U.W. Bangor - School of Informatics - Mathematics Preprints 1997
Biological and medical statistics
MSANGI, A.R., WHITAKER, C.J. & LEHANE, M.J.
Factors influencing the prevalence of trypanosome infection of
Glossina pallidipes on the Ruvu flood plain of eastern Tanzania
We report the pattern of infection of Glossina pallidipes
with Trypanosoma vivax
and T. congolense
at a site in the Coast region of eastern Tanzania,
studied between November 1993 and December 1994.
Of the 2315 flies disected 114 (4.9%) were T. congolense
positive, 77 (3.3%) were T. vivax
positive and 2 (0.1%)
were T. brucei
Fly age was determined by the pteridine fluorescence method.
Prevalence of infection was most strongly affected by month
and the linear effect of age with the interaction of month and age
having an effect for T. congolense
Sex and sex by month also have some predictive capacity when data
for T. congolense
and T. vivax
infections are combined.
In contrast to some similar studies our results suggest that the
infection rate is non-linearly related to age of the tsetse fly,
with older flies having progressively more chance of infection.
The potential biological factors underpinning these interactions
70 (1998) 143-155