ABSTRACT
OBJECTIVE: To evaluate the in vivo antiplasmodial activity and the oral acute toxicity of the Bombax buonopozense root bark aqueous extract. METHODS: The in vivo antiplasmodial activity of the root bark aqueous extract of Bombax buonopozense against early and established rodent malaria infections in chloroquine sensitive Plasmodium berghei strain in mice was investigated, and oral acute toxicity of the aqueous root bark extract of Bombax buonopozense was also evaluated in mice. RESULTS: The findings of this study revealed significant (P < 0.05) and dose dependent decrease in parasitaemia in the parasitized groups treated with varying doses of the extract (50-200 mg/kg p.o.) in both suppressive and curative tests. There was also significant decrease in parasitaemia density in the chloroquine treated group. The aqueous extract was found no toxicity in mice and the oral LD50 was determined to be greater than 5000 mg/kg. CONCLUSION: Bombax buonopozense root bark aqueous extract possesses potent antiplasmodial activity and may therefore, serve as potential sources of new antimalarial agents.
ABSTRACT
The leaves of Salacia lehmbachii are used ethnomedically across Africa for the treatment of different diseases its antimicrobial activity as well as toxicological profile were evaluated. Antimicrobial activity against clinical strains of Pseudomonas aeruginosa, Salmonella typhi, Staphylococus aureus, Shigella species, Eschericha coli and Proteus mirabilis were compared with Gentamycin. Toxicological investigation was determined by administering 100 mg/kg, 200 mg/kg and 400 mg/kg of the ethanol leaf extract to male Wistar rats for 21 days with distilled water as control. Hematological and biochemical parameters as well as the vital organs were examined. The ethanol extract inhibited the growth of P. aeruginosa, S. typhi, S. aureus, Shigella species, E. coli and P. mirabilis to varying extents. The LD50 in rats was greater than 5000 mg/kg. Toxicological evaluation of the extract did not produce any significant effect on hematological and biochemical parameters and vital organs in rats. S. lehmbachii ethanol leaf extract did not demonstrate antimicrobial activity against selected microorganisms. Neither did it show any non-toxic effect on the parameters investigated in rats. Thus the extract can be considered safe when administered orally.
ABSTRACT
OBJECTIVE@#To evaluate in vivo antimalarial activity of methanol leaf extract of Icacina senegalensis.@*METHODS@#The extract was investigated for activity against early and established malaria infections using Swiss albino mice infected with Plasmodium berghei at dose levels of 25, 50 and 100 mg/kg. Chloroquine (10 mg/kg) was used as positive control.@*RESULTS@#A dose dependent chemo-suppression of the parasites was observed at different dose levels of the extract tested with a considerable mean survival time.@*CONCLUSIONS@#The results support further investigation on components of traditional medicines as potential new antimalarial agents.
ABSTRACT
Objective: To evaluate in vivo antimalarial activity of methanol leaf extract of Icacina senegalensis. Methods: The extract was investigated for activity against early and established malaria infections using Swiss albino mice infected with Plasmodium berghei at dose levels of 25, 50 and 100 mg/kg. Chloroquine (10 mg/kg) was used as positive control. Results: A dose dependent chemo-suppression of the parasites was observed at different dose levels of the extract tested with a considerable mean survival time. Conclusions: The results support further investigation on components of traditional medicines as potential new antimalarial agents.
ABSTRACT
OBJECTIVE@#To investigate the antimalarial activity of ethanol extract of Aspilia africana (A. africana) leaf.@*METHODS@#The ethanol extract of A. africana leaf (100-400 mg/kg) was screened for blood schizonticidal effect against chloroquine-sensitive Plasmodium berghei (P. berghei) in mice both in early and established models of antimalarial studies.@*RESULTS@#The leaf extract exhibited significant (P<0.05) antiplasmodial activity in 4-day early infection and in established infection tests with a considerable mean survival time comparable to that of standard drug, chloroquine (10 mg/kg).@*CONCLUSIONS@#The findings show that ethanol extract of A. africana leaf possesses potent antiplasmodial activity which justify the use in ethnomedicine and can be developed in malaria therapy.
