Management of hypertension in Mamre women

A follow-up study was conducted in December 1987 on all 136 women between the ages of 25 and 64 years who had been recorded as being on treatment for hypertension in the Mamre Community Health Project in December 1986. A further 136 women were randomly selected from the same age category to determine the overall prevalence of hypertension. The repeatability and validity of the 1986 project questionnaire were satisfactory. The overall prevalence of hypertension in Mamre women was 25.9% (16.1% for the age group 25-44 years and 38.4% for the age group 44-64 years). The extent of underdiagnosis of hypertension in the community on the basis of the 1986 survey was 56.8%. Despite a good reported compliance rate of 72.7%, 56.3% of hypertensives were not adequately controlled. The Mamre community presents an ideal setting for an interventive study in the management of hypertension.     

Integration of bilateral whisker stimuli in rats: role of the whisker barrel cortices.

Recently, we demonstrated that neural responses within the whisker region of the primary somatosensory cortex (SIw) of rats are profoundly influenced by the spatiotemporal attributes of ipsilateral, as well as contralateral, whisker stimuli. As inactivation of one SIw eliminates in the intact SIw both ipsilaterally evoked responses and the influence of ipsilateral stimulation on contralaterally evoked activity, we proposed that interhemispheric interactions between the SIws may be important for integrating bilateral whisker information. To test whether rats can recognize the bilateral nature of a whisker stimulus, we developed a tactile discrimination task that required rats to conjointly determine distances to a left and a right discriminandum as equidistant or non-equidistant using only their facial whiskers. All rats trained in this task achieved performance levels indicative of an ability to integrate bilateral whisker information. Testing during unilateral, as well as bilateral, inactivation of the SIws indicated that rats rely on both SIws for detecting the bilateral nature of a whisker stimulus. Rats were unable to perform the task without both sets of whiskers, a fact that indicates that the whiskers (and not other modalities) were used to perform this task. The findings presented here indicate that rats can solve a task that requires the conjoint detection of left and right whisker-mediated distance information and implicate the SIws as central to this ability.     

Endoscopic reconstruction of traumatic membranous urethral transection

Newer endoscopic techniques derived from percutaneous renal manipulations are well suited for endoscopic reconstruction of traumatic short total membranous urethral transections. Four men and 1 child underwent successful endoscopic membranous urethral reconstruction. All 4 men are voiding with good flow and normal control more than 1 year after any endoscopic manipulation.     

Chloroplast and mitochondrial DNA are paternally inherited in Sequoia sempervirens D. Don Endl

Restriction fragment length polymorphisms in controlled crosses were used to infer the mode of inheritance of chloroplast DNA and mitochondrial DNA in coast redwood (Sequoia sempervirens D. Don Endl.). Chloroplast DNA was paternally inherited, as is true for all other conifers studied thus far. Surprisingly, a restriction fragment length polymorphism detected by a mitochondrial probe was paternally inherited as well. This polymorphism could not be detected in hybridizations with chloroplast probes covering the entire chloroplast genome, thus providing evidence that the mitochondrial probe had not hybridized to chloroplast DNA on the blot. We conclude that mitochondrial DNA is paternally inherited in coast redwood. To our knowledge, paternal inheritance of mitochondrial DNA in sexual crosses of a multicellular eukaryotic organism has not been previously reported.     

Ultrastructure of another spiral organism associated with human gastritis

Summary Campylobacter pylori may not be the only organism that causes active chronic gastritis in man. We report two cases of gastric infection with a spiral organism distinct fromC. pylori. The first patient is a 36-year-old female who presented with epigastric pain and abdominal colic present since childhood and who had 14 cats. Endoscopy was normal. The second patient kept two dogs. Histology of gastric mucosal biopsy specimens in both patients revealed active chronic gastritis, most severe in body mucosa. Giemsa stain revealed bacteria with four to eight spirals, 0.5 m in diameter and 3–7 m in length. The organisms had multiple sheathed flagella at the pole and smooth cell walls without axial filaments. The organisms resembled the gastric spirillum that has been seen in cats, dogs, and nonhuman primates. After antibacterial therapy with bismuth subsalicylate, amoxicillin, and metronidazole, the organisms disappeared in both patients and the gastritis healed.UnlikeC. pylori, this new spirillum prefers to colonize gastric mucosa containing parietal cells. Whereas this type of organism is a common commensal in other mammals, it appears to be associated with and a possible cause of gastritis in humans.     

Progression of self-reported symptoms in laboratory animal allergy

BACKGROUND: Laboratory animal allergy is a common illness among workers exposed to laboratory animals and can progress to symptoms of asthma. OBJECTIVES: This study evaluates the continuum of disease from allergy symptoms to asthma symptoms in a dynamic cohort of workers exposed to animals in a pharmaceutical company. METHODS: Data arose from annual questionnaires administered to workers in a surveillance program established to monitor exposure to animals and the development of allergy. The life-table method was used to compare asthma-free survival between workers with and without symptoms of allergy. A Cox proportional hazards model was used to examine the effects of covariates on the development of asthma. RESULTS: A total of 603 workers contributed 2527.4 person-years to the study over the 12.3-year period. The probabilities of experiencing asthma symptoms by the 11th year of follow-up were 0.367 for workers with allergy symptoms and 0.052 for those without allergy symptoms. The hazard ratio for asthma symptoms when comparing workers with and without allergy symptoms was 7.39 (95% CI, 3.29-16.60) after adjustment for sex and family history of allergy. Female subjects developed asthma at a rate 3.4 times that of male subjects. CONCLUSIONS: This study supports the hypothesis that laboratory animal allergy symptoms are a major risk factor for the development of asthma. It also suggests a heightened risk of asthma for women who work with laboratory animals, a finding that has not been previously reported.     

Multilocular renal cysts in adults. Possible relationship to renal adenocarcinoma

Three grossly typical multilocular renal cysts are described. In one case, results from cytologic examination of a cyst aspirate were suggestive of malignancy. In this and the second case, histologic examination revealed cysts lined by attenuated to pump epithelium, with mild cytologic atypia and clear cytoplasm. The third case, arising in the clinical setting of chronic renal insufficiency, had the above histologic features as well as papillary proliferations and septal invasion by clear cells, interpreted as a renal adenocarcinoma. Although the preoperative evaluations in each case were suggestive of a multilocular cyst, a cystic or partially necrotic adenocarcinoma could not be ruled out. The concept of renal adenocarcinoma arising in a multilocular cyst is controversial. Because the natural evolution of multilocular cysts is indolent, these papillary and clear cell changes may represent a malignant neoplasm or a peculiar atypical hyperplasia.