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A plant genus of the family RANUNCULACEAE. Members contain hellebrin (BUFANOLIDES). The extract is the basis of Boicil preparation used to treat rheu…

Helminth eggs identified microscopically in a clinical specimen.

A mitosporic fungal genus including both saprophytes and plant parasites.

Commonly known as parasitic worms, this group includes the ACANTHOCEPHALA; NEMATODA; and PLATYHELMINTHS. Some authors consider certain species of LEE…

Large nocturnal, venomous lizard found in the deserts of the Southwestern United States and northern Mexico. A synthetic version of Gila monster veno…

Viruses which enable defective viruses to replicate or to form a protein coat by complementing the missing gene function of the defective (satellite)…

A genus of elapid snake indigenous to Southern Africa. It is closely related to the cobras (Naja) and is capable of spitting its venom.

A plant genus of the family ASPHODELACEAE. Members contain steroidal saponins.

A genus of SEA URCHINS in the family Strongylocentrotidae with a hemicyclic apical disk and short spines.

A plant genus of the family Apocynaceae. It is a source of PREGNANES and is sometimes an adulterant of commercial sarsaparilla (SMILAX).

A large order of insects characterized by having the mouth parts adapted to piercing or sucking. It is comprised of four suborders: HETEROPTERA, Auch…

Any of several poisonous plants, commonly called poison hemlock, of the CICUTA or CONIUM genus. The hemlock tree (TSUGA) is completely unrelated bein…

A species of ORBIVIRUS causing a fatal disease in deer. It is transmitted by flies of the genus Culicoides.

A species in the genus LAGOVIRUS which causes hemorrhagic disease, including hemorrhagic septicemia, in rabbits.

A species of NAIROVIRUS of the family BUNYAVIRIDAE. It is primarily transmitted by ticks and causes a severe, often fatal disease in humans.

A species of HENIPAVIRUS first identified in Australia in 1994 in HORSES and transmitted to humans. The natural host appears to be fruit bats (PTEROP…

A genus in the subfamily PARAMYXOVIRINAE, family PARAMYXOVIRIDAE. It contains species that infect and cause potentially fatal disease in a number of …

A genus of FLAVIVIRIDAE causing parenterally-transmitted HEPATITIS C which is associated with transfusions and drug abuse. Hepatitis C virus is the t…

A family of hepatotropic DNA viruses which contains double-stranded DNA genomes and causes hepatitis in humans and animals. There are two genera: AVI…

A species in the genus HEPATOVIRUS containing one serotype and two strains: HUMAN HEPATITIS A VIRUS and Simian hepatitis A virus causing hepatitis in…

A strain of HEPATITIS A VIRUS which causes hepatitis in humans. The virus replicates in hepatocytes and is presumed to reach the intestine via the bi…

Hepatitis B surface antigen detected in a clinical specimen.

The type species of the genus ORTHOHEPADNAVIRUS which causes human HEPATITIS B and is also apparently a causal agent in human HEPATOCELLULAR CARCINOM…

A DNA virus that closely resembles human hepatitis B virus. It has been recovered from naturally infected ducks.

An ORTHOHEPADNAVIRUS causing chronic liver disease and hepatocellular carcinoma in woodchucks. It closely resembles the human hepatitis B virus.

A defective virus, containing particles of RNA nucleoprotein in virion-like form, present in patients with acute hepatitis B and chronic hepatitis. I…

A positive-stranded RNA virus species, causing enterically-transmitted non-A, non-B hepatitis (HEPATITIS E).

Unassigned species, in the family PICORNAVIRIDAE, causing high mortality in ducklings 3 days to 3 weeks old.

Any of the viruses that cause inflammation of the liver. They include both DNA and RNA viruses as well viruses from humans and animals.

A plant division. They are simple plants that lack vascular tissue and possess rudimentary rootlike organs (rhizoids). Like MOSSES, liverworts have a…