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The genus  Entamoeba  includes a variety of widely distributed species adapted to live in the digestive tracts of humans and a large variety of animals of different classes. The objective of this study was to investigate the prevalence, distribution, and molecular epidemiology of  Entamoeba  spp. in different classes of hosts in Brazil. Studies that analyzed hosts from several classes, including humans and domestic, wild, or captive animals, were considered. The pooled prevalence of  Entamoeba  spp. was calculated using the random-effects model. A total of 166 studies on humans and 16 on animals were included. The prevalence of  Entamoeba  spp. in the Brazilian population was 22% (95% CI: 21–24). The state with the highest prevalence was Paraiba with 72%, followed by Federal District with 53%, and Rondonia with 50%. In immunocompromized patients, the prevalence was 18%, and cancer (36%) was the most prevalent cause of immunosuppression. The prevalence of  Entamoeba  spp. in animal hosts was 12% (95% CI: 7–17). Captive wild animals and domestic farm animals showed the highest prevalence, with 16% and 15%, respectively. The species found more often were  E. coli  (86.5%),  E. dispar  (7.9%), and  E. histolytica  (3.1%). In conclusion, a high prevalence (22%) of  Entamoeba  spp. was found in the Brazilian population, with a prevalence of up to 50% mainly in the northern, northeastern, and central-western regions. The pathogenic species  E. histolytica  is distributed in most Brazilian regions, with significant prevalence percentages. Among animals, unidentified  Entamoeba  species were most prevalent in mammals.

Diversity, geographical distribution, and prevalence of Entamoeba spp. in Brazil: a systematic review and meta-analysis