Table 2.

Infection indexes of G. p. gambiensis males and females infected with T. congolense IL1180

DPI	Sex	N	n′	n″	p	m	VC
D3	Male	15	7	0	0.466	0	0
	Female	15	11	0	0.733	0	0
	Total	30	18	0	0.600	0	0
D5	Male	15	2	0	0.133	0	0
	Female	15	6	0	0.400	0	0
	Total	30	8	0	0.266	0	0
D7	Male	15	1	0	0.066	0	0
	Female	15	0	0	0	0	0
	Total	30	1	0	0.033	0	0
D10	Male	15	5	1	0.333	0.200	0.067
	Female	15	1	1	0.066	1	0.067
	Total	30	6	2	0.200	0.333	0.066
D13	Male	15	3	2	0.200	0.666	0.133
	Female	15	6	3	0.400	0.500	0.200
	Total	30	9	5	0.300	0.555	0.166
D16	Male	10	4	3	0.400	0.750	0.300
	Female	10	3	2	0.300	0.666	0.199
	Total	20	7	5	0.350	0.714	0.249
D20	Male	11	4	4	0.363	1	0.363
	Female	8	4	4	0.500	1	0.500
	Total	19	8	8	0.421	1	0.421
Total	Male	96	26	10	0.270	0.384	0.104
	Female	93	31	10	0.333	0.322	0.107

n is the number of flies dissected; n′ represents the number of flies with procyclic trypomastigotes (midgut); n″ refers to the number of flies with metacyclic infection (proboscis); p = n′/n; m = n″/n′. The VC index was calculated according to the formula of [32]: VC = p × m, as described in the “Methods” section. DPI, day post infection