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Biomedical subjects

B Dupont

Publications and source records attributed to B Dupont.

569 records · Page 32Linked to original sources
PubMedDate not supplied

[Pseudotumoral naso-sinusal aspergillosis stabilized by itraconazole].

A 25 year-old non-immunocompromised African man showed a sino-orbital aspergillosis involving mostly the sphenoïd sinus, presenting as a growing tumour. Histopathologic study of the specimen biopsy revealed granulomata with intracellular septum branching hyphae. The electrosyneresis demonstrated serum antibodies to Aspergillus flavus. Initial treatment consisted of only surgical debridement in association of standard antifungal therapy (miconazole). After 14 months, a recurrence of the aspergillosis was stopped by the administration of itraconazole, an oral triazole antifungal. This treatment was performed during a period of 12 months and marked clinical improvement was observed. No adverse effects were noted. Itraconazole may be useful in therapy for extra-pulmonary aspergillosis when standard therapy has failed.

Adult↗
PubMedDate not supplied

[Plasmodium falciparum malaria attacks with low or negative parasitemia on returning from areas of endemic resistance to 4-aminoquinolines].

Twelve recent cases of Plasmodium falciparum malaria presented with unusual clinical and laboratory features. All patients had regularly been taking adequate doses of amino-4-quinolines as prophylaxis. In most cases the symptoms were mild as compared with those in a group of 20 control patients with typical malaria. More surprisingly, parasitaemia was either negative or very weakly positive (less than 1000 infested erythrocytes per mm3). All cases occurred in people returning from areas in which resistance of P. falciparum to these drugs is endemic. Diagnostic problems could be solved in most patients by new immunological techniques relying on the detection of parasitized erythrocytes and plasmodium antigens using a battery of monoclonal antibodies. A physiopathological model explaining why parasitaemia is negative in such cases is suggested.

Amodiaquine↗
PubMedDate not supplied

Prenatal identification of paternity. HLA typing helpful after rape.

The HLA antigens system is extremely polymorphic, and HLA typing is now widely used for both the exclusion and the positive assignment of paternity. We have also used HLA typing for identification of paternity of fetal cells in a pregnancy detected a few weeks after the rape of a woman. The HLA typing indicated that the father of the fetus was the woman's husband, with a probability of 25:1 (96%), before the time the rapist could also be tested. Subsequently, the accused rapist was excluded as a potential father because he lacked all of the paternal antigens detected in the fetus. This prediction was confirmed after delivery.

Adult↗
PubMedDate not supplied

[Phlebitis of infectious etiology].

Various infections are sometimes at the origin of phlebitis. Because of the different therapeutic consequences, this etiology should be considered whether it is a case of deep phlebitis of a limb, migratory recurrent phlebitis, or the type of phlebitis called "iron wire". The principal diseases that may lead to phlebitis are : tuberculosis, typhoid fever, rickettsiosis, and streptococcal, staphylococcal, and pneumococcal infections. Certain viruses may have a role but so far there is no formal proof. Focal pathology of dental or tonsillar origin involves in some cases an aseptic venous lesion. Bacterial or mycotic suppurative thrombophlebitis related to an intravenous catheter is the price paid for the use, often unnecessarily, of this method of perfusion.

Bacterial Infections↗
PubMedDate not supplied

Sex hormone effects on Phialophora verrucosa in vitro and characterization of progesterone receptors.

To determine the effects of sex steroid hormones on the growth of an aetiologic agent of chromoblastomycosis, we studied the dematiaceous fungus Phialophora verrucosa. The in vitro growth of this species on culture media containing either progesterone, testosterone or oestradiol at various concentrations was assessed. Both progesterone and testosterone inhibited the growth of P. verrucosa, whereas oestradiol did not. In other experiments, fungal cytosolic fractions were obtained and steroid binding assays were performed. These studies showed that the presence of progesterone receptors possessed two binding sites as determined by Scatchard analysis, one of which has a high affinity to progesterone (Kd = 6.02 x 10(-8) M) with total binding sites of 120 fmol micrograms-1 protein. These findings suggest that the growth of P. verrucosa is regulated by steroid hormones and that the effect of progesterone could be mediated through fungal intracellular progesterone receptors.

Antifungal Agents↗
PubMedDate not supplied

Possible pathogenic role for Sporothrix cyanescens isolated from a lung lesion in a heart transplant patient.

Sporothrix cyanescens is a fungus rarely isolated from human specimens. Its pathogenic role has never been demonstrated but has been postulated on the basis of its occurrence in normally sterile body sites, its isolation from debilitated individuals and its thermotolerance. A first case of nodular pulmonary lesions developing in an immunosuppressed, heart transplant patient is reported. Sporothrix cyanescens was isolated from a fine needle lung biopsy. The patient failed to respond to itraconazole therapy, whereas he was successfully treated with amphotericin B.

Amphotericin B↗