Table 3.

Patterns of nycteribiid bat fly infestation prevalence on E. helvum sampled from the Gulf of Guinea islands

Sample group	Total bats	Bats with nycteribiids	Nycteribiid prevalence	Bats with nycteribiid count data	Nycteribiid count
Location
Bioko	105	96	0.91 (0.85–0.95)	90	2.54 (1–3)
Príncipe	62	37	0.6 (0.47–0.71)	32	2.69 (1–3)
São Tomé	103	75	0.73 (0.64–0.8)	67	2.48 (2–3)
Annobón	75	69	0.92 (0.84–0.96)	54	3 (2–4)
Age group
Neonate (<2 months; includes free-flying dependent young)	67	62	0.93 (0.84–0.97)	58	2.34 (1–3)
Juvenile (2–<6 months)	46	37	0.8 (0.67–0.89)	35	2.49 (1–3)
Sexually immature (6–<24 months)	70	57	0.81 (0.71–0.89)	50	2.34 (1–3)
Adult (≥24 months)	162	121	0.75 (0.67–0.81)	100	3.03 (2–4)
Sex
Female	162	126	0.78 (0.71–0.83)	109	2.39 (2–3)
Male	183	151	0.83 (0.76–0.87)	134	2.86 (1–3.75)

Nycteribiid prevalence was calculated based on the number of bats with nycteribiids present out of the total bats captured at the location. Binomial 95% confidence intervals for prevalence were estimated using Wilson score intervals. Nycteribiid count data are displayed as the mean count on bats with nycteribiids present (excluding zeroes); the range next to the mean is the interquartile range (IQR).