Table 3.

Financial analysis of the mass medication program for enterobiasis^*

Year, Enterobius vermicularis prevalence, estimated cases (No.)/1,000 residents	Cost of treatment = No. of cases treated × cost ($8) per resident, $	Cost of contact screening = No. of contacts (3/case) × cost ($5) per screening test, $	Total annual program cost for treatment and screening, $
1993, 29%, 290	2,320	4,350	6,670
1994, 21%, 210	1,680	3,150	4,830
1995†, 680	5,440	0	5,440
1998, 1%, 10‡	2,400	0	2,400
Year, hypothetic; zero prevalence	0	0	0

^*For assumptions, see the description of the financial analysis under “Participants and methods”

^†Gives the actual initial cost of mass treatment of all ambulatory residents.

^‡Includes 290 contacts.