Podcast Beta
Questions and Answers
What is the term for the host that harbors the adult or sexual stages of a parasite?
What type of parasite can live both in a host and in a free form?
What is the term for the relationship between two living organisms, where one benefits and the other loses?
What is the term for an arthropod that carries the infective stage of a parasite and can transmit it?
Signup and view all the answers
What type of parasite lives inside the body of its host?
Signup and view all the answers
What is the primary mode of infection for Entamoeba histolytica?
Signup and view all the answers
Which of the following diseases is caused by the protozoan Giardia intestinalis?
Signup and view all the answers
Trichomonas vaginalis is a protozoan that causes which of the following diseases?
Signup and view all the answers
Which of the following vectors is responsible for transmitting malaria?
Signup and view all the answers
What is the infective stage of Entamoeba histolytica?
Signup and view all the answers
What is the primary function of the cystic stage in the life cycle of protozoa?
Signup and view all the answers
Which of the following phyla of protozoa includes amoebae and flagellates?
Signup and view all the answers
What is the term for the active feeding and growing stage of protozoa?
Signup and view all the answers
Which of the following is a characteristic of protozoa?
Signup and view all the answers
What is the mode of locomotion in protozoa that belong to the phylum Ciliophora?
Signup and view all the answers
What is the characteristic shape of the trophozoite of Giardia lamblia?
Signup and view all the answers
What is the primary mode of infection for Trichomonas vaginalis?
Signup and view all the answers
Which of the following is NOT a mode of infection for Plasmodium?
Signup and view all the answers
What is the characteristic feature of the cyst of Giardia lamblia?
Signup and view all the answers
What is the primary pathological effect of malaria?
Signup and view all the answers
What is the mode of infection for Ascaris lumbricoides?
Signup and view all the answers
What is the primary symptom of pinworm infection?
Signup and view all the answers
What is the location of the cysticercus in ocular cysticercosis?
Signup and view all the answers
How are the eggs of Enterobius vermicularis recovered from the patient?
Signup and view all the answers
What is the complication of having adult worms in the body?
Signup and view all the answers
What is the primary mode of transmission of Entamoeba histolytica?
Signup and view all the answers
Which of the following parasites can penetrate the skin through direct contact with contaminated soil or water?
Signup and view all the answers
What is the effect of a parasite on the host's tissues?
Signup and view all the answers
Which of the following diseases is caused by a protozoan parasite?
Signup and view all the answers
What is the role of the vector in the transmission of parasites?
Signup and view all the answers
What is the primary mode of transmission of Giardiasis?
Signup and view all the answers
Which of the following parasites can be transmitted through direct contact with an infected person?
Signup and view all the answers
What is the effect of the parasite's waste products on the host?
Signup and view all the answers
Which of the following parasites can be transmitted through maternal-fetal transmission?
Signup and view all the answers
What is the primary mode of transmission of Malaria?
Signup and view all the answers
What is the characteristic of the body of Cestodes?
Signup and view all the answers
What is the characteristic of the digestive system of Nematoda?
Signup and view all the answers
What is unique about the Schistosoma genus compared to other trematodes?
Signup and view all the answers
What is the mode of infection of Schistosoma?
Signup and view all the answers
What is the intermediate host of Schistosoma haematobium?
Signup and view all the answers
Study Notes
Modes of Parasitic Infection
- Food and drink contaminated with parasites (e.g. Entamoeba histolytica and Giardia)
- Soil, dust, and water contaminated with parasites (e.g. Ancylostoma duodenale and S. haematobium)
- Vector-borne transmission (e.g. mosquito bites transmitting Sporozoites of malaria)
- Direct contact with infected skin or contaminated soil (e.g. Scabies and Ancylostoma duodenale)
- Congenital transmission (e.g. Toxoplasma gondii)
Effects of Parasites on the Host
- Mechanical effects: pressure, obstruction, and feeding on tissues
- Toxic effects: toxins and waste products
- Inflammatory and neoplastic reactions
- Secondary infections
Microsporidia Protozoal Infections in Humans
- Entamoeba histolytica: Amoebic dysentery (water, food, or autoinfection)
- Giardia intestinalis: Giardiasis (contaminated water)
- Trypanosoma brucei: Sleeping sickness (Tsetse fly)
- Trypanosoma cruzi: Chagas disease (kissing bug)
- Leishmania spp: Visceral and Cutaneous Leishmaniasis (sandflies)
Intestinal Protozoa
- Entamoeba histolytica: Amebic dysentery and liver abscess
- Giardia lamblia: Giardiasis
- Balantidium coli: Balantidial dysentery
Urogenital Protozoa
- Trichomonas vaginalis: Trichomoniasis (sexual contact)
Blood and Tissue Protozoa
- Plasmodium spp: Malaria (mosquito bites, placenta, blood transfusions, and intravenous drug abuse)
Nematodes
- Enterobius vermicularis: Pinworm infection (enterobiasis) (ingesting worm eggs)
- Ascaris lumbricoides: Ascariasis (ingesting eggs in food or water contaminated with human feces)
Parasitology Terms
- Parasite: a living organism that lives at the expense of its host
- Host: the living organism that harbors the parasite
- Parasitism: the relationship between two living organisms, one benefiting and the other losing
- Definitive host: the host that harbors the adult or sexual stages of the parasite
- Intermediate host: the host that harbors the larval or asexual stages of the parasite
- Vector: an arthropod that carries the infective stage of the parasite and can transmit it
- Reservoir hosts: other hosts that harbor the parasite, ensuring the parasite's life cycle continuity
Life Cycle of Parasites
- Obligate parasite: a parasite that can only live in a host
- Facultative parasite: a parasite that can live both in a host and in a free form
- Endoparasites: parasites that live inside the body
- Ectoparasites: parasites that exist on the body surface
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the basics of parasitology, including the classification of parasites, medical terms, and the concept of parasitism. It's a great resource for students in the medical field.
