Search results
Results from the WOW.Com Content Network
The black rat is a reservoir host for bubonic plague. The rat fleas that infest the rats are vectors for the disease. In biology and medicine, a host is a larger organism that harbours a smaller organism; [1] whether a parasitic, a mutualistic, or a commensalist guest . The guest is typically provided with nourishment and shelter.
A reservoir is usually a living host of a certain species, such as an animal or a plant, inside of which a pathogen survives, often (though not always) without causing disease for the reservoir itself. By some definitions a reservoir may also be an environment external to an organism, such as a volume of contaminated air or water. [1] [2]
Spillover infection – cross-species transmission of pathogens from a domestic or wildlife animal reservoir to a new human host. Vector – organism, typically an insect or arachnid, that transmits pathogens from an infected host to a susceptible host individual. Zoonosis – infectious disease transmissible from animals to humans.
Species of the other subclass, Cestodaria, are mainly fish infecting parasites. All cestodes are parasitic; many have complex life histories, including a stage in a definitive (main) host in which the adults grow and reproduce, often for years, and one or two intermediate stages in which the larvae develop in other hosts.
These three areas can have very different abiotic conditions and, hence, host species that are specifically adapted to live there. [1] Two important subclasses of lakes are ponds, which typically are small lakes that intergrade with wetlands, and water reservoirs. Over long periods of time, lakes, or bays within them, may gradually become ...
The adult flukes can then produce up to 25,000 eggs per fluke per day. [11] These eggs are passed out via stools and into freshwater. Once in freshwater, the eggs become embryonated , allowing them to hatch as miracidia , which then find a suitable intermediate snail host of the Lymnaeidae family.
The adults worms and the developing larvae inhabit the same infected vertebrate host that will serve as the definitive host and possibly even the intermediate host. [6] The life cycle of all species in the genus Trichinella consist of two generations, reproductive adults and larvae that grow to the infective state, where the larvae will encyst ...
Rickettsia prowazekii is a species of gram-negative, alphaproteobacteria, obligate intracellular parasitic, aerobic bacillus bacteria that is the etiologic agent of epidemic typhus, transmitted in the feces of lice. In North America, the main reservoir for R. prowazekii is the flying squirrel.