text: if someone gets parasites(roundworm,etc) do they remain in their body if they don't take meds? in tropical climates it is possible to ingest parasitic larvae, like roundworms, ringworms, pinworms, ets. there may be no symptoms when the larvae hatch and find a home in intestinal tracts. the larvae hatch, the adults mate and the cycle continues. or does it ? does everyone living in tropical climates need to be checked for worms, or are worms okay to have ? yes, the cycle will continue if it is not stopped.  the person with worms has to take medications (parasitic antibiotics) to get rid of them....and sometimes this can mean taking more than one round of medications, not always.  but sometimes it takes a hefty dosage of medication over a period of time to rid them all of your body.  and no, it is never good to have worms....they feed off of you (the host), and can deplete you of nutrients and vitamins, make you skinny, etc.  if you have them....get them suckers outta there!!!  as far as the locations where you can actually ingest them...that i don't know, sorry :(  good luck