Cryptosporidium in Reptiles: What Every Keeper Should Know

What is Cryptosporidium?

Cryptosporidium is a genus of protozoan parasites that infect the gastrointestinal tract of reptiles. Two species are of primary concern:

C. serpentis — primarily affects snakes

C. varanii (formerly C. saurophilum) — affects lizards

Chronic regurgitation (especially in snakes)

Weight loss despite normal appetite

Swollen mid-body ("midbody swelling")

Lethargy and eventual wasting

At Repttown Lab, we use PCR-based detection which is far more sensitive than traditional acid-fast staining:

Sensitivity: >99% vs ~30% for microscopy

Sample type: Fecal swab or cloacal wash

Turnaround: 3-5 business days

Unfortunately, there is no reliable cure for Cryptosporidium. Management focuses on:

Strict quarantine of infected animals

Supportive care — maintain optimal temps and hydration

Biosecurity — dedicated tools, handwashing between animals

F10SC disinfectant at 1:250 dilution for enclosure cleaning

Test all new acquisitions before introduction

Quarantine for minimum 90 days

Regular screening of established collections

Never share tools between enclosures