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Table 3 Hybrid production in non-teneral flies. Summary of midgut and salivary gland (SG) infection results (Glossina pallidipes) when trypanosome clones 1738G and F1R1 were either co-transmitted in non-teneral flies (ntGR) or sequentially, with 1738G fed to teneral flies and F1R1 fed to these flies 18 days later (GR). Midguts from a subsample of flies and all SGs were scored for the presence of one or both trypanosome clones; additionally, each SG was examined for yellow hybrids. TI is the transmission index, which is the percentage of infected midguts that established SG infections

From: Dynamics of gamete production and mating in the parasitic protist Trypanosoma brucei

Cross Midguts Salivary glands
Infection rate Trypanosomes present TI Trypanosomes present per SG
Both R only G only Both R only G only Yellow (% of R&G)
ntGR 39/74 (53 %) 20/25 (80 %) 4/25 (16 %) 1/25 (4 %) 35/39 (90 %) 28/68 (41 %) 31/68 (46 %) 9/68 (13 %) 21/28 (75 %)
GR 60/66 (91 %) 20/44 (46 %) 8/44 (18 %) 16/44 (36 %) 53/60 (80 %) 21/101 (21 %) 17/101 (17 %) 63/101 (62 %) 13/21 (62 %)