A Comprensive Review on Malaria and Efficacy Of medicinal Plants

Abstract

Herbal medicines have historically provided the foundation for modern global antimalarial protocols, contributing to the development of vital frontline therapies. This review explores the ethnobotanical landscape of traditional malaria treatments, tracing their evolution from historical medicinal plants, such as Artemisia annua, the source of artemisinin, and Cinchona officinalis, the source of quinine, to widely used indigenous remedies across tropical regions.

Several indigenous medicinal plants, including Azadirachta indica (Neem), Vernonia amygdalina (Bitter Leaf), and Cryptolepis sanguinolenta, contain bioactive compounds, including alkaloids and lactones, that have demonstrated antiplasmodial activity in laboratory studies. These plants have shown potential for reducing Plasmodium parasite levels and may help alleviate malaria-associated symptoms such as fever and anemia. In addition, commonly used household herbs such as ginger, turmeric, and lemongrass have been investigated for their potential supportive roles in managing inflammation and oxidative stress during recovery.

Malaria remains a significant global health burden and continues to drive research into naturally derived antimalarial agents. Ethnobotanical studies have documented numerous medicinal plants traditionally used for malaria treatment, with some demonstrating confirmed antiplasmodial activity in experimental models.

In Ethiopia, 51 plant species belonging to 28 families have been reported as traditional antimalarial remedies. Among the most frequently used species are Allium sativum, Croton macrostachyus, Carica papaya, and Lepidium sativum. Among the compounds investigated, aloinsoside from Aloe macrocarpa demonstrated notable activity, achieving 100% suppression of parasitaemia at a dose of 400 mg/kg in an experimental model.

Several plant extracts have also demonstrated moderate to strong antimalarial effects in mice infected with Plasmodium. For example, at an oral dose of 100 mg/kg, Ajuga remota reduced parasite levels in the blood by 77.34%, while Capsicum frutescens produced a 72.65% reduction.

Overall, these findings highlight the importance of ethnobotanical knowledge as a valuable starting point for identifying plant-derived compounds with potential antimalarial activity. However, laboratory and animal findings do not necessarily establish safety or effectiveness in humans, and further pharmacological, toxicological, and clinical studies are required before such remedies can be considered substitutes for established antimalarial treatments.