Table 2. Total number of district-level population based prevalence surveys (PBPS),trachoma rapid assessments (TRA) and site-specific surveys in database from countries in Africa, summarised by source of data.

					Primary source n (%)
Country	Total number surveys	Number TRA	Number PBPS	Number Othera	Direct contactb	Published papers	Reports
Algeria	1	0	1	0	0	1 (100)
Benin	0	0	0	0	0	0	0
Botswana	0	0	0	0	0	0	0
Burkina Faso	108	0	108	0	101 (94)	0	7 (6)
Burundi	23	0	23	0	10 (43)	13 (57)	0
Cameroon	41	0	41	0	40 (98)	1 (2)	0
CAR	10	1	9	0	2 (20)	1 (10)	7 (70)
Chad	8	0	8	0	0	5 (63)	3 (38)
Cote d' Ivoire	6	0	6	0	0	0	6 (100)
Djibouti	4	0	0	4	0	4 (100)	0
Egypt	5	1	2	2	0	5 (100)	0
Eritrea	36	0	36	0	36 (100)	0	0
Ethiopia	138	0	138	0	90 (65)	21 (15)	27 (20)
Ghana	62	1	61	0	0	61 (98)	1 (2)
Guinea	20	5	15	0	0	0	20 (100)
Guinea Bissau	9	0	9	0	9 (100)	0	0
Kenya	32	2	30	0	29 (91)	0	3 (9)
Malawi	5	0	5	0	1 (20)	4 (80)	0
Mali	62	1	61	0	29 (47)	24 (39)	9 (15)
Mauritania	64	2	62	0	64 (100)	0	0
Morocco	13	0	13	0	13 (100)	0	0
Mozambique	6	0	6	0	3 (50)	0	3 (50)
Niger	53	6	47	0	53 (100)	0	0
Nigeria	282	87	195	0	157 (56)	19 (7)	106 (38)
Senegal	11	0	10	1	11 (100)	0	0
Somalia	0	0	0	0	0	0	0
South Sudan	43	13	30	0	24 (56)	17 (40)	2 (5)
Sudan	93	0	92	1	92 (99)	1 (1)	0
Tanzania	66	0	66	0	58 (88)	8 (12)	0
The Gambia	46	0	46	0	30 (65)	16 (35)	0
Togo	31	0	28	3	3 (10)	28 (90)	0
Uganda	38	0	38	0	38 (100)	0	0
Zambia	26	0	26	0	8 (31)	0	18 (69)
Total	1342	119	1212	11	901 (67.1)	229 (17.1)	212 (15.8)

^aSite specific surveys or those in which the sampling methodology was unclear and have been used to provide evidence of suspected endemicity where no district level PBPS or TRA were available;

^bDirect contact includes contact with National Control Programmes, NGOs and academic researchers.