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Deadly Fungus and Parasites Threaten Wild Rattlesnakes

Published on June 21, 2026, 12:36 p.m.
Deadly Fungus and Parasites Threaten Wild Rattlesnakes

Topic: Biology

Researchers found that wild rattlesnakes are being affected by a deadly fungus called Ophidiomyces ophidiicola, which is causing skin lesions and respiratory illness. Many snakes were also carrying multiple parasites at the same time.

Snakes around the world are facing a major threat to their survival. One of the biggest concerns is a deadly fungus called Ophidiomyces ophidiicola, or snake fungal disease. This fungus has been detected in many snake species and can cause skin lesions and respiratory illness. In an effort to better understand the overall health of wild snakes, researchers investigated seven different pathogens in native snake populations in the southeastern United States.

The study found that fewer than 20% of the snakes tested showed no signs of infection. The most common pathogen was Salmonella enterica, which appeared in 63% of the snakes. Another common infection came from Hepatozoon spp., a tick-borne parasite found in 53% of the animals.

The researchers also discovered that many snakes were carrying multiple parasites at the same time. In fact, 44% of the snakes had multiple infections. Some snake species were much more vulnerable to certain diseases than others. Pygmy rattlesnakes, for example, showed especially high rates of snake fungal disease. Of the 34 rattlesnakes tested, 12 were positive for Oo, and many also displayed visible signs of illness.

The study's findings highlight the importance of understanding the overall health of wild snakes and the threats they face from disease. This information can help conservation efforts to protect these animals.

Why It Matters

This research is important because it helps us understand the health risks facing wild snakes, which are an important part of our ecosystem. By studying snake diseases, we can develop strategies to conserve these animals and prevent their extinction.

Key Facts

  • The deadly fungus Ophidiomyces ophidiicola has been detected in many snake species and can cause skin lesions and respiratory illness.
  • 44% of the snakes tested had multiple infections.
  • Pygmy rattlesnakes were found to be especially vulnerable to snake fungal disease, with 12 out of 34 testing positive for Oo.
  • The study found that Salmonella enterica was the most common pathogen, appearing in 63% of the snakes.
  • Hepatozoon spp., a tick-borne parasite, was found in 53% of the animals.

Key Terms

Ophidiomyces ophidiicola
A deadly fungus that causes skin lesions and respiratory illness in snakes

Implications

This research is important because it helps us understand the health risks facing wild snakes, which are an important part of our ecosystem. By studying snake diseases, we can develop strategies to conserve these animals and prevent their extinction.


Source: https://www.sciencedaily.com/releases/2026/05/260526021950.htm

Journal Reference:

  1. Corinna M. Mishin, Terence M. Farrell, Jenna N. Palmisano, Robert J. Ossiboff, Makaylah McCray, Ellen Haynes, John C. Maerz, Kristina Meichner, Jian Zhang, Kayla B. Garrett, Michael J. Yabsley, Jason Ortega, Christopher A. Cleveland, Nicole M. Nemeth. Health assessment and multipathogen surveillance of free-ranging snakes in the southeastern United States. Frontiers in Veterinary Science, 2026; 13 DOI: 10.3389/fvets.2026.1754420

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