Phenotypic differences between Lactococcus garvieae isolates obtained from rainbow trout farms in Turkey

Önalan Ş., Arabacı M., Çağırgan H.

Pakistan Journal Of Zoology, vol.52, no.5, pp.1771-1777, 2020 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 52 Issue: 5
  • Publication Date: 2020
  • Journal Name: Pakistan Journal Of Zoology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Agricultural & Environmental Science Database, Animal Behavior Abstracts, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Environment Index, Geobase, Veterinary Science Database
  • Page Numbers: pp.1771-1777
  • Van Yüzüncü Yıl University Affiliated: Yes


Lactococcus garvieae is one of the main pathogenic agents in rainbow trout farms in Turkey. Twenty-
two L. garvieae isolates obtained from different regions in Turkey were evaluated phenotypically in the
study. In all isolates, cream colored, bright, round and S-type colonies with smooth margins were seen
in TSA medium. They were alive during native examination without movement. It was observed that
morphologically all isolates were Gram (+), α-hemolytic (BA), oxidase and catalase negative and were
reproduced under 21, 37 and 45 °C temperatures with 0–6.5 % NaCl salinity. As a result of the examination
of biochemical properties with API Rapid ID 32 Strep test, it was observed that 2 L. garvieae isolates were
different from other isolates in respect of sucrose utilization. 1 and 19 number isolates were negative for
sucrose whereas other isolates gave positive results. 1 number isolate was different from other isolates
based on maltose profile. While isolate 22 was maltose negative, the other isolates gave positive results.
According to phenotypic differences, all isolates used in the study were classified as three different groups.