What is the recommended treatment for Entamoeba histolytica infection?

• A. Trimethoprim/sulfamethoxazole
• B. Metronidazole/Iodoquinol
• C. Azithromycin
• D. Rifaximin

Answer: (B)

The recommended treatment for Entamoeba histolytica infection is effectively addressed by the combination of metronidazole and iodoquinol. This is because metronidazole is a nitroimidazole that works by causing DNA damage to the amoeba, leading to its death. It is particularly effective for the acute phase of the infection, including symptomatic cases with intestinal manifestations.

Iodoquinol, on the other hand, is used to help eradicate the organism from the intestinal lumen and to prevent relapse after initial treatment with metronidazole. The combination of these two medications not only provides a comprehensive treatment but also helps in addressing both the symptomatic and asymptomatic forms of the infection.

The other treatment options listed are not considered standard for Entamoeba histolytica. While trimethoprim/sulfamethoxazole and azithromycin have activity against some protozoa and bacteria, they lack the specific action needed to target E. histolytica effectively. Rifaximin is primarily effective against non-invasive strains of E. coli and is not indicated for amoebic infections. Thus, the combination of metronidazole with iodoquinol stands as the most effective and recommended approach to treat Entamoeba hist