Trypanosocidal Activity of Methanolic Extract of Lemon Grass (<i>Cymbopogon citratus</i>)


  • D. Yandev Microbiology Department, University of Mkar, Mkar, Benue State
  • J. I. Ngbede Microbiology Department, University of Mkar, Mkar, Benue State
  • G. C. Abongaby Microbiology Department, University of Mkar, Mkar, Benue State
  • O. A. Idowu Biochemistry Department, Federal University of Health Sciences, Otukpo, Benue State
  • T. T. Kyernum Microbiology Department, University of Mkar, Mkar, Benue State
  • P. Adikwu Microbiology Department, Federal University of Health Sciences, Otukpo, Benue State



Disease Control, Bioinfectivity, Trypanosoma brucei, Lemon grass


This study determined the in vitro trypanocidal activity of lemon grass(Cymbopogon citratus) methanolic extract against Trypanosoma brucei brucei and its bio infectivity in an in vivo study using male albino rat as the experimental animal. Five treatment levels were applied (0.002mg/ml, 0.02mg/ml, 0.2mg/ml, 2.0mg/ml and 0.0mg/ml). Trypanosome was inactive at all treatment levels of lemongrass. PCV was statistically the same at all exposure times whereas the control mice had significantly lower PCV than all treated mice apart from the control, all other treatments gave similar PCV results, but the highest grand mean value (51.87%) was obtained at 0.02mg/ml while week 4 recorded the highest value (51.53%). All treatment levels had equal effects on the mice’s rectal temperature, but exposure time had significant effects on the temperature parameter where the grand mean temperature readings significantly varied from 35.55oC in week 2 to 37.47oC in week 5. The weight of mice varied significantly with both treatment (F=16.01, p<0.05) and time (F=5.10, p<0.05) factors. The highest mean weight recorded was 38.37±2.46g at 2.0mg/ml treatment in week 5 thus, the weight of mice increased as lemon grass treatment concentration and exposure time increased. Treatment concentrations significantly affected mice PCV and weight where the control level had the lowest values for these physical parameters. Also, exposure time significantly
affected both the temperature and weight of mice. A general fluctuation but decline in feed intake was observed in mice at different treatment levels of methanolic extracts of lemon grass from weeks 1-7. A strong positive significant correlation exists between PCV and feed intake (r= -0.930, p<0.05) as well as between rectal temperature and weight of mice (r= -0.948, p<0.05). PCV and weight had a strong positive correlation though insignificant (r= 0.728, p>0.05). Therefore, lemon grass extract showed trypanocidal efficacy in the control of trypanosomiasis in Africa.

Author Biography

D. Yandev, Microbiology Department, University of Mkar, Mkar, Benue State

Microbiology Department, Federal University of Health Sciences, Otukpo, Benue State


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How to Cite

Yandev, D., Ngbede, J. I., Abongaby, G. C., Idowu, O. A., Kyernum, T. T., & Adikwu, P. (2024). Trypanosocidal Activity of Methanolic Extract of Lemon Grass (<i>Cymbopogon citratus</i>). Nigerian Journal of Parasitology, 45(1), 64–76.

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