Direct life cycles occur when the egg or larval stage of the parasite directly infects the definitive host (usually by ingestion) and develops into the adult stage of the parasite.
(Direct life cycles; occur; T:when the egg or larval stage of the parasite directly infects the definitive host (usually by ingestion) and develops into the adult stage of the parasite) (the egg or larval stage of the parasite; directly infects; the definitive host (usually by ingestion) (the egg or larval stage of the parasite; develops; into the adult stage of the parasite)
Direct life cycles the egg or larval stage of the parasite the egg or larval stage of the parasite
occur directly infects develops
T:when the egg or larval stage of the parasite directly infects the definitive host (usually by ingestion) and develops into the adult stage of the parasite
the definitive host (usually by ingestion
into the adult stage of the parasite