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Distribution of the two mating types among Histoplasma capsulatum isolates obtained from an urban histoplasmosis outbreak.

The mating type distribution among the 28 Histoplasma capsulatum isolates obtained from the histoplasmosis outbreaks which occurred in Indianapolis in 1978-1979 and 1980-1981 was studied. The overall ratio of + and - types was 1:2.5. The isolates from disseminated patients showed a 1(+):1(-) ratio while the isolates from non-disseminated pulmonary cases showed a 1(+):4(-) ratio. The frequency of the + type in these outbreaks was three times higher than that of the previous study. This was due to an unusually high prevalence of the + type among the patients with disseminated histoplasmosis.

Animals↗

An outbreak of histoplasmosis at an Arkansas courthouse with five cases of probable reinfection.

An outbreak of histoplasmosis occurred at a county courthouse in Arkansas in July, 1975. Fifty cases were identified by symptoms and positive complement fixation (CF) tests and 18 others by the clinical findings alone. Only three positive CF tests (greater than or equal to 1:8) were found in a control group of 55 unexposed persons of the same age. The attack rate for 84 courthouse employees was 52%. Histoplasma capsulatum was isolated from the sputum of two cases, and from bird droppings which had been dumped from the roof of the courthouse two weeks before the epidemic's peak. Window air conditioners apparently helped to distribute infectious particles throughout the building. Nine exposed people had pulmonary calcifications and a negative tuberculin test that were taken as presumptive evidence of previous histoplasmosis. Five (55%) of these became ill. Exposed persons without pulmonary calcifications had an attack rate of 85%. The reinfected cases during convalescence had higher serum CF titers but not larger histoplasmin skin test diameters than the rest of the cases. A microdroplet aerosol of cooking oil was used to simulate air flow patterns during the exposure, and the results agreed with the hypothesized means of infection.

Adult↗

Presumed ocular histoplasmosis.

Six patients showing typical manifestations and some rare features of the presumed ocular histoplasmosis syndrome are presented and discussed in the light of present knowledge. Krypton laser photocoagulation was used in one patient with encouraging results. Histoplasmin skin testing was negative in all cases. HLA typing supported the previous findings of an association with HLA B7 but not DRw2. Although the presumed ocular histoplasmosis syndrome is not uncommon outside America the true aetiology of this condition remains obscure.

Adult↗

Mucormycosis and cutaneous histoplasmosis in a renal transplant recipient.

Mucormycosis of the palate developed in a 31-year-old man while he was undergoing immunosuppression with prednisone and azathioprine after renal transplantation. The infection was excised and did not recur. Ten years later, while still receiving immunosuppressive therapy, cutaneous histoplasmosis of the fingers developed, which was treated successfully with intravenous amphotericin B. The occurrence of mucormycosis and histoplasmosis in this man emphasizes the need to suspect uncommon infections when unusual skin lesions occur in an immunosuppressed patient.

Adult↗

[Existence of Histoplasma duboisii histoplasmosis outside continental Africa (apropos of the first Madagascar case)].

The authors report a case of histoplasmosis with H. duboisii authenticated by an histopathologic examination, serology on cross-section. The patient, a 22 year old man from comorian ascent had never left Madagascar and was working on a sugar-cane plantation. He was carrier of ulcerated and suppurated lesions in the inguinal folds and the ombilic and was to die without having received a proper treatment. It is the first case of great form histoplasmosis noticed in Madagascar, outside Continental Africa, geographical distribution area attributed until today to H. duboisii.

Adult↗

Histoplasmosis in the eastern Caribbean: a preliminary survey of the incidence of the infection.

A preliminary survey of the incidence of histoplasmosis in the eastern Caribbean was carried out. The percentages of positive histoplasmin skin test reactors in the populations studied were as follows: Barbados (4%), Trinidad (42%) and Guyana (29%). In Trinidad 69% of individuals under 60 had positive test. However a lower proportion (4%) had serological evidence of past infection with Histoplasma capsulatum. The organism was not isolated from the soil although it had been found previously in Trinidad. On this island five previously diagnosed cases of histoplasmosis were identified. The study confirmed the presence of the infection in the area and further investigations are suggested.

Health Surveys↗

Transfer factor therapy for histoplasmosis in a patient with Hodgkin's disease.

A patient with recurrent chronic histoplasmosis was diagnosed also as having Hodgkin's disease. Studies of cell-mediated immunity (CMI) demonstrated no reaction to histoplasmin by skin test, lymphocyte transformation (LT), or leukocyte inhibition factor (LIF) assay. Clinical and immunologic studies were performed during treatment with 19 doses of dialyzable transfer factor (TF) prepared from a normal donor with strong CMI against histoplasmin. Transfer of CMI to the patient was demonstrated by all three tests. All tests reverted to nonreactive during the period of observation. Repeated doses of dialyzable TF were followed by reconversion of skin tests. The LIF assay was most reactive. Reactivation of histoplasmosis occurred during antimetabolic therapy for Hodgkin's disease; however, the lesions cleared rapidly when TF was added to amphotericin B. Amphotericin B was administered at a dosage of 25 mg three times each week during the entire study.

Adult↗

Erythema nodosum in an epidemic of histoplasmosis in Indianapolis.

Eleven patients seen at the Indiana University Medical Center and the Indianapolis Veterans Administration Hospital had erythema nodosum complicating a histoplasmosis infection. A massive, severe outbreak of histoplasmosis occurred in Indianapolis between September 1978 and August 1979. Four hundred thirty-five laboratory-confirmed cases were reported, although serologic findings suggested that from 20,000 to 200,000 persons were actually infected. During this epidemic, 18 (4.1%) of 435 patients were initially seen with erythema nodosum. Ten of 11 patients seen at the Indiana University Medical Center were women, and nine of 11 patients were seen during the first half of the epidemic; race was not a predisposing factor. Seven of 11 patients had respiratory or rheumatologic complaints. None of these 11 patients had evidence of dissemination, died, or required specific antifungal treatment.

Adult↗

[Disseminated histoplasmosis in children].

Clinical features and treatment evaluation of 38 children with disseminated histoplasmosis were studied. Thirty-six cases presented the severe form and two of them showed the mild chronic type. A higher incidence of this disease was found in infants (65%) and in severe malnutrition (68%) and lethality in the overall group was 61%. Patients died either because they did not receive specific treatment or were given amphotericin for less than 15 days. These figures stress the importance of this treatment in disseminated histoplasmosis.

Amphotericin B↗

[2 cases of pulmonary histoplasmosis in combination with tuberculosis].

Two observations by the authors of a chronic cavernous histoplasmosis in a patient of 13 and a histoplasmoma of the lungs in a patient of 53 are described. The diagnosis was established by the examination of the operation material. Clinically, these patients were diagnosed as pulmonary tuberculosis cases. The attention of pulmonologists is drawn to the features and difficulties of differential diagnosis of histoplasmosis and tuberculosis.

Adolescent↗

[Disseminated Histoplasma capsulatum histoplasmosis in African AIDS patients (3 cases)].

The authors describe three cases of Histoplasma capsulatum histoplasmosis that occurred in black AIDS patients living in France but originally from Guinea and Ivory Coast. In all three cases histoplasmosis was disseminated with fever. In two cases there were cutaneous manifestations. One patient had renal insufficiency and nephrotic syndrome and another presented ulcerative colitis with histoplasma in the chorion. The outcome was favorable in two patients. These three cases are in addition to the five previously reported cases in african AIDS patients. These cases stress the need for awareness of this opportunistic infection as a complication of AIDS in patients from Black Africa.

AIDS-Related Opportunistic Infections↗

[African histoplasmosis due to Histoplasma capsulatum var. duboisii: relationship with AIDS in recent Congolese cases].

Six new cases are described for African histoplasmosis, Histoplasma capsulatum var. duboisii, from Congo. The first was an HIV sero-negative child who has been monitored for the last three years. While under treatment with ketoconazole, amphotericin B, and finally itraconazole, the development of the infection was accompanied by purulent lesions, mainly cutaneous, but also superficial and deep lymphadenopathies. As a last option, itraconazole gave very satisfactory results both during the acute phase and during long-term treatment. However, eight months after treatment had ceased, there was a relapse and the long-term treatment had to be restarted. The other cases concerned HIV sero-positive patients with disseminated infections that had all been mistaken for tuberculosis. After diagnosis of the infection in two cases, the following two years of treatment could not prevent death. A fourth case, diagnosed in December 1994, is currently undergoing treatment. The fifth subject was lost after diagnosis during follow-up, but inquires made after the discovery of the patient's death strongly indicated acquired immunodeficiency as the cause. The last of these six cases, determined as HIV sero-negative, showed large bony lesions of the spinal column associated with a sore on the thorax. Thus, in a short period of time, three or four cases of African histoplasmosis occurred which were associated with HIV infection. Only seven identical observations have previously been reported in the literature. Therefore, we believe that this mycosis should now be included in the criteria for the diagnosis and definition of AIDS in the tropics.

AIDS-Related Opportunistic Infections↗

[Generalized histoplasmosis due to endogenous reactivation of a latent infection in an HIV-seronegative man].

A 63-year-old, Dutch, HIV-seronegative man presented with anal pain and itch of 6 months' duration, a perianal ulcer and a solitary colon ulcer. Crohn's disease was suspected; the patient was treated with corticosteroids, but later died. Autopsy revealed disseminated histoplasmosis, a fungal disease rare in the Netherlands. The patient had visited Honduras. This case report illustrates that disseminated histoplasmosis may mimic Crohn's disease leading to a delay in the diagnosis.

Crohn Disease↗

Histoplasmosis--Kentucky, 1995.

Histoplasmosis is an infection resulting from inhalation of spores from the dimorphic fungus Histoplasma capsulatum; the condition primarily affects the lungs. During August 1995, the Department for Health Services, Kentucky Cabinet for Human Resources (KDHS), and local public health officials investigated two unrelated outbreaks of acute histoplasmosis in eastern Kentucky. This report summarizes preliminary findings of the investigations of these outbreaks.

Animals↗

A chronic cavitary pulmonary histoplasmosis case from Turkey.

Histoplasmosis, a disease endemic to North America, is caused by Histoplasma capsulatum. To the best of our knowledge, the chronic cavitary pulmonary histoplasmosis patient described here presents the first case in which the fungus was isolated from sputum culture in Turkey.

Chronic Disease↗

[African histoplasmosis: clinical and therapeutic aspects, relation to AIDS. Apropos of 4 cases, including a case with HIV-1-HTLV-1 co-infection].

The authors report 4 cases of African histoplasmosis in Zaïrans. The diagnostic was based ou cutaneous (4 patients), bones (3), lymph-nodes (2), and bowel-localizations (1) and was confirmed by the presence of Histoplasma duboisiis yeasts in cutaneous biopsy (4 patients), in pus of abscess or cutaneous lesions (3) and in stools (1). Two HIV seronegatives patients had a good outcome with amphotericin B. One patient died without any treatment. One HIV-1 and HTLV-1 seropositive patient had successful short-term outcome with ketoconazole. Seven others cases of association between African histoplasmosis and AIDS are noted in the literature. They suggest the opportunistic nature of this deep mycosis.

AIDS-Related Opportunistic Infections↗

[Digestive histoplasmosis in a patient with AIDS from Guadeloupe].

The authors report the case of a 45-year-old HIV and HTLV1 antibody positive male patient form French West-Indies who was infected by disseminated histoplasmosis presenting as acute diarrhea. Esophagogastroduodenoscopy revealed gastric mass and colonoscopy patchy erythematous mucosa. The diagnosis was made by histology of bone marrow specimens, upper gastrointestinal tract and colon biopsies, and late skin lesions. Initial therapy with amphotericin B and itraconazole was successful, but maintenance therapy with itraconazole alone did not prevent relapse and a fatal outcome. Disseminated histoplasmosis in AIDS patients may be present as gastrointestinal manifestations and should be kept in mind in non endemic areas such as the French West Indies.

AIDS-Related Opportunistic Infections↗

Histoplasmosis and coccidioidomycosis in individuals with AIDS. A clinical review.

Histoplasmosis and coccidioidomycosis are serious opportunistic infections in patients with AIDS residing in endemic areas of the United States and Central and South America. Prompt diagnosis requires knowledge of the clinical syndromes and diagnostic tests as well as a high index of clinical suspicion. Histoplasmosis responds well to a variety of treatments but relapses without chronic suppressive antifungal therapy. Improvements in treatment are needed in coccidioidomycosis. Research is needed to identify preventive strategies in at risk patients. These may include use of prophylactic antifungal therapy or vaccination.

AIDS-Related Opportunistic Infections↗