Cases reported "Mansonelliasis"

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1/7. Case report: intraocular localization of mansonella perstans in a patient from south chad.

    A case of mansonella perstans infection with visual impairment and a retinal lesion is described. After a course of diethylcarbamazine and a further course of mebendazole the symptoms improved and the microfilariae blood concentration decreased. The symptoms and response to antifilarial treatment strongly suggested the intraocular localization of an M. perstans worm. ( info)

2/7. Severe mitral valve involvement in a child with hypereosinophilia secondary to parasitic infection.

    An 11-year-old boy with severe mitral regurgitation due to hypereosinophilia caused by infection with a filaria (mansonella perstans) required mitral valve replacement with a prosthetic valve. During recurrent postoperative hypereosinophilia, the patient experienced severe mitral stenosis due to thrombosis of the mitral prosthesis. Despite adequate anticoagulation, the prosthesis had to be replaced as an emergency with a second prosthetic valve. Permanent control of the eosinophil count was achieved with chronic oral steroid administration. In contrast to other microfilariae, M. perstans is non-pathogenic to humans; nevertheless, longstanding hypereosinophilia may lead to severe cardiac involvement endangering the patient's life. ( info)

3/7. Abnormal depolarizing patterns in three patients with filarial infection.

    Several authors have described a particular potential of automated depolarization analysis in detecting malaria infection as part of the routine full blood count (FBC) performed by the Cell-Dyn 4000 analyzer. In these cases, abnormal depolarizing patterns are due to the presence of leukocyte-associated malaria hemozoin, a pigment which depolarizes the laser light. In this report we describe samples from three individual patients who did not have malaria infection but showed abnormal depolarizing events. Further investigation determined that these samples were from patients infected by the nematode mansonella perstans. The observed depolarizing pattern consisted of a normal depolarizing eosinophil population and in addition an abnormal depolarizing population that showed a close "linear" relationship between "granularity" (90 degrees depolarization) and "lobularity" (90 degrees polarization). This atypical population was smaller than normal leukocytes and thus clearly different from the patterns associated with malaria infection. Abnormal depolarization patterns of M. perstans clearly do not reflect leukocyte-associated malaria hemozoin. It is possible however that the erythrocyte-lysing agent used to facilitate leukocyte analysis by the instrument may have caused microfilaria fragmentation and thus the distinctive "straight-line" features of the abnormal scatter plots ( info)

4/7. Transfusional mansonella perstans microfilariasis.

    mansonella perstans filariasis is widely distributed across the center of africa and equatorial America. We describe a case of post-transfusional M. perstans microfilariasis in a young child, affected with severe plasmodium falciparum malaria, admitted in Goundi Hospital in South of chad. A decrease of M. perstans microfilariasis in the patient's blood was observed, with no subsequent development of either clinical symptoms or eosinophilia. We suggest that, in endemic areas, transfused M. perstans microfilariae may be cleared from the blood over relatively short periods of time. It is likely that only adult worms are responsible for symptoms and eosinophilia, whereas microfilariae in the bloodstream are unable to give clinical manifestations. ( info)

5/7. mansonella perstans causing symptomatic hypereosinophilia in a missionary family.

    mansonella perstans is rarely pathogenic. The rare reports of symptomatic cases, however, include severe complications. Three cases of symptomatic hypereosinophilia with multi-organ involvement are described in a missionary family returning from tropical africa. Pathogenicity may be related to the induction of hypereosinophilia rather than direct host-parasite interactions. ( info)

6/7. Congenital intracranial filariasis: a case report.

    We present the case of a newborn with intracranial extra-axial collections which mere partially calcified. The underlying cause was shown to be filariasis which had been transmitted from the mother. ( info)

7/7. An unexpected guest in follicular fluid.

    Parasitic infection as the only or concomitant cause of infertility in Caucasian women is rare. A parasitic infection may also present itself quite unexpectedly as a coincidental finding as shown with this case report. Moving microfilariae of mansonella perstans were found in the aspirated follicular fluid of a patient who underwent in-vitro fertilization (IVF) with embryo transfer because of tubal pathology due to chlamydia trachomatis. The patient also appeared to have a schistosoma infection. To our knowledge, the presence of parasites in follicular fluid has never been reported before. We expect that infertility physicians may be confronted with parasitic infections more often, not only in patients originating from tropical countries but also in Western women as a result of a tendency to travel more frequently to exotic and (sub)tropical countries. ( info)


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