[Alithiasic cholecystitis in association with visceral leishmaniasis in an immunodepressed patient].
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Biomedical subjects
Publications and source records attributed to T Coton.
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The purpose of this report is to describe a case of tropical calcific pancreatitis (TCP). This disease is specific to tropical regions and constitutes the main cause of chronic pancreatitis in children worldwide. It can also be observed in young adults (2nd and 3rd decade). Shortage of dietary lipids during childhood has been implicated in the development of TCP and mutation of the SPINK1 gene has been cited as a predisposing genetic factor. The underlying pathophysiology of TCP is the same as chronic calcific pancreatitis (CCP) due to alcohol abuse. The main features are a sex ratio of 1, absence of alcohol consumption, occurrence of childhood diabetes in one third of cases, low incidence of acidoketosis, and presence of macro-calcifications especially in ducts. In 10% of cases TCP is complicated by pancreatic carcinoma occurring at an early age, located mainly in the body and tail of the pancreas, and having a less favorable prognosis than primary cancer. Treatment of patients with TCP is the same as for patients with CCP due to alcohol abuse. Prevention depends on improvement of nutritional status of the population.
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Acute infectious diarrhea is a worldwide public health problem. In developing countries it remains a major cause infant mortality despite therapeutic progress, especially with regard to the efficacy of oral rehydration, during the last two decades. Mortality in industrialized countries is much lower and generally stable. In most cases, acute diarrhea is a self-limiting illness that resolves with or without symptomatic treatment in a few days. In view of the high frequency and generally benign course of diarrheal diseases, management must emphasize a cost-effective approach with selective use of available diagnostic methods. The initial approach should be based on the patient's history, physical examination, and risk factors to identify infections that require more specific measures. The purpose of this report is to review currently available drug therapies and to describe treatment guidelines for adolescents and adults with uncompromised immune systems. Early rehydration is still the mainstay of treatment. Use of "etiological" treatment using antimicrobial or antiparasitic agents depends on the severity of disease and risk factors.
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Dengue is prevalent in all subtropical areas. Hemorrhagic forms of the disease were first described in southeast Asia but have now been observed on several continents. Travelers are at risk for infection and the likelihood of imported dengue has grown in relation to volume of air traffic. In developed countries, dengue usually presents in the benign form, but sudden aggravation is always possible. The purpose of this report is to describe a case of imported dengue hemorrhagic fever associated with abdominal pain in a traveler returning from Asia. Radiological findings were suggestive of nonlithiasic cholecystitis. Similar ultrasound feature have been reported by pediatric groups during dengue outbreaks in Asia. Previous findings have shown that bladder involvement is a predictive sign of severe disease and impending shock. Surgery is contraindicated in these patients. Close clinical and laboratory surveillance is necessary due to the high risk of aggravation. The pathogenesis of this severe life-threatening form of the disease is unclear. A possible explanation is involvement of a more virulent strain of virus. Dengue should always be considered after malaria in the differential diagnosis of returning travelers patients presenting fever.
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Nocardiopsis dassonvillei is an environmental aerobic actinomycete seldom isolated in cutaneous and pulmonary infections. We herein report the first N. dassonvillei blood isolate in a patient hospitalized for cholangitis. Although morphological characteristics and biochemical tests allowed a presumptive identification of this isolate, cell wall fatty acid chromatographic analysis confirmed identification at the genus level, and 16S rRNA gene sequencing achieved definite identification. This study illustrates the usefulness of 16S rRNA gene sequencing as a routine method for the identification of actinomycetes.
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Toxicity of polynuclear eosinophils in the digestive tract results from a cascade of immune responses involving various mediators including mastocytes and T-lymphocyte helpers. Polynuclear eosinophils may be implicated in many digestive disorders. This involvement is well established in eosinophilic gastroenteritis which has become the model for study of eosinophil toxicity on the digestive tract. Considered to be of uncertain etiology up until 1998, this mechanism is well illustrated by the case described in this report involving infiltration of all layers of the small intestinal mucosa in a 23-year-old patients who responded well to corticosteroid treatment. This case provides the opportunity to update physiopathologic and therapeutic data concerning this unpredictable syndrome. Current evidence of transition forms from idiopathic hypereosinophilic syndrome casts doubt on the conventional classification of eosinophilic gastroenteritis and underlines the need for careful diagnostic work-up and prolonged follow-up.
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Helicobacter pylori infection is probably the most common bacterial infection in the world. The pathogenicity of this bacteria has been recognized since 1989 in the developed world where prevalence is 20 to 40%. Its role in gastric and duodenal disease is certain and its low recurrence rate justifies eradication. In the developing world prevalence of Helicobacter pylori infection is over 80% with contamination being maximal in children. Transmission is oro-oral and even feco-oral. Crowded living conditions is the determinant factor. Helicobacter pylori infection exhibits special features in developing world. The prevalence of gastroduodenal disease varies according to geographic area independently of the prevalence of Helicobacter pylori infection and stomach cancer is uncommon. In newborns Helicobacter pylori infection seems to be the primary event for chronic malnutrition and diarrhea syndrome with failure to thrive. In practice detection of Helicobacter pylori is difficult in the developing world and presumptive treatment is always followed by recurrence. In the future active or passive immunization will be the solution.
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