Understanding Nidovirus: Detection and Prevention in Ball Pythons
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Understanding Nidovirus: Detection and Prevention in Ball Pythons

April 16, 2026

What is Nidovirus?

Nidovirus (specifically, ball python nidovirus or BPNV) is an RNA virus that causes severe respiratory disease in ball pythons and other snake species. First identified in 2014, it has since been recognized as one of the most significant viral threats to captive python collections.

Clinical Signs

Infected animals may display:

  • Excessive mucus production
  • Open-mouth breathing
  • Lethargy and anorexia
  • Audible respiratory sounds
  • In severe cases, pneumonia and death

    • PCR-Based Detection

    At Repttown Lab, we use quantitative real-time PCR (qPCR) to detect Nidovirus with a sensitivity threshold of just 10 viral copies per reaction. Our assay targets a conserved region of the viral RNA-dependent RNA polymerase (RdRp) gene.

    Sample Types We Accept

  • Oral swabs (preferred)
  • Tracheal washes
  • Lung tissue (post-mortem)

    • Prevention Best Practices

  • Quarantine all new arrivals for a minimum of 90 days
  • Test before introduction — even asymptomatic carriers can shed virus
  • Practice strict hygiene — dedicated tools per enclosure
  • Annual screening for established collections

    • Our Recommendation

    We recommend testing all new ball pythons for Nidovirus before introducing them to an existing collection. Early detection is key to preventing outbreaks that can devastate a breeding program.