ORGANISM 7: Necator americanus
GENERAL CHARACTERISTICS
COMMON NAME: New World hookworm (archaic).
GEOGRAPHICAL DISTRIBUTION: Western hemisphere.
PATHOGENESIS: Inflammation of intestinal mucosa, anemia (chronic nutritional
deficiency type) diarrhea, pneumonitis, eosinophilia,
erythemia, dyspnea. Same as A. duodenale.
HABITAT: Small intestines.
INTERMEDIATE HOST: None.
RESERVOIR HOST: None.
INFECTIVE FORM: Filariform larva.
MODE OF INFECTION: Active penetration.
SPECIMEN OF CHOICE: Feces.
Figure 4-15. Life cycle of Necator americanus.
MD0842
4-20