# Fungal Infections on Live Spider Bodies: Overview, Causes, and Management ## Overview Fungal infections on spiders, particularly manifesting as mould growth on the cuticle, are a ‘common issue’ in captive arachnids. The cuticle, which serves as a critical barrier for both structural support and protection, can become compromised under certain environmental conditions, allowing fungal spores to colonise and spread. This growth may appear as white or green patches and, if left untreated, can impair the spider's health by penetrating the protective exoskeleton. ## Causes Fungal colonisation on spider cuticles is primarily attributed to environmental factors within the enclosure. Elevated moisture, sub-optimal ventilation, and inadequate sanitation can create conditions conducive to fungal growth. Organic substrates, particularly those that retain moisture, provide ideal surfaces for fungal spores to settle and proliferate. Additionally, the accumulation of decaying organic matter, such as uneaten prey or plant material, can increase the likelihood of fungal establishment and subsequent infection on the cuticle. ## Management Effective management of fungal infections on spider cuticles involves both direct treatment and environmental adjustments. Treatment typically consists of daily application of a mild antiseptic solution, such as diluted povidone-iodine, directly to the affected areas using a cotton applicator. (The author and illustrations note a q-tip as preference for ease of access.) This approach can inhibit fungal growth and aid in its resolution. Preventive measures include maintaining controlled moisture levels, ensuring adequate ventilation, and employing substrates with lower moisture retention. Regular enclosure cleaning (removal of waste) is also essential in reducing the risk of fungal colonisation. ![[Pasted image 20241111105657.png]] ![[Pasted image 20241111105722.png]] ![[Pasted image 20241111105744.png]] ![[Pasted image 20241111105755.png]]