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Free-living flatworms are mostly predators, and live in water or in shaded, humid terrestrial environments, such as leaf litter. Cestodes (tapeworms) and trematodes (flukes) have complex life-cycles, with mature stages that live as parasites in the digestive systems of fish or land vertebrates , and intermediate stages that infest secondary hosts.
A World Health Organization infographic that states that hydroxychloroquine does not prevent illness or death from COVID-19. Chloroquine and hydroxychloroquine are anti-malarial medications also used against some auto-immune diseases. [1] Chloroquine, along with hydroxychloroquine, was an early experimental treatment for COVID-19. [2]
The improper usage of personal protective equipment by researchers and zookeeper staff is the most common method of transmission of COVID-19 from humans to gorillas. Properly using personal protective equipment is one of the best ways to prevent COVID-19 and other transmittable diseases from infecting gorillas in captivity and the wild.
Like other related marine flatworms, the new species has both male and female genitalia, the study said. Huidong marine flatworms have at least 170 eyes on their heads, researchers said.
Thysanozoon nigropapillosum is quite common along the external reef in the shallow sub-tidal zone. It can swim by undulating and rhythmically contracting the body margins. It feeds on tunicates, using its mouth and large pharynx to engulf Didemnum spp., and later regurgitates food pellets containing the calcareous spicules present in their tunic
Fasciola hepatica, also known as the common liver fluke or sheep liver fluke, is a parasitic trematode (fluke or flatworm, a type of helminth) of the class Trematoda, phylum Platyhelminthes. It infects the livers of various mammals, including humans, and is transmitted by sheep and cattle to humans all over the world.
Platydemus manokwari, also known as the New Guinea flatworm, is a large predatory land flatworm that has become an invasive species in many countries. [1] [2] Platydemus manokwari, invasive in Florida, US. Native to New Guinea, it was accidentally introduced to the soil of many countries.
Ascidiacea, commonly known as the ascidians or sea squirts, is a paraphyletic class in the subphylum Tunicata of sac-like marine invertebrate filter feeders. [2] Ascidians are characterized by a tough outer test or "tunic" made of the polysaccharide cellulose .