| Autor: |
Šteingolde, Žanete, Meistere, Irēna, Avsejenko, Jeļena, Streikiša, Madara, Ķibilds, Juris, Alksne, Laura, Gradovska, Silva, Tītmane, Lelde, Vanaga, Aīda, Terentjeva, Margarita, Bērziņš, Aivars |
| Zdroj: |
Animals, Health, Food Hygiene: International Scientific Conference Proceedings; 2019, p32-33, 2p |
| Abstrakt: |
Listeria monocytogenes (L.m.) is widespread in the environment and affects both humans and animals, most frequently farm ruminants by causing different clinical manifestations, usually abortions, septicemia, encephalitis, mastitis and sometimes conjunctivitis. Animals can be asymptomatic carriers and spread pathogen in the environment. The aim of this study was to determine and describe the genetic diversity of L.m. isolated from clinical farm ruminant listeriosis cases and farm environment. A total of 154 L.m. isolates were collected from 2013 to 2019. Overall, 133 isolates were associated with cattle and sheep listeriosis clinical cases including abortions, mastitis, and 21 isolates were from farm environment. L.m. serogroup IIa (92.2%) was predominant, but serogroups IIc (3.9%) and IVb (3.9%) were also observed. None of the isolates belonged to serogroup IIb. Overall, 28 different sequence types (ST) were detected among animal and environment isolates, demonstrating a wide L.m. genetic diversity. The source of the isolate, either animal or environment, was not significantly associated with a certain serogroup or ST. In few cases, L.m. isolates of sequence types ST 1, ST 2, ST 4, ST 6 and ST 194 were detected and belonged to hypervirulent serogroup IVb, which is usually associated with severe foodborne listeriosis outbreaks in humans. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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