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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Natural History, Complications and Prognosis
Natural History
Infections can sometimes last for years. Symptoms take from a few days to a few weeks to develop and manifest themselves, but usually it is about two to four weeks. Onset time is highly variable and the average asymptomatic infection persists for over a year. It is theorized that the absence of symptoms or their intensity may vary with such factors as strain of amoeba, immune response of the host, and perhaps associated bacteria and viruses.
Complications
In the majority of cases, amoebas remain in the gastrointestinal tract of the hosts. Severe ulceration of the gastrointestinal mucosal surfaces occurs in less than 16% of cases. In fewer cases, the parasite invades the soft tissues, most commonly the liver. Only rarely are masses formed (amoebomas) that lead to intestinal obstruction.
Entamoeba histolytica infection is associated with malnutrition and stunting of growth.[1]
- Other complications
- Liver abscess
- Medication side effects, including nausea
- Spread of the parasite through the blood to the liver, lungs, brain, or other organs
Prognosis
- The outcome is usually good with treatment.
References
- ↑ Mondal D, Petri Jr WA, Sack RB; et al. (2006). "Entamoeba histolytica-associated diarreal illness is negatively associated with the growth of preschool shildren: evidence from a prospective study". Trans R Soc Trop Med H. 100 (11): 1032&ndash, 38. doi:10.1016/j.trstmh.2005.12.012.