RESUMO
The purpose of the present investigation, was to analyze the sequences of 16S ribosomal genes partially amplified from 17 isolated Giardia intestinalis obtained from faces of 13 children with intestinal pathology and four symptoms-free children with intestinal pathology. Analysis was made also with Giardia Portland-I and four Giardias isolated from dogs. Children ages in both groups ranged from six to twelve years. Genomic DNA was isolated using the phenol-chloroform-isoamyl alcohol technique, and partial amplification of 16S rRNA ribosomal gene was carried out by the Polymerase Chain Reaction. Sequences of rDNA were compared with Portland-I by using CLUSTAL-W (1.81) and PHYLIP (3.6) software in order to determine phylogenic associations. Our results showed that only one isolate from symptoms-free children and three from the symptomatic children were associated with Portland I. The other isolated Giardias were associated between them and with two samples obtained from dogs that are phylogenetically distant from Portland-I. Two isolates from dog constituted a different group. These results suggest a zoonotic infection and presence of symptoms in children from the present investigation; probably it was associated with host or special characteristics of Giardia strains. The last two situations have a special epidemiological and public health interest.
Assuntos
Humanos , Animais , Criança , Giardia lamblia , Giardíase/parasitologia , Filogenia , Zoonoses , Dor Abdominal , Estudos Transversais , Giardia lamblia , Diarreia , Fezes , México , Cães/parasitologia , DNA de Protozoário/genética , DNA Ribossômico/genética , Doenças do Cão/epidemiologia , Doenças do Cão/parasitologia , Giardíase/complicações , Giardíase/epidemiologia , Giardíase/transmissão , Giardíase/veterinária , Homologia de Sequência do Ácido Nucleico , Reação em Cadeia da Polimerase , /genéticaRESUMO
Introducción. La suplementación alimentaria ha mostrado efectividad contra la desnutrición en áreas rurales. Objetivo. Evaluar el efecto de la ingestión por 9 meses de la papilla HIM-Maíz sobre el indicador peso/edad en desnutridos menores de 5 años. Material y métodos. El diseño del estudio fue experimental, prospectivo, longitudinal y de casos y controles. Se evaluó el efecto de la suplementación a la ingestión diaria, con la papilla HIM-Maíz por un período consecutivo de 9 meses (grupo estudio (GE)), sobre el estado nutricio (peso/edad) de niños desnutridos menores de 5 años en un municipio rural del estado de Hidalgo, en comparación con otro grupo de niños de las mismas características, de otro municipio, seguidos durante el mismo tiempo pero que no recibieron el suplemento (grupo control (GC)). Al GE se le realizarón 5 evaluaciones antropométricas, basal y 4 subsecuentes; al GC basal y final. Resultados. El GE menor o igual de 24 meses (n=40) mostró una Z basal de -2.5 y final de -1.93; el grupo mayor de 24 meses (n=51) -1.86 y -1.51 respectivamente. El GC iguales o menores de 24 meses (n=19) presentó Z basal de -1.72 y final de -1.76, el grupo mayor de 24 meses presentó Z -1.38. Conclusión. El suplemento papilla HIM-Maíz a los 9 y 12 meses de ingestión diaria, promueve el crecimiento en niños desnutridos de comunidades rurales