Infection of gnotobiotic calves with Escherichia coli O157 : H7 strain A84

Six colostrum-deprived, hysterotomy-derived calves were maintained under sterile conditions and fed a milk replacer diet. At five days of age, five of the calves were dosed orally with 10(9)cfu of Escherichia coli O157: H7 strain A84. They were killed after, one, two, six, 12 and 24 days, and samples were taken for bacteriological and pathological examination. The sixth uninfected control calf was killed at seven days of age and matched samples were taken for pathological comparison. The animals remained normal throughout the observation period. Bacteriological data indicated a heavy bacterial load of strain A84 throughout the gastrointestinal tract but the bacterium was not found in liver, kidney or muscle. No evidence of attaching and effacing' lesions in the small or large intestine was found although there was a mild inflammatory response in the intestinal tract, consisting mainly of infiltrating eosinophils.

Spatio-temporal variability of polynya dynamics and ice production in the Laptev Sea between the winters of 1979/80 and 2007/08

Polynyas in the Laptev Sea are examined with respect to recurrence and interannual wintertime ice production.We use a polynya classification method based on passive microwave satellite data to derive daily polynya area from long-term sea-ice concentrations. This provides insight into the spatial and temporal variability of open-water and thin-ice regions on the Laptev Sea Shelf. Using thermal infrared satellite data to derive an empirical thin-ice distribution within the thickness range from 0 to 20 cm, we calculate daily average surface heat loss and the resulting wintertime ice formation within the Laptev Sea polynyas between 1979 and 2008 using reanalysis data supplied by the National Centers for Environmental Prediction, USA, as atmospheric forcing. Results indicate that previous studies significantly overestimate the contribution of polynyas to the ice production in the Laptev Sea. Average wintertime ice production in polynyas amounts to approximately 55 km39 27% and is mostly determined by the polynya area, wind speed and associated large-scale circulation patterns. No trend in ice production could be detected in the period from 1979/80 to 2007/08.

Perspective: LaGuardia Community College Newsletter (08 December 1972)

Perspective is a periodic publication of the College produced by the Office of Communications.

Como se apresenta a orientação educacional em Salvador (Bahia) em face da legislação federal: (ênfase à Lei 5.692, de 11/08/71)

A legislação brasileira sobre Educação, principalmente a Lei 5.692/71, trouxe grande necessidade de mudança no sistema de ensino, na área da Orientação Educacional. Procurou-se, neste trabalho, determinar a viabilidade do funcionamento da Orientação em Salvador, através de uma pesquisa de campo que serviu de base para o estudo em foco, e que teve como objetivo. sondar se as novas exigências legais estão sendo atendidas. Uma síntese da à Orientação Educacional .tudo realizadd. legislação brasileira referente é apresentada como subsídio ao es Os dados levantados revelaram que, de um modo geral, a Orientação Educacional, em Salvador, se apresenta de modo satisfatório, indicando, não estar em desacordo com as determinações legais e, principalmente, com o espírito da nova lei. No entanto, a análise real e objetiva.evidenciou a existência de algumas dificuldades que interferem na qualidade da orientação, naquela cidade, como sejam: insufici ~ncia de recursos materiais e profissionais, falta de reciclagem dos orientadores, pouca assistência técnica ao ser viço, excesso de trabalho burocrático. A partir da apresentação dos resultados, foi po~ sível formular sugestões para dinamizar o processo de Orien taçao Educacional na referida cidade.

Funding was obtained from a Capes Fellowship to NM, grants CNPq Universal 481351/ 2011-6, CNPq PQ 306604/2012-4, FAPERN/CNPq Pronem 003/2011, Capes SticAmSud, and FAPESP/CEPID/Neuromat to S.R. CNPq Universal 473554/2011-9 and 480053/ 2013-8, CNPq PQ 308558/2011-1, FACEPE/CNPq-PRONEX APQ- 0203-1.05/08, FACEPE/CNPq-PRONEM APQ-1415-1.05/10, and CNAIPS to M.C

Funding was obtained from a Capes Fellowship to NM, grants CNPq Universal 481351/ 2011-6, CNPq PQ 306604/2012-4, FAPERN/CNPq Pronem 003/2011, Capes SticAmSud, and FAPESP/CEPID/Neuromat to S.R. CNPq Universal 473554/2011-9 and 480053/ 2013-8, CNPq PQ 308558/2011-1, FACEPE/CNPq-PRONEX APQ- 0203-1.05/08, FACEPE/CNPq-PRONEM APQ-1415-1.05/10, and CNAIPS to M.C

CARISPLAN Abstracts: 08-001

Contiene resumenes bibliograficos de documentos sobre planificacion y desarrollo en el Caribe, recogidos y procesados en el marco del Sistema de Informacion del Caribe.