Table 3. Microfilaraemia status before and after two rounds of mass drug administration (diethylcarbamazine and ivermectin) alone or combined with vector control, Tirukoilur, India.
| Treatment in villages | Microfilaraemia prevalence (%) |
Microfilaraemia intensity
(geometric mean intensities; GMI) |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pre-mass drug administration (MDA) (1994) | Post-MDA |
Pre- MDA (1994) | Post-MDA |
||||||||
| 1997a | % decreaseb | 1999c | % decreaseb | 1997a | % decreaseb | 1999c | % decreaseb | ||||
| MDA alone | 15.19 (724) | 1.81 (609) | 88.1d | 4.74 (591) | 68.8d | 0.4804 | 0.0517 | 89.2d | 0.1174 | 75.6d | |
| MDA with vector control | 15.09 (795) | 1.24 (645) | 91.8d | 2.08 (673) | 86.2d | 0.5569 | 0.0491 | 91.2d | 0.0431 | 91.9d | |
a After two rounds of MDA (in 1995 and 1996). b Decrease with respect to pre-MDA. c No MDAs during 1997 and 1998. d P< 0.05.