RESUMEN
The article considers molecular genetic characteristic of RNA of human enterovirus detected in bio-test from child with serous meningitis. The nucleotide sequence of genome DNA is analyzed. In 98% it is identical to corresponding nucleotide sequences of strains of human enterovirus A serotype 71 detected in China.
Asunto(s)
Enterovirus Humano A/aislamiento & purificación , Infecciones por Enterovirus/virología , ARN Viral/aislamiento & purificación , Secuencia de Bases , China , Diagnóstico , Enterovirus Humano A/genética , Infecciones por Enterovirus/diagnóstico , Infecciones por Enterovirus/genética , Infecciones por Enterovirus/mortalidad , Humanos , Meningitis/mortalidad , Meningitis/virología , Filogenia , ARN Viral/genética , Federación de RusiaRESUMEN
The authors' studies have established that the concentration of Rickettsia typhi may increase about 100-fold in the infected Ornithonyssus bacoti mites. At the time, when on feeding 20 to 200 adult mites on guinea-pigs and albino rats 4 to 36 days after inoculation, they did not transmit Rickettsia typhi on blood sucking.
Asunto(s)
Ácaros y Garrapatas/microbiología , Vectores Arácnidos/microbiología , Rickettsia typhi/fisiología , Tifus Endémico Transmitido por Pulgas/transmisión , Animales , Femenino , Cobayas , RatasRESUMEN
A race of clothes lice adapted to feeding on rabbits is kept at a laboratory longer than 50 years. For this period, more than 850 insect generations undergoing no change in a number of biological tests and morphological indices have been obtained. They have retained a high susceptibility to Provacheck rickettsia infection. All infected lice die, partially with the signs of hemolytic imbibition. Their rickettsial accumulation is as high as 10(5.0) ID50 per insect for albino rats.
