Precontrol endemicity

Annual biting rate (ABR)^{§†}

Annual transmission potential (ATP)^{¶†}

Microfilarial prevalence in all ages

Microfilarial prevalence in those aged ≥ 5 years^{‡}

Mean microfilarial intensity*in all ages (mf/mg)

Mean microfilarial intensity*in those ≥ 20 yr (mf/mg)


Mesoendemic

7,300

88

40%

47%

11.2

18.7

Hyperendemic

15,470

373

60%

67%

23.9

40.0

Highly hyperendemic

85,800

4,290

80%

84%

58.9

98.0

 ^{§}Modelled annual biting rate (ABR): the average number of (S. damnosum s.str./S. sirbanum) bites to which a person is exposed during a whole year.
 ^{¶}Modelled annual transmission potential (ATP): the average number of infective larvae (L3) of O. volvulus potentially received during a whole year by a person exposed to the annual biting rate; model assumes perennial transmission.
 ^{†}Both the ABR and ATP are for a proportion of vector blood meals of human origin equal to 0.3[21].
 ^{‡}Nodule prevalence (recorded by APOC) is converted to microfilarial load in this age range[36].
 *Arithmetic mean microfilarial load per mg of skin; note that this is different to the community microfilarial load (CMFL), which is the geometric mean microfilarial load per skin snip in those aged 20 years and above)[37].