Parasitology Quiz

<p>Chagas' Disease (A)</p> Signup and view all the answers

<p>20 million (B)</p> Signup and view all the answers

<p>Blood loss leading to anemia (B)</p> Signup and view all the answers

<p>Necrosis of tissues (C)</p> Signup and view all the answers

<p>Multicellular organisms (D)</p> Signup and view all the answers

<p>Through nutrient absorption from the host (A)</p> Signup and view all the answers

<p>Amoebae (C)</p> Signup and view all the answers

<p>It wanders into an organ it does not usually inhabit. (C)</p> Signup and view all the answers

<p>They are not harmful to immunocompetent individuals. (A)</p> Signup and view all the answers

<p>Trophozoite (C)</p> Signup and view all the answers

<p>Definitive host (A)</p> Signup and view all the answers

<p>Contains organelles for reproduction (B)</p> Signup and view all the answers

<p>They contain a nucleus and organelles (A)</p> Signup and view all the answers

<p>Monoxen parasites require only one host, whereas heteroxen need multiple hosts. (A)</p> Signup and view all the answers

<p>Hosts that harbor parasites for extended periods, acting as infection sources. (A)</p> Signup and view all the answers

<p>The degree of pathogenicity of a parasite. (B)</p> Signup and view all the answers

<p>Humans infected with Echinococcus granulosus in unusual situations. (A)</p> Signup and view all the answers

<p>Presence of parasites within bodily tissues. (B)</p> Signup and view all the answers

<p>Commensalism (A)</p> Signup and view all the answers

<p>Both partners benefit and are metabolically dependent. (A)</p> Signup and view all the answers

<p>Ticks feeding on the blood of a mammal. (B)</p> Signup and view all the answers

<p>One organism benefits with no injury to the other. (D)</p> Signup and view all the answers

<p>Medical parasitology (A)</p> Signup and view all the answers

<p>An organism that takes nutrition from another species, harming it in the process. (B)</p> Signup and view all the answers

<p>Parasites can cause significant public health issues. (C)</p> Signup and view all the answers

<p>None of the above (D)</p> Signup and view all the answers

<p>Taking in nutrients (C)</p> Signup and view all the answers

<p>Pseudopodia (D)</p> Signup and view all the answers

<p>Trophozoite (C)</p> Signup and view all the answers

<p>Budding (D)</p> Signup and view all the answers

<p>Infect only mammals (C)</p> Signup and view all the answers

<p>They have a cylindrical, non-segmented body. (C)</p> Signup and view all the answers

<p>They display a cylindrical body shape. (C)</p> Signup and view all the answers

<p>Controlling the source of infection. (D)</p> Signup and view all the answers

<p>They have separate sexes. (D)</p> Signup and view all the answers

<p>Humans are the definitive host. (D)</p> Signup and view all the answers

A relationship between two living organisms where one organism benefits and the other is harmed. The benefiting organism is called the parasite and the harmed organism is called the host.

A relationship between two living organisms where both organisms benefit. Both partners are dependent on each other for survival.

A relationship between two living organisms where one organism benefits and the other is neither harmed nor helped. The benefiting organism is called the commensal.

An organism that lives in or on another organism and benefits by deriving nutrients at the expense of the host.

The study and medical implications of parasites that infect humans.

The organism that supports a parasite and is harmed by it.

The living organisms involved in a symbiotic relationship.

The relationship between two living organisms where one organism is benefited and the other is not affected.

A parasitic organism that lives on the external surface of another organism. Think of lice or ticks!

A parasitic organism that lives within another living organism. Think of Plasmodium or Giardia.

A parasite that is completely dependent on a host for its survival during all or part of its life cycle. It can't survive without a host. Think of Plasmodium.

A parasite that lives in a host where it is not normally found.

A parasite that can live both independently and inside a host. This parasite can survive independently for a period of time before it needs a host. Think of Strongyloides stercoralis.

A parasite that only requires one host to complete its life cycle.

A parasite that accidentally enters a host that it is not normally adapted to. It can survive within the host, but may not be able to complete its life cycle. Think of a parasite that lives in a water source, and someone accidentally drinks the water.

A parasite that requires more than one host to complete its life cycle.

The host in which the adult or sexually mature stage of a parasite lives.

The host in which the parasite lives during a period of its development only.

A host that is not normally infected with a parasite, but can be infected under certain circumstances.

A parasite that is capable of causing disease.

The degree of a pathogen's ability to cause disease.

A form of protozoa responsible for causing infection, characterized by being motile and active.

A specialized structure in some protozoa, facilitating the intake of nutrients, often referred to as a 'mouth' but it's not as complex.

A type of motility structure found in some protozoa, characterized by whip-like movements. They help with movement and also play a role in sensory functions.

A type of motility structure different from flagella, hair-like projections, allowing movement and assisting in feeding and sensory functions.

Parasites can cause anemia by sucking blood from the host, as seen with hookworms.

Parasites can cause physical damage to the host, such as blockages or perforations in organs. Ascaris, a type of roundworm, can cause such issues.

Parasites can produce toxins or trigger allergic reactions in the host. For example, Entamoeba histolytica, a type of amoeba, releases enzymes leading to tissue damage.

Parasites can affect the immune system through their antigens, triggering immune responses and potentially causing allergies or hypersensitivity.

Parasites can cause various tissue damage throughout the body, affecting the gastrointestinal tract, respiratory system, nervous system, and skin. Eosinophilia, an increase in eosinophils, is often observed in parasitic infections.

Protozoa are single-celled eukaryotic organisms, like Plasmodium, the parasite responsible for malaria.

Metazoa are multicellular organisms, including worms (helminths) and arthropods (ticks, lice), which can parasitize humans.

When naming parasites, the genus starts with a capital letter, and the species is always written in italics. For example, Plasmodium falciparum and Giardia lamblia.

Roundworms belong to the phylum Nematoda and are characterized by their unsegmented, cylindrical bodies, covered with a non-cellular cuticle. They have separate sexes and a complete digestive tract. Humans are the definitive host for many roundworm species.

The Ascaris lumbricoides is a type of roundworm that infects humans. It lives in the small intestine of humans and can cause intestinal blockage and malnutrition.

Trematodes, also known as flukes, are flatworms with leaf-like (except Schistosoma) bodies and are mostly hermaphrodites. They have a blind gut and often require multiple hosts for their life cycle, including snails.

Tapeworms are segmented flatworms called cestodes. They have a scolex (head) with suckers or hooks for attaching to their host, a neck, and proglottids (segments). Tapeworms are hermaphroditic and lack a digestive system.

Preventing parasitic infections involves controlling the source of infection, managing feces and water resources, eliminating vectors and intermediate hosts, and protecting susceptible hosts through personal hygiene and changing bad eating habits.