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Characteristic and susceptibility to enterocins of enterococci in pheasants possessing virulence factor genes

100%
Kandricakova A., Laukova A., Strompfova V.
Polish Journal of Veterinary Sciences
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2015
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tom 18
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nr 3
With an increasing number of pheasants as gamebirds being reared each year, these species are becoming a more prominent part of the workload of many veterinary practices. Only limited information can be found concerning the microflora of common pheasants. A significant part of the obligate microflora consists of lactic acid bacteria, including enterococci. In this study, faeces were sampled from 60 pheasants aged 16-17 weeks. Enterococcal counts reached 5.48±1.9 (log10) CFU/g. Strains (17) were taxonomically classified to the genus Enterococcus using the Maldi-Tof identification system; they were allotted to the species E. hirae (58.8%), E. faecium (23.5%) and E. faecalis (17.7%) by highly probable species identification or by secure genus identification/probable species identication. Species allocation was also confirmed using conventional biochemical tests. Most strains formed β-hemolysis. Gelatinase active phenotype was found in three E. faecalis strains. Enterococci were β-glucuronidase negative, mostly trypsin negative with slight or moderate production of α-chymotrypsin. EH52b and EF42 strains possessed the highest potential for pathogenicity. Average value of lactic acid was 1.78±0.33 mmo/L. Most strains were tetracycline resistant (82.4%). Polyresistant E. faecalis strains with positive gelatinase phenotype and possessing virulence factor genes confirmed using PCR (gelE, efaAfs, ccf cob, cpd) were sensitive to enterocins (activity 1600-25 600 AU/mL).
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Assessment of biofilm formation by faecal strains of Enterococcus hirae from different species of animals

100%
Bino E., Laukova A., Kandricakova A., Nemcova R.
Polish Journal of Veterinary Sciences
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2018
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tom 21
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nr 4
3

Staphylococcal species detected in free-living trouts of East Slovakian water sources and their relation to antimicrobials

76%
Laukova A., Kandricakova A., Strompfova V., Chacornac J. P., Leroy S., Zitnan R.
Bulletin of the Veterinary Institute in Puławy
|
2013
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tom 57
|
nr 2
The aim of the study was to isolate and identify staphylococci from the intestinal samples of 24 trouts from East Slovakian waters. Moreover, their relation to antimicrobials was tested. The count of staphylococci in the trouts reached in average 4.0 × 10¹ colony forming units per gram. Twenty-two strains were identified by validated species-specific oligonucleotide array targeting the manganese-dependent superoxide dismutase-sodA gene. The identified strains were allotted to five species (Staphylococcus warnen, S. haemolyticus, S. epidermidis, S. hominis, S. pasteuri) clustered to three groups according to 16S rRNA sequences (S. epidermidis group, S. haemolyticus group, S. warneri group). These species belong to coagulase-negative staphylococci. All strains were sensitive to eight antibiotics out of 14 tested; the majority of strains were also sensitive to the remaining six antibiotics with the inhibitory zones from 13 to 41 mm. The strains were also sensitive at least to three enterocins of nine tested. Strains SW24/2, SHo 19/2, SHo20/l, SP19/1 were sensitive to eight of nine enterocins. All strains were sensitive to Ent A, P=EK13, and Ent EM41 with activity 100-6400 AU/mL. Strains SHo19/2 and SP19/1 were sensitive to Ent 2019 with activity up to 25600 AU/mL.
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