exam 3 ALL PARASITE Flashcards
What is Ancylostoma duodenale?
A type of hookworm that matures and copulates in the small intestine of its host.
What is the life cycle of Ancylostoma duodenale?
It has a direct life cycle with eggs passed in feces, requiring warmth, shade, and moisture for development.
What happens to newly hatched J1s of Ancylostoma duodenale?
They live in feces, feed on fecal matter, and undergo 2 molts to become infective J3s.
How long can infective J3s of Ancylostoma duodenale live in soil?
They can live for several weeks in soil.
How does Ancylostoma duodenale penetrate the host?
It penetrates the skin, travels to the heart via blood vessels, then to the lungs, where it is coughed up and swallowed.
What occurs in the small intestine after Ancylostoma duodenale is swallowed?
It molts twice to become adults.
What is a notable anatomical feature of Ancylostoma duodenale?
It has a muscular pharynx.
What factors influence the pathology of hookworm disease?
1) Number of worms present 2) Species of hookworm 3) Nutritional condition of the infected person.
What are the three main phases of hookworm disease?
1) Cutaneous phase: ground itch and cutaneous larva migrans. 2) Pulmonary phase: dry coughing and sore throat. 3) Intestinal phase: attachment to mucosa causing iron deficiency anemia.
What is the blood loss per day due to Ancylostoma duodenale?
Approximately 0.26 mL of blood loss per day.
What are the epidemiological factors related to Ancylostoma duodenale?
Lack of adequate sanitation and economic dependence on night soil.
What is the optimal temperature range for juvenile Ancylostoma duodenale?
23°C to 30°C.
