Prevención da osteoporosis desde la adolescencia / Prevenþõo da osteoporose a partir da adolescÛncia / Prevention of osteoporosis from the adolescence

La pubertad es una etapa de la vida intermedia entre la infancia y la adultez, en la cual ocurren modificaciones fisiológicas sustanciales. La masa ósea varía a lo largo de la vida, observándose que llega a un desarrollo máximo alrededor de los 20 años a nivel de los cuerpos vertebrales. El riesgo de desarrollar osteorporosis en la vida futura dependerá de la cantidad y resistencia ósea máxima alcanzada por una persona al llagar a la adultez, como así también de la tasa de pérdida ósea subsecuente(AU)

Prevención da osteoporosis desde la adolescencia / Prevençäo da osteoporose a partir da adolescência / Prevention of osteoporosis from the adolescence

La pubertad es una etapa de la vida intermedia entre la infancia y la adultez, en la cual ocurren modificaciones fisiológicas sustanciales. La masa ósea varía a lo largo de la vida, observándose que llega a un desarrollo máximo alrededor de los 20 años a nivel de los cuerpos vertebrales. El riesgo de desarrollar osteorporosis en la vida futura dependerá de la cantidad y resistencia ósea máxima alcanzada por una persona al llagar a la adultez, como así también de la tasa de pérdida ósea subsecuente

Prevencao da osteoporose a partir da adolescencia

A puberdade e uma etapa da vida intermediaria entre a infancia e a idade adulta na qual ocorrem modificacoes fisiologicas substanciais. A massa ossea varia ao longo da vida, observando-se que atinge um desenvolvimento maximo ao redor dos 20 anos na regiao dos corpos vertebrais. O risco de desenvolver osteoporose na vida futura depende da quantidade e resistencia maxima ossea alcancada por um individuo ao chegar a vida adulta, assim como tambem da taxa de perda ossea a partir desta idade.

[Serological prevalence and evaluation of the risk factors of bovine enzootic leukosis in the Bogotá savannah and the Ubaté and Chiquinquirá Valleys, Colombia]. / Prevalencia serológica y evaluación de los factores de riesgo de leucosis bovina enzoótica en la Sabana de Bogotá y los valles de Ubaté y de Chiquinquirá, Colombia.

The authors present the results of a study to determine the serological prevalence of the enzootic bovine leukosis virus among dairy cows in the Sabana de Bogotá region and the Ubaté and Chiquinquirá Valleys, the principal dairying areas of Colombia. Samples were taken from 919 animals selected at random from 420 farms in 51 municipalities, in accordance with a statistical sampling procedure developed previously, based on the cattle census maintained by the Animal Health and Disease Control Office of the Instituto Colombiano Agropecuario, and the recommendations for prevalence studies of the Pan American Health Organization. The double gel diffusion technique with gp-51 antigen was used. Serological prevalence averaged 45.28% (ranging from 42.07% to 48.49%) with a confidence level of 95%. In addition, a survey was conducted to determine how much those in charge of herds knew about the disease, and to establish the incidence of certain risk factors possibly associated with distribution of the causal agent. Data obtained from 232 completed questionnaires showed that only 54.6% of farms received professional assistance. Of these, 6.6% received constant assistance, 4.4% received visits every fortnight, 51.8% received monthly visits, 14% received visits every other month and 22.95% received occasional visits.

Persistence of vesicular stomatitis virus New Jersey RNA in convalescent hamsters.

Persistence of vesicular stomatitis virus New Jersey (VSV-NJ) was studied in experimentally infected hamsters (Mesocricetus auratus). We used reverse transcription and nested polymerase chain reaction (RT-NPCR) to probe tissues of hamsters inoculated with VSV-NJ Hazelhurst. Viral genomic RNA was detected in the brain, cerebellum, spleen, liver, kidney, and lung 2 months after infection, but only in the central nervous system at 10 and 12 months. Viral messenger RNA was detected in the brain of one hamster at 2 months after infection. Replicative intermediate was detected in the spinal cord of one hamster at 12 months. These results suggest that VSV-RNA persists in animals for long periods following infection, disease, and convalescence. However, infectious virus was not recovered from tissues by conventional serial passages of tissue extracts in Vero cells or by cocultivation.

Vesicular stomatitis New Jersey virus RNA persists in cattle following convalescence.

To test the hypothesis that vesicular stomatitis New Jersey virus (VSV-NJ) persists in convalescent cattle, we used explant cultures and reverse transcription nested polymerase chain reactions to probe for viral genomic, replicative intermediate, and mRNA in two cows experimentally inoculated in the tongue 5 months earlier and three cows naturally infected 4-14 months previously. Virus was not isolated from any tissues of any animal. Sequences of the viral polymerase and nucleocapsid genes were consistently identified in the tongue and lymph nodes draining the tongue of both experimentally infected animals but not in the three naturally infected animals. Replicative intermediate but not messenger RNA sequences were detected. These results showed for the first time the long term persistence of VSV-NJ RNA in its bovine host.