Characterization and Whole Genome Sequencing of Chromobacterium violaceum OUAT_2017: A Zoonotic Pathogen Found Fatal to a Wild Asiatic Elephant

Sourav R. Hota, Soumesh K Padhi, Avishek Pahari, Bikash K. Behera, Biswaranjan Panda, Sunil K. Mor, Vikash K Singh, Sagar M Goyal, Niranjana Sahoo

Research output: Contribution to journalArticlepeer-review

Abstract

This study reports a rare fatal case of Chromobacterium violeceum OUAT_2017 strain infection in an Asiatic elephant calf in India. Necropsy revealed pus-filled nodules in liver, spleen, and lungs. Nutrient broth cultures of nodule content showed sediment of violet pigment whereas smooth, non-diffusible, violet-pigmented, homogeneous colonies appeared on nutrient agar. The organism was found to be non-haemolytic and resistant to 8 of the 24 antibiotics tested in vitro. Partial 16S rRNA gene sequence measuring 1410 bp revealed 97% homology with C. violeceum. The bacterial genome composed of 64.87% of G + C content with total size of 4,681,202 bp. The genome annotation has 42 genes responsible for multidrug antibiotic resistance with the presence of Aminoglycoside-modifying enzymes (AAC (6’)) that targets streptomycin and spectinomycin. Our findings corroborated the lethal effect of C. violeceum in a new host (elephant) that enriched scientific information on epidemiological picture and whole genome sequencing as well.

Original languageEnglish (US)
JournalIndian Journal of Microbiology
DOIs
StateAccepted/In press - 2022

Bibliographical note

Funding Information:
This study was supported by the officers, Department of Forests and Environment, Government of Odisha working in the concerned area.

Publisher Copyright:
© 2022, Association of Microbiologists of India.

Keywords

  • Chromobacterium violaceum
  • Elephant
  • Whole genome sequencing
  • Zoonotic disease

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