolates (25.70%) were of unknown sequence type. The most common sequence types were ST29 (14.77%) and ST28 (10.04%); the other sequence types had frequencies of less than 10%. In total, 100 different combinations of serotypes and sequence types were identified. Among them, S7ST29 was found in 72 isolates, representing 13.63% of all isolates, and was significantly associated with the central nervous system. Many other isolates of particular serotype and sequence type combinations were found in a few cases, and a number of isolates were non-typable.
ISSN:2076-0817
2076-0817
DOI:10.3390/pathogens12010005