Types of Hosts and Parasites Quiz

The host where a parasite reaches its adult stage, usually reproducing. Example: Sheep for the liver fluke Fasciola.

The host where the parasite lives in its immature, larval stage. Example: Snails for the liver fluke Fasciola.

An animal that can harbor the adult stage of a parasite and transmit it to other hosts but doesn't necessarily show symptoms. Example: Some wild animals for the liver fluke Fasciola.

An arthropod, like a mosquito or tick, that carries a parasite from one host to another. Example: Mosquitoes for malaria.

Parasites living on the surface of the host, like lice.

Parasites living inside the body of the host, like tapeworms.

Parasites that only cause disease in weakened immune systems, like opportunistic bacteria.

The parasite's egg stage, often found in feces and used for diagnosis.

The stage of a parasite's life cycle where it is inside its host and can infect another host.

A type of white blood cell that increases in number during parasitic infections, indicating an immune response.

A diagnostic method that uses PCR to detect parasitic DNA in stool or urine samples.

The stage of a parasite that is capable of infecting a new host.

The stage of a parasite that is usually detected in a host's sample, confirming infection.

A method of controlling parasitic infections by giving medications to entire populations, regardless of infection status.

A parasitic disease caused by the larval stage (hydatid cyst) of the Echinococcus granulosus tapeworm. Humans act as the intermediate host, ingesting eggs from contaminated food or contact with infected dogs.

The larval stage of the Echinococcus granulosus tapeworm, responsible for hydatid disease. They are fluid-filled sacs that can grow large and affect various organs.

The outer, non-cellular layer of a hydatid cyst. It's tough and laminated, providing structural support.

The inner, cellular layer of a hydatid cyst containing germinal cells. It's responsible for producing scolices, brood capsules, and daughter cysts.

Small, bud-like structures within a hydatid cyst that develop into adult tapeworms in the definitive host.

Small cysts within a hydatid cyst formed by invagination of the germinal layer. They produce scolices.

Cysts derived from the mother cyst, also containing scolices, brood capsules, and even grand-daughter cysts.

Fluid present within a hydatid cyst.

The stage of the Ascaris lumbricoides parasite that is found inside the egg and is capable of infecting a human host.

The stage of the Ascaris lumbricoides parasite that is used to diagnose infection by examining stool samples.

A common symptom of Ascaris lumbricoides infection where the migrating larvae cause inflammation and damage to the lungs.

A type of intestinal infection caused by the Ascaris lumbricoides parasite.

The stage of Trichuris trichiura parasite that is used to diagnose infection by examining stool samples.

The stage of the Trichuris trichiura parasite that is capable of infecting a human host.

The characteristic shape of the Trichuris trichiura egg, which is narrower at one end and wider at the other, resembling a barrel or a whip.

A type of intestinal infection caused by the Trichuris trichiura parasite, also known as whipworm, which is characterized by a variety of symptoms related to inflammation and damage to the large intestine.

The stage of the parasite responsible for infecting humans.

The stage of the parasite that is used to diagnose schistosomiasis.

The process of humans becoming infected with Schistosoma. Occurs when cercariae penetrate the skin while in contact with contaminated water.

A characteristic symptom of Schistosomiasis often caused by eggs escaping into the urine.

One of the diagnostic methods for Schistosomiasis. Directly looking for eggs in urine or stool samples.

The preferred drug treatment for schistosomiasis, effective against all Schistosoma species.

The segment of the tapeworm that can be found in the stool of a human host, containing eggs.

The stage of the Taenia saginata tapeworm that is found in cattle, and ingested by humans to cause infection.

The infective stage of Ancylostoma duodenale, a hookworm, is the 3rd stage filariform larva. This larva is approximately 500-700 µm long, sheathed, and has a sharply pointed tail.

Ancylostoma duodenale, a hookworm, infects humans through active penetration by the infective 3rd stage filariform larva. This often occurs through exposed skin, especially the hands, feet, arms, and legs.

Ancylostoma duodenale, a hookworm, typically resides in the small intestine, specifically the jejunum, of humans.

Ancylostoma duodenale, a hookworm, causes ancylostomiasis. Symptoms can include pulmonary hypersensitivity response due to larval migration (verminous pneumonia), and mechanical injury to the intestinal mucosa.

The diagnosis of Ancylostoma duodenale, a hookworm, involves examining stool samples for eggs and conducting a stool culture to identify the 3rd stage filariform larva.

Trichuris trichiura, a whipworm, can cause rectal prolapse in children with heavy infections. This occurs due to the worm's attachment to the intestinal wall.

Trichuris trichiura, a whipworm, can cause anemia. This is due to continuous blood loss from the intestinal wall and the production of toxins by the worm.

Trichuris trichiura, a whipworm, can occasionally migrate to the appendix, causing appendicitis. This occurs when the worm disrupts the appendix's structure.