32 Questions
Which large group of helminthic parasites includes roundworms?
Nematodes
What are the most important roundworms that parasitize the human intestine?
Ascaris, pinworm, whipworm, and hookworms
Which nematode is considered the most commonly encountered parasitic worm globally?
Ascaris
In which areas are intestinal nematodes of greatest concern?
Tropical areas and regions of poor sanitation
What health issues can result from infestation by intestinal nematodes?
Growth retardation and malnutrition
Which option correctly describes Trichinella spiralis?
A rare tissue nematode in the United States
What is the main reason why direct person-to-person transmission of Ascaris eggs does not occur?
A maturation period is needed before the eggs become infectious
How long can mature Ascaris eggs survive in the soil?
2 years
Where do larval worms released from Ascaris eggs burrow through after being ingested?
Intestine, liver, and lungs
How is Trichuriasis transmitted to humans?
By ingestion of whipworm eggs from fecally contaminated soil
Where do adult forms of whipworms reside in the human body?
Colon
What is the main symptom of pinworm infection in individuals?
Intense anal itching
How are pinworm infections usually acquired?
Ingesting worm eggs transferred to hands from contaminated objects
What is the main route through which pinworm eggs are deposited outside the body by female worms?
Through the anus
How is hookworm disease primarily caused in humans?
Through skin penetration by hookworm larvae
What is a common cause of acquired epilepsy in developing countries?
Neurocysticercosis
How do humans become infected by tapeworms?
By ingesting the flesh of an infected animal
Which country's immigrant populations, particularly Hispanics in the Southwest, are more likely to be affected by neurocysticercosis?
United States
What is the major risk factor for the development of bladder cancer in individuals infected with blood flukes?
Damage to the bladder and ureters
What type of infection can humans get from swimming in lakes contaminated by bird or animal schistosomes?
Schistosome dermatitis
What is the main consequence of tapeworm infection in humans?
Nourishing the worm at the expense of the host's food
Which organ does one species of flukes live in?
Lung
'Swimmers itch' is more commonly referred to as:
'Schistosome dermatitis'
'Taeniasis' refers to:
'Tapeworm infection'
'Cysticercosis' is associated with which type of tapeworm?
'Pork tapeworm'
How does hookworm infection occur?
Direct contact with larvae in soil contaminated with human feces
What is a major clinical effect of hookworm infection?
Intestinal blood loss
In which region has it been estimated that 30% of the population is infected with parasitic infection?
Sub-Saharan Africa
What causes trichinellosis (trichinosis) infection?
Eating undercooked wild game
How do larvae released from ingested Trichinella cysts develop within the body?
They burrow into the intestinal mucosa and produce more larvae
How is Strongyloidiasis (threadworm) infection similar to hookworm infection?
Both infections occur via intact skin
What is a potential severe symptom of trichinellosis infection?
Muscle pain
Explore the prevalence of parasitic infections in subtropical and tropical regions, with a focus on hookworm infection. Learn about the common factors contributing to parasitic infections and the regions where such infections are most widespread.
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