Intermediate hosts (like snails or pigs) and the specific mode of entry (ingestion, skin penetration, or insect bites). 3. Medical Entomology
A) Entamoeba histolytica ❌ (Shows directional motility and ingested RBCs).
B) Hookworms ( Ancylostoma duodenale ) ✅ (. They attach to the intestinal wall and suck blood).