30 Questions
What is the term used to describe a host that serves as a temporary refuge and vehicle for reaching an obligatory host, usually the definitive host?
Paratenic host
Which of the following is the correct definition of a reservoir host?
A host that makes the parasite available for the transmission to another host and is usually not affected by the infection.
Which of the following is an example of a commensalistic relationship?
The relationship between most of the normal floras of the humans' body and the human host.
Which of the following is the correct definition of an accidental host?
A host that is under normal circumstances not infected with the parasite.
Which of the following is an example of a mutualistic relationship?
The relationship between flagellated protozoa living in the gut of termites.
Which of the following is the correct definition of a natural host?
A host that is naturally infected with certain species of parasite.
Which of the following best describes an obligate parasite?
A parasite that is completely dependent on a host during its life cycle
What is an accidental parasite?
A parasite that infects an unnatural host and survives
Which of the following is the correct definition of an erratic parasite?
A parasite that wanders into an organ where it is not usually found
What is the primary characteristic of a facultative parasite?
It exhibits both parasitic and non-parasitic modes of living
Which of the following best defines a definitive host?
A host that harbors a parasite in its adult stage or where the parasite undergoes sexual reproduction
What is the role of an intermediate host?
To harbor the larval stages of the parasite or an asexual cycle of development
Which of the following is the primary host for Schistosoma haematobium?
Humans
What is the infective stage of Schistosoma haematobium?
Cercariae
What is the diagnostic stage for Schistosoma haematobium infection?
Eggs in urine
Which of the following is a symptom of Schistosoma mansoni infection?
Cercarial dermatitis
Which of the following is a pathogenic stage of Schistosoma infection?
Cercariae
Which of the following is a characteristic of fungi?
Composed of filaments called hyphae
What is the most common symptom of Plasmodium vivax infection in humans?
Fever at 48-h intervals
Which species of malaria parasite causes malignant tertian malaria?
Plasmodium falciparum
Where do sporozoites migrate after being transmitted into the human bloodstream by an Anopheles mosquito?
Liver
Which stage in the liver is a quiescent stage that exists only in P. vivax and P. ovale infections?
Hypnozoites
What is the role of male and female gametocytes in the malaria parasite lifecycle?
Transform into sporozoites
What is the final step in the cycle of transmission of malaria by an Anopheles mosquito?
Biting another host
What is the primary mode of transmission for Enterobius vermicularis (pinworm) infection?
Ingestion of contaminated raw vegetables
Which of the following is NOT a potential symptom or complication associated with pinworm infection?
Jaundice (yellowing of the skin and eyes)
What is the diagnostic stage for Enterobius vermicularis infection?
Detection of eggs in stool samples
Which of the following is NOT a potential complication of toxoplasmosis infection during pregnancy?
Jaundice in the newborn
Which of the following statements about toxoplasmosis is correct?
It can cause myocarditis (inflammation of the heart muscle)
What is the primary route of transmission for pinworm infection mentioned in the text?
Fecal-oral route
Learn about the classification of parasites in medical parasitology, including protozoa, helminths, and arthropods. Discover the differences between ectoparasites and endoparasites, and their relationships with host organisms.
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