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Table 2 Effect of ethanolic and aqueous leaf extracts of Vernonia amygdalina on Plasmodium berghei oocyst development in Anopheles stephensi mosquitoes

From: Plasmodium transmission blocking activities of Vernonia amygdalina extracts and isolated compounds

Group

Mouse IDa

Prevalence of infected mosquitoes (infected/total examined)

Oocyst density by mouse replicate (95% CI)

Oocyst density by treatment group (95% CI)

Ver-EtOH

1

76.9 (20/26)

27 (13–57)

37 (26–53)*

2

29.4 (5/17)

12 (5–28)

3

88.2 (30/34)

56 (32–96)

Sol-EtOH

4

100 (34/34)

417 (297–585)

374 (297–467)

5

96.4 (27/28)

439 (319–605)

6

95.7 (22/23)

260 (152–447)

Ver-H2O

7

100 (20/20)

72 (45–103)

123 (83–149)*

8

100 (20/20)

151 (101–161)

9

100 (20/20)

143 (104–182)

Sol-H2O

10

100 (20/20)

272 (225–319)

266 (200–300)

11

100 (20/20)

242 (186–298)

12

100 (20/20)

237 (190–284)

  1. The oocyst densities (geometric mean of oocysts/mosquito) were calculated on oocyst positive mosquitoes only.
  2. Ver-EtOH ethanolic V. amygdalina leaf extract, Ver-H 2 O aqueous V. amygdalina leaf extract, Sol-EtOH and Sol-H2O are solvent controls for the ethanolic and aqueous extract, respectively.
  3. * Oocyst density in extract treated groups significantly different with respect to the solvent controls; P < 0.05.
  4. aEach number represents one gametocytaemic treatment or control mouse used for the infection of a separate batch of mosquitoes (100–150 females per mouse).