Table 1.

Population-based trachoma prevalence surveys (baseline, impact and surveillance) conducted in Nigeria, 2002–2020

		Prevalence of TF in children 1–9 y of age				Prevalence of TT unknown to the health system in ≥15-year-oldsa
Survey type	LGAs surveyed, n	<5%: no antibiotic MDA needed	5.0–9.9%: one round of antibiotic MDA recommended	10.0–29.9%: three rounds of antibiotic MDA recommended	≥30%: five rounds of antibiotic MDA recommended	<0.2%: community-based TT surgical service not needed	≥0.2%: community-based TT surgical service needed
Baseline, LGAs (%)	449	327 (72.8)	52 (11.6)	63 (14.0)	7 (1.6)	218 (48.6)	231 (51.4)
Impact, LGAs (%)	117	89 (76.1)	14 (12.0)	14 (12.0)	0	54 (46.2)	63 (53.8)
Surveillance, LGAs (%)	31	29 (93.5)	2 (6.5)	0	0	13 (41.9)	18 (58.1)

^aUnknown to the health system is defined as a TT patient who has not been offered any form of management by a health worker.