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Article

Detection of Various Streptococcus spp. and Their Antimicrobial Resistance Patterns in Clinical Specimens from Austrian Swine Stocks

1
University Clinic for Swine, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine, 1210 Vienna, Austria
2
Department for Pathobiology, Institute of Microbiology, University of Veterinary Medicine, 1210 Vienna, Austria
3
Unit of Veterinary Public Health and Epidemiology, Department for Farm Animals and Veterinary Public Health, Institute of Food Safety, Food Technology and Veterinary Public Health, University of Veterinary Medicine, 1210 Vienna, Austria
*
Author to whom correspondence should be addressed.
Received: 31 October 2020 / Revised: 29 November 2020 / Accepted: 9 December 2020 / Published: 11 December 2020
(This article belongs to the Special Issue Antimicrobial Resistance: The Final Frontier)
Knowledge of pathogenic potential, frequency and antimicrobial resistance patterns of porcine Streptococcus (S.) spp. other than S. suis is scarce. Between 2016 and 2020, altogether 553 S. spp. isolates were recovered from clinical specimens taken from Austrian swine stocks and submitted for routine microbiological examination. Antimicrobial susceptibility testing towards eight antimicrobial substances was performed using disk diffusion test. All isolates from skin lesions belonged to the species S. dysgalactiae subspecies equisimilis (SDSE). S. hyovaginalis was mainly isolated from the upper respiratory tract (15/19) and S. thoraltensis from the genitourinary tract (11/15). The majority of S. suis isolates were resistant to tetracycline (66%), clindamycin (62%) and erythromycin (58%). S. suis isolates from the joints had the highest resistance rates. S. suis and SDSE isolates resistant to tetracycline were more likely to be resistant to erythromycin and clindamycin (p < 0.01). Results show that different species of Streptococcus tend to occur in specific body sites. Nevertheless, a statement whether these species are colonizers or potential pathogens cannot be given so far. High resistance rates of S. suis towards tetracyclines and erythromycin and high recovery rates of S. suis from lung tissue should be considered when treating pigs with respiratory diseases. View Full-Text
Keywords: swine; Streptococcus; SDSE; S. hyovaginalis; S. thoraltensis; resistance; tetracyclines swine; Streptococcus; SDSE; S. hyovaginalis; S. thoraltensis; resistance; tetracyclines
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MDPI and ACS Style

Renzhammer, R.; Loncaric, I.; Ladstätter, M.; Pinior, B.; Roch, F.-F.; Spergser, J.; Ladinig, A.; Unterweger, C. Detection of Various Streptococcus spp. and Their Antimicrobial Resistance Patterns in Clinical Specimens from Austrian Swine Stocks. Antibiotics 2020, 9, 893. https://0-doi-org.brum.beds.ac.uk/10.3390/antibiotics9120893

AMA Style

Renzhammer R, Loncaric I, Ladstätter M, Pinior B, Roch F-F, Spergser J, Ladinig A, Unterweger C. Detection of Various Streptococcus spp. and Their Antimicrobial Resistance Patterns in Clinical Specimens from Austrian Swine Stocks. Antibiotics. 2020; 9(12):893. https://0-doi-org.brum.beds.ac.uk/10.3390/antibiotics9120893

Chicago/Turabian Style

Renzhammer, René, Igor Loncaric, Marisa Ladstätter, Beate Pinior, Franz-Ferdinand Roch, Joachim Spergser, Andrea Ladinig, and Christine Unterweger. 2020. "Detection of Various Streptococcus spp. and Their Antimicrobial Resistance Patterns in Clinical Specimens from Austrian Swine Stocks" Antibiotics 9, no. 12: 893. https://0-doi-org.brum.beds.ac.uk/10.3390/antibiotics9120893

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