Freshwater crab Freshwater crab There are around 1,300 species of freshwater crabs, distributed throughout the tropics and subtropics, divided among eight families. They show direct development and maternal care of a small number of offspring, in contrast to marine crabs which release thousands of planktonic larvae. This limits the dispersal abilities of freshwater crabs, so they tend to be endemic to small areas. As a result, a large proportion are threatened with extinction. There are more than 1,300 described species of freshwater crabs, out of a total of 6,700 species of crabs across all environments. The total number of species of freshwater
National Institute of Allergy and Infectious Diseases government, and non-governmental organizations in multifaceted and multidisciplinary efforts to address emerging health challenges such as the pandemic H1N1/09 virus. NIAID traces its origins to a small laboratory established in 1887 at the Marine Hospital on Staten Island, New York Officials of the Marine Hospital Service in New York decided to open a research laboratory to study the link between microscopic organisms and infectious diseases. Dr. Joseph J. Kinyoun, a medical officer with the Marine Hospital Service, was selected to create this laboratory, which he called a "laboratory of hygiene." Kinyoun's lab was renamed the Hygienic Laboratory in 1891 and