Forensic Files - Season 2_ Episode 13 - Deadly Parasites - (In HD)

In the spring of 1993, Milwaukee became the epicenter of a public health nightmare when a mysterious gastrointestinal illness swept through the city, sickening 400,000 residents and sending 4,000 to the hospital. Health officials initially suspected influenza, but the true culprit was far more insidious: cryptosporidium, a microscopic parasite contaminating the municipal water supply [citation:1][citation:2]. The outbreak proved especially deadly for those with compromised immune systems, tragically claiming the life of a young girl named Becky Ferman [citation:1]. The investigation, led by microbiologist Sandy Shraderus, traced the contamination back to sewage runoff from heavy rains that had infiltrated Lake Michigan [citation:1][citation:5]. This case became a watershed moment in environmental health, prompting cities nationwide to rethink their water treatment protocols to prevent such a tragedy from happening again.