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Table 2 Trypanosome infection rates in sequential feeds. Flies (Glossina morsitans morsitans) were fed parental (1738G, J10G) or F1 trypanosome clones (F1R1, F1G2) as tenerals or non-tenerals on day 18 according to infection regimes 1–4 and dissected 24–25 days later. Midguts and salivary glands (SG) were scored for the presence of each clone by colour of fluorescence

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

Infection regime Midguts Salivary glands
  Teneral feed 18 day feed Infection rate Trypanosomes present TI Trypanosomes present
Both R only G only Both R only G only
1 F1R1 42 % (8/19) na 100 % (8/8) na 0 % (0/8) na 0 % (0/0) na
2 1738G F1R1 83 % (10/12) 20 % (2/10) 0 % (0/10) 80 % (8/10) 20 % (2/10) 50 % (1/2)* 0 % (0/2) 50 % (1/2)
3 J10G F1R1 86 % (12/14) 0 % (0/12) 17 % (2/12) 83 % (10/12) 8 % (1/12) 0 % (0/1) 0 % (0/1) 100 % (1/1)
4 F1G2 F1R1 85 % (11/13) 9 % (1/11) 9 % (1/11) 82 % (9/11) 9 % (1/11) 0 % (0/1) 0 % (0/1) 100 % (1/1)
  1. Asterisk indicates that yellow hybrid trypanosomes were observed in this SG infection. TI is the transmission index (percentage of infected midguts that established SG infection). Abbreviation: na, not applicable