Investigación científica sobre genotipificación y distribución de Giardia intestinalis en humanos y caninos de América

objetive: to describe america geographical distribution of a, b, c and d giardia intestinalis genotypes founded in humans and dogs, and molecular markers and techniques used to detect them, accordingly to scientific literature. materials and methods: systematic revision was made it and 19 scientific articles were selected in which giardia intestinales human isolates were characterized; 10 of this articles reported dog isolates. results: 31,6% of the studies were made in mexico. a genotype in 89,5% and b genotype in 52,3% were reported in studies that analyzed human isolates, in front of, a genotype in 60%, b genotype in 20%, c genotype in 30% and d genotype in 20% that were reported in analyzed dog studies. pcr-rflp was the most used molecular technique, and fi-giardin gen was the most used molecular marker. conclusions: a genotype was responsible of both humans and dogs giardia intestinalis infections in america; and b, c and d genotype were identified in infections, too. findings of infected dogs with zoonotic genotypes support their role as a potential source for human infection with g. intestinalis.