The situation may again be as bad as 2 decades ago Attempts to develop a vaccine have so far failed. Often transmitted by water supply, by drinking water in remote areas. Can be cured by drugs. Infection transmitted by sand flies that require blood meal. Found in tropical regions where sand flies flourish Normal hosts are dogs, other wild and domesticated animals.
Humans are usually accidental hosts.
Cryptosporidium Water supply contaminant. The elderly and the very young especially susceptible. Fungi Fungi are one of the five kingdoms. Fungal cells, like plants, are not motile. Fungi secrete enzymes to degrade organic matter, such as plant fibers.