No, black colored worms.
I don’t know many virologists here, so I haven’t confirmed, but they’re mostly likely the cause, or related to one of the species that gives a lot of folks gastrointestinal problems in coastal communities, I usually refer to this as “Atahualpa’s revenge.”
All joking aside, it’s a massive problem, these communities continue to suffer from a lack of clean water. I work in these areas seasonally, and even near the more “developed” areas with beachfront condos, it can be difficult to even find a place to purchase bottled water for a child, let alone to be able to afford the ridiculous prices stores in these towns charge for basic products.
The thought of living in that reality scares me more than the thought being in the water with an anaconda.