The burden and spatial distribution of bovine African trypanosomes in small holder crop-livestock production systems in Tororo District, south-eastern Uganda

Table 2 Prevalence of different trypanosome species in Tororo district (September- November 2011)

Trypanosome species	Positive/n	Apparent prevalence^a(95%CI)	% True prevalence^b	% Herd prevalence^c	ICC^d
Overall	928/6048	15.3 (12.2-19.1)	-	91	0.11
T. vivax	813/6053	13.4 (10.6-16.8)	17.4	91	0.09
T. congolense savannah	127/6049	2.1 (1.4-3.1)	2.3	53	0.04
T. b. brucei	69/6050	1.1 (0.7-1.8)	1.2	35	0.02
T. b. rhodesiense	2/6050	0.03 (0.0-0.1)	0.03	04	0.00

^aAdjusted for intra cluster correlation using generalised estimating equation (GEE) model.
^bRogan-Gladon estimator assuming 100% specificity and sensitivities of 77.4%, 90.9%, 95%, 95% for T.vivax, T. c. savannah, T. b. brucei and T. b. rhodesiense[32], respectively.
^cDue to the local farming systems, all animals within a certain village are considered as a herd.
^dIntra cluster correlation coefficient or rate of homogeneity (rho).

ISSN: 1756-3305