“…They are: Cylicodiscus gabunensis (Okokon et al, 2006b), Uvaria chamae and Hippocratea africana (Okokon et al, 2006a), Enantia chlorantha and Cymbopogon giganteus (Agbaje and Onabanjo, 1991;Kimbi and Fagbenro-Beyioku, 1996), Cymbopogon citratus and Ocimum gratissimum (Tchoumbougnang et al, 2005), Cassia singueana (Adzu et al, 2003), Stachytarpheta cayennensis (Okokon et al, 2008), Striga hermonthica and Tapinanthus sessilifolius (Okpako and Ajaiyeoba, 2004), Tetrapleura tetraptera (Okokon et al, 2007b), Setaria megaphylla (Okokon et al, 2007c), Phyllanthus amarus (Dapper et al, 2007), Homalium letestui (Okokon et al, 2006c) and the plant formula 'Agbo-Iba' shown to protect mice against Plasmodium yoelii nigeriensis infection; the herbs used in this formula were decocted for 3 h and then administered to mice orally to evaluate the prophylactic and curative activities. Although the 'Agbo-Iba' formula was prophylactic and had no apparent significant side effects in mice, the formula had no curative activity against established infection (Nwabuisi, 2002).…”