_Transfer of ova from the perianal area to fomites e.g. clothing and toilet seats
_Ova are picked up by the new host
_They are transmitted to the mouth, and swallowed.
_The ova are hatched and mature in the lower GIT (it takes 2-6wks)
_The female worm migrates, mainly at night, out of the anus to the perianal region and deposit the eggs
_May occur through finger transfer of
ova from the perianal area to the mouth.
_Retro-infection may occur where eggs are hatched in the anal-rectal area and the larvae migrate retrogradely to caecum.
Over 2 years: (children and adults): _Tabs/susp Albendazole 400mg stat
_Tabs Levamizole Adults: 120mg stat. Children 1-4 years: 40mg stat. 5-15 years: 80mg stat.
_Tabs Mebendazole 100mg BD x 3/7 or 500mg stat.
Tabs / susp Pyrantel pamoate 10mg/kg stat
Ivermectin 200 mcg/kg OD x 3/7Treatment is repeated after 10 days as viable ova are excreted at least 2 weeks after therapy.
_Treatment of the whole household
_Regular washing of hands (especially after
visiting the toilet)
_Regular washing of fomites e.g. beddings, towels, clothes and toilet.