Infectivity and pathogenicity of Bordetella bronchiseptica to rabbits were investigated by intranasal inoculation of the organism to suckling and young animals. Results are summarized as follows. 1. By inoculation of 5 X 10(4) and 10(6) organisms, the infection developed in 60% and 100% of young rabbits, respectively. 2. In young rabbits, the growth of the organism was evident in the trachea wi...

This study investigates the association between particulate air pollution and mortality from cardiovascular and respiratory diseases among the elderly in the city of Rio de Janeiro. Death counts, levels of total suspended particles (TSP), and meteorological data were obtained from secondary databases. Daily counts of deaths and daily TSP levels from 1990 to 1993 were analyzed in Poisson regress...

Findings We found differences of between 20-fold and 60-fold between centres in the prevalence of symptoms of asthma, allergic rhinoconjunctivitis, and atopic eczema, with four-fold to 12-fold variations between the 10th and 90th percentiles for the different disorders. For asthma symptoms, the highest 12-month prevalences were from centres in the UK, Australia, New Zealand, and Republic of Ire...

Evans, N., Robinson, V. P., and Lister, J. (1972). Archives of Disease in Childhood, 47, 589. Growth and bone age of juvenile diabetics. The growth of a group of juvenile diabetics on restricted carbohydrate diets has been studied using standardized techniques. Most patients were distributed between the 10th and 90th centiles for height, weight, bone age, and subscapular skinfold thickness. The...

Polydisperse glass microsphere standards were analysed by 25 international teams of particle metrology specialists using unambiguous methods such as microscopy, sedimentation, electroformed sieving and Coulter counting. The nominal size distributions were: 1-10, 3-30, 10-100 and 50-350 microns (m). The Laser Diffraction Proficiency Testing Scheme (LDPTS) then sent the samples to about 65 parti...

In large sample studies where distributions may be skewed and not readily transformed to symmetry, it may be of greater interest to compare different distributions in terms of percentiles rather than means. For example, it may be more informative to compare two or more populations with respect to their within population distributions by testing the hypothesis that their corresponding respective...

Fusion of the neural arches was studied in 6 serially sectioned human foetuses aged 9 and 10 weeks. In foetuses of 9 weeks, the completion of arches was observed in the cervical, upper thoracic, and middle thoracic regions of the vertebral column. During the 10th week of development, fusion of neural processes progresses in the lower thoracic and upper three lumbar vertebrae.

In this paper, we sought to document household income volatility as experienced by children over time, as one understudied aspect of household economic circumstances that might contribute to observed socioeconomic differences in children’s achievement. Our analysis of six panels of the nationally representative Survey of Income and Program Participation (SIPP) across a 25-year period reveal tha...

PURPOSE To construct new Korean reference curves for birth weight by sex and gestational age using contemporary Korean birth weight data and to compare them with the Lubchenco and the 2010 United States (US) intrauterine growth curves. METHODS Data of 2,336,727 newborns by the Korean Statistical Information Service (2008-2012) were used. Smoothed percentile curves were created by the Lambda M...

In this prospective community-based study, a symphysis-fundal height chart was constructed, derived from 403 measurements in 83 women, in a local rural population. Using the recommended Cardiff chart, 132 measurements (32.9%) were below the 10th centile line, while only two measurements were above the 90th centile line. This may indicate that a high percentage of the Tanzanian fetus are growth ...