Cameroonian Medicinal Plant Extracts Demonstrate Significant In Vitro Antibacterial Activity Against Multi-Strain Shigella Bacteria

Researchers find that extracts from Tithonia diversifolia and Solanum torvum inhibit Shigella bacteria, backing traditional diarrheal treatments with science.

By: AXL Media

Published: Feb 25, 2026, 9:15 AM EST

Source: The information in this article was sourced from Xia & He Publishing Inc.

Validation of Traditional Remedies for Gastrointestinal Illness

Infectious diarrhea remains a critical global health challenge, contributing to approximately 525,000 deaths annually among children under five, according to the World Health Organization. In Cameroon, local medicinal plants like Tithonia diversifolia and Solanum torvum have long been utilized as traditional treatments for diarrheal symptoms, often without documented scientific evidence. A new study has now addressed this gap by investigating the anti-Shigella properties of these plants, aiming to provide a rigorous pharmacological foundation for their continued use in community health settings.

Systematic Extraction and Solvent Polarity Analysis

The research team employed a methodical approach to isolate the bioactive components of the plants, utilizing a process of successive maceration. By using solvents of increasing polarity, including hexane, dichloromethane, ethyl acetate, methanol, and water, the scientists produced ten distinct extracts. This systematic isolation allowed the researchers to pinpoint which specific chemical fractions held the most potent antibacterial properties. According to the study, the success of the experiment relied on this granular separation of compounds to determine how different plant elements interact with bacterial cell structures.

Identification of Potent Anti-Shigella Compounds

Laboratory evaluations revealed that the hexane extract from Solanum torvum and the dichloromethane extract from Tithonia diversifolia were the most effective at inhibiting bacterial growth. These extracts targeted Shigella flexneri and Shigella boydii with minimum inhibitory concentration values ranging from 500 to 1,000 micrograms per milliliter. While these two strains showed high sensitivity to the plant material, Shigella sonnei was identified as the most resistant strain among those tested. These findings suggest that while the plants are effective, their antibacterial impact varies significantly depending on the specific pathogen involved.