A fatal case of human pulmonary adiaspiromycosis is reported. The patient, a male farm laborer from Pernambuco, in the Northeastern part of Brazil, had moved to Planaltina, DF., one year prior the onset of his illness. The main clinical manifestations consisted in fever, myalgia, cough and dyspnea. After being sick for five weeks, the patient developed severe respiratory failure and died. Grossly, disseminated nodular lesions, a few millimeters in diameter, were observed throughout the lobes of both lungs. Microscopically, round structures, up to 600 microns in diameter, with a thick membrane, identified as adiaconidia of Chrysosporium parvum var. crescens, were seen in the center of the nodular lesions. These adiaconidia appeared predominantly inside microabscesses or necrotic areas, both surrounded by a granulomatous reaction. The pulmonary alveoli not affected by the nodular lesions contained an inflammatory exudate composed of macrophages and neutrophils. The finding of several non-fatal cases of the disease in the area of the Federal District suggests that adiaspiromycosis is endemic in the Central Brazilian Plateau region, where the dry, warm and windy climate, particularly from August to October, may provide the appropriate environmental conditions for the dissemination of C. parvum conidia.

Adult↗

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[Histoplasmoma with pleural effusion. Report of a case].

Pleural effusions are rare events accompanying histoplasmosis, and in general they are associated with acute forms of the disease. It is described here a case of histoplasmoma associated with pleuritic pain and pleural effusion.

Female↗

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[Experimental cutaneous leishmaniasis. III. Histopathological aspects of the developmental behavior of the cutaneous lesion induced in Cebus apella (Primates: Cebidae) by Leishmania (Viannia) lainsoni, L. (V.) braziliensis and L. (Leishmania) amazonensis].

We have studied the histopathological aspects related to the evolution of cutaneous lesions experimentally produced in the monkey Cebus apella (Primates: Cebidae) by Leishmania (V.) lainsoni, L. (V.) braziliensis and L. (L.) amazonensis. Microscopical examination of a series of biopsies obtained from these animals showed the kinetics of the cutaneous lesions regarding three species of Leishmania inoculated, as follows: 1) an initial non-specific chronic inflammatory infiltrate; 2) macrophagic nodules; 3) necrosis of parasitized phagocytic cells; 4) epitheliode granuloma; 5) absorption of the necrotic area (sometimes forming "foreign-body granuloma"); 6) a non-specific residual inflammatory infiltration; and 7) cicatrization. These pathological processes are, of course, responsible for both development and resolution of the leishmaniotic lesion. We also discuss some immunopathological mechanisms probably related with the sequential events, and that could be also responsible for the different clinical aspects found in man.

Animals↗

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[Human lagochilascariasis. 3 cases encountered in the Federal District, Brazil].

Three new cases of human infection with Lagochilascaris minor are reported. All the patients were from the state of Pará (Brazil), living in rural areas or close to the forest. They were admitted to hospitals in the Federal District due to the presence of abscesses in the region of the neck, ear, mastoid process and, in two of them, to the involvement also of the central nervous system. Microscopic examination of tissue samples taken from the lesions showed sections of eggs and worms--in different evolutive stages--identified as Lagochilascaris minor. Larvae and adult worms obtained from existing fistulae proved also to be of the same species. The three patients were treated with anthelmintic drugs and surgical excision of the lesions, with good clinical results. In two of them, however, relapsing occurred, suggesting that the drugs do not destroy the worm eggs, in spite of the apparent healing of the lesions.

Adolescent↗

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[Histopathology of the localized form of cutaneous leishmaniasis caused by Leishmania (Leishmania) amazonensis].

The microscopic changes found in the localized form of the human cutaneous leishmaniasis due to Leishmania (Leishmania) amazonensis are reported. In this form, less known than the diffuse one caused by the same species, the clinical manifestations are identical to those produced by other Leishmania species of the subgenus Viannia. There is, however, in the localized infection by L. (L.) amazonensis, a peculiar feature, only recently discovered: about 50% of the affected individuals are Montenegro-negatives. The main histologic change observed in the skin sections was the presence of groups of macrophages with a large vacuole in the cytoplasm, containing many amastigotes. The microscopic picture is similar to that found in the diffuse form of the disease, the difference being only quantitative. When in large numbers, the macrophages suffers necrosis, which generally starts at the center of the groups. First, in this process, the membrane of the parasitized cells ruptures, and the amastigotes become free; later, both cells and parasites are destroyed. The picture can be seen either in Montenegro-negative or in Montenegro-positive patients. The macrophages with amastigotes may persist in tissues for as long as 6-7 months, while in the infections due to L. (V.) braziliensis the parasites usually disappear in a few weeks.

Adolescent↗

PubMedDate not supplied

Onchocerciasis: new foci in Brazil?

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Animals↗

PubMedDate not supplied

[An unusual case of mediastinal lymphatic filariasis with pulmonary artery stenosis].

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Animals↗

PubMedDate not supplied

[Human pulmonary adiaspiromycosis. A new case of disseminated form].

A case of disseminated pulmonary form of adiaspiromycosis is reported. This is the second case of the disease found in Brasilia, DF. The patient, a 42-year-old peasant, lived in Corrente - State of Piaui, where he certainly acquired the infection. He was admitted to the Social Security Hospital, in Brasilia, with fever, chills, dry cough and dyspnea. At that time, he had been sick for about ten months and the decision of seeking medical care in Brasilia resulted from an exacerbation of the symptoms that had occurred two months before. At a right thoracotomy for a lung biopsy, disseminated white nodular lesions, a few millimeters in diameter, could be observed on the lung surface. Microscopically, round structures, 300 microns or more in diameter, identified as adiaconidia of Chrysosporium parvum var. crescens were seen in the center of some of these lesions. The tisssue response to the causative agent consisted of microabscesses, surrounded by cells in palisading arrangement, and granulomas of the mixed and foreign body types. The two kinds of lesions were thought to represent evolutive stages of the inflammatory process, and to be related to different exposures to the conidia, on separated occasions. The suppurative lesions would be recent lesions, started some weeks or a few months before, while the others, in which the granulomatous reaction predominated, were possibly older lesions, with an evolutions of at least several months.

Adult↗