A peritoneal dialysis patient contracted a rare fungal infection caused by Arthrocladium tropicale, a mold found in damp environments and associated with ant nests. The infection was diagnosed through microscopy and genetic testing, revealing resistance to one antifungal drug but susceptibility to amphotericin B. Treatment with this antibiotic and removal of the dialysis catheter led to full recovery, highlighting the importance of keeping medical equipment storage areas dry and pest-free.