Multiple choice Which of the following is a causative agent of swamp cancer especially in horses? Shizophyllum Pythium insidiosum Apophysomyces elegans Basidiobolus ranarum Conidiobolus coronatus Reveal answer Fill a bubble to check yourself B Correct answer Explanation Pythium insidiosum is the causative agent of swamp cancer especially in horses, mainly in wet tropical environments. Infections are characterised by tumour-like masses, which develop mostly on the legs.