Host | Agent | Environment |
---|---|---|
Malnutrition | Pathogenic strains of Entamoeba histolytica with greater capacity for contact-dependent cytolysis, phagocytosis, proteolysis | Overcrowding |
Vitamin deficiencies | Poor sanitation | |
Alcoholism | Low socioeconomic status | |
Immune suppression due to HIV/AIDS, malignancy, corticosteroid use, neonate status, pregnancy | ||
Institutional living | ||
Travel to an endemic region |