Mycobacterium fortuitum abortion in a sow

Allysa L Cole, Natalie M Kirk, Leyi Wang, Chien-Che Hung, Jonathan P Samuelson

Research output: Contribution to journalArticlepeer-review

Abstract

Two aborted Chester White pig fetuses were presented to a veterinary diagnostic laboratory in Illinois. Postmortem examination identified no gross abnormalities. Histologic evaluation revealed multifocal necrosis of chorionic epithelial cells, coalescing areas of mineralization in the placenta, and focal accumulations of viable and degenerate neutrophils in the lung. Intra- and extracellular acid-fast bacilli were identified in the lesions in both the placenta and lungs. Bacterial culture of stomach contents yielded heavy growth of Mycobacterium fortuitum, a rapidly growing nontuberculous mycobacterium (NTM), which was further confirmed through whole-genome sequencing. NTM are opportunistic pathogens commonly found in the soil and in contaminated water supplies. In animals, M. fortuitum is typically introduced through cutaneous wounds leading to infections limited to the skin, with systemic infection being uncommon. To our knowledge, abortion caused by M. fortuitum has not been reported previously.

Original languageEnglish (US)
Pages (from-to)116-120
Number of pages5
JournalJournal of Veterinary Diagnostic Investigation
Volume34
Issue number1
Early online dateAug 27 2021
DOIs
StatePublished - Jan 2022

Keywords

  • abortion
  • swine
  • mycobacteria
  • nontuberculous
  • Mycobacterium fortuitum
  • nontuberculous mycobacteria

ASJC Scopus subject areas

  • veterinary(all)

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