[Severe strongyloidiasis in French Guiana. Apropos of 4 cases].
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Biomedical subjects
Publications and source records attributed to A Hulin.
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Thousands of cases of dengue fever (DF) and several cases of dengue haemorrhagic fever were recorded in French Guiana during the recent outbreak of dengue-2 virus (1991-1992) and in subsequent years. One case with clinical signs typical of classical DF with neurological complications is reported in this study. The neurological features (encephalitis) appeared during the acute phase, 2 days after the onset of fever. Dengue-2 virus was detected in both the cerebrospinal fluid and blood sample. This case was fatal. This first reported case of classical DF with encephalitis in French Guiana is a new demonstration of the potential neurovirulence of dengue viruses.
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The first case of yellow fever in French Guiana since 1902 was reported in March 1998. The yellow fever virus genome was detected in postmortem liver biopsies by seminested polymerase chain reaction. Sequence analysis showed that this strain was most closely related to strains from Brazil and Ecuador.
Two recent cases of human infection with Tonate virus, one of which was a fatal case of encephalitis, have renewed interest in these viruses in French Guiana. The clinical aspects of confirmed and probable cases of infection with this virus indicate that it has pathogenic properties in humans similar to those of other viruses of the Venezuelan equine encephalitis complex. To determine the prevalence of antibodies to Tonate virus in the various ethnic groups and areas of French Guiana, 3,516 human sera were tested with a hemagglutination inhibition test. Of these, 11.9% were positive for the virus, but significant differences in seroprevalence were found by age, with an increase with age. After adjustment for age, significant differences were found between places of residence. The prevalence of antibody to Tonate virus was higher in savannah areas, especially in the Bas Maroni (odds ratio [OR] = 22.2, 95% confidence interval [CI] = 15.2-32.4) and Bas Oyapock areas (OR = 13.4; 95% CI = 9.8-18.4). The ethnic differences observed in this study were due mainly to differences in place of residence, except that whites were significantly less frequently infected than other ethnic groups. This study indicates that Tonate virus infection is highly prevalent in French Guiana, especially in savannah areas.
We propose an evaluation of a new heterogeneous immunoassay of cyclosporin on RXL HM Dimension (Dade Behring) for therapeutic cyclosporin monitoring in whole-blood patients transplant. The pretreatment step is performed automatically into the apparatus while it is a manual step with EMIT. Linearity, intra- and inter-day precision, limit of quantification, precision and accuracy of dilution steps and stability into the equipment were studied. We realized the comparison between ACMIA and EMIT methods on whole-blood patients transplant recipients. Heterogeneous immunoassay showed a good linearity between 0 and 500 ng/mL, intra- and inter-day precision with coefficient of variation inferior to 7.2%. We observed reproducible and accurate dilutions of high concentrations (500 to 2,000 ng/mL). The correlation with EMIT technique was correct for different type of transplant (n=55).
A post-traumatic intramural hematoma of duodenum in a 9 year old child was detected during exploratory laparotomy but left undisturbed. Postoperative follow up during parenteral feeding included surveillance by repeated gastrografin follow through examinations, normal transit being restored by the 12th day. Intramural hematoma of duodenum is usually due to injury and often affects male children. Symptomatology is that of upper digestive occlusion. The principal investigation should be gastro-duodenal follow through examinations with gastrografin, because of the risk of an associated perforation, to reveal possible partial or total duodenal obstruction. Conservative treatment is possible, but in case of failure or in adults surgery is indicated with evacuation of the hematoma and in some cases a gastro-jejunostomy.