Why are rattlesnakes hit harder by disease?

Rattlesnakes are unusually vulnerable to fungal and parasitic lung infections

A study highlights that among snakes, rattlesnakes are among the most vulnerable to a combination of disease threats—fungal disease and parasitic lung infections. The work frames these infections as a significant contributor to the broader conservation risk facing snakes in many regions.

The story matters because it links two forms of biological harm that can interact in the wild: pathogens that damage health directly (fungi) and parasites that colonize the respiratory tract (lung parasites). Together, these pressures can reduce survival and reproduction, accelerating population declines.

The disease challenge

Key elements described include: - Fungal disease and parasitic lung infection appear to be central threats. - Rattlesnakes stand out as especially susceptible compared with other snakes studied.

Why it matters for extinction risk

Snakes are threatened with extinction globally, and disease is discussed as one of the key factors alongside other pressures like habitat change. By identifying which groups are most vulnerable, conservation planning can prioritize monitoring, habitat management, and—where feasible—interventions aimed at reducing disease impacts.

What’s still missing

The summary provided does not give details on the specific fungi or parasite species involved, nor does it quantify how much more infection rattlesnakes experience. It also does not identify the precise mechanisms of susceptibility (for example, immune differences or exposure patterns).

Even without those specifics, the direction of the evidence is clear: disease risk is not uniform across snake species, and rattlesnakes may require particular attention when assessing conservation threats.