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Biomedical subjects

H D Pohle

Publications and source records attributed to H D Pohle.

At least 55 records · Page 3Linked to original sources
PubMed1991

Oral manifestations of AIDS-associated non-Hodgkin's lymphomas.

While B-cell lymphomas are frequently found in AIDS patients, reports on oral manifestations are rare. Among a group of 465 HIV-infected patients 5 presented with primary oral manifestations of a malignant B-cell lymphoma. The primary site of manifestation was the maxilla in 3 cases and the mandible in 2 cases. Based on the histological and immunohistochemical examination the tumors were differentiated as Burkitt's lymphoma (n = 1), as anaplastic large cell (ALC) lymphoma of the B-cell type (n = 1), as high-grade non-Hodgkin's lymphoma not classifiable according to the Kiel classification (n = 1), as immunoblastic-plasmoblastic lymphoma (n = 1), and as centroblastic lymphoma (n = 1). Serum samples were negative for HTLV-I antibodies in 5/5 cases.

Acquired Immunodeficiency Syndrome↗
PubMed1991

Primary intraosseous AIDS-associated Kaposi's sarcoma. Report of two cases with initial jaw involvement.

AIDS-associated Kaposi's sarcoma (KS), which in 80% of cases occurs in the oral cavity, usually presents with characteristic clinical features such as brown-bluish pigmented macules or tumorous lesions. In later stages the tumor, most probably originating from the vascular endothelium, may secondarily induce erosion of the underlying bone. The primary, intraosseous occurrence of KS has prompted the present 2 case reports. The tumor presented as extensive, diffuse osteolysis within the mandible without causing clinical symptoms. Although rare, intraosseous KS must be included in the differential diagnosis of isolated bone defects in HIV-infected patients.

Acquired Immunodeficiency Syndrome↗
PubMed1991

Hepatic involvement in patients with human immunodeficiency virus infection: discrepancies between AIDS patients and those with earlier stages of infection.

The effect of human immunodeficiency virus (HIV) infection on type and severity of liver disease was studied in 61 HIV-positive patients who did not have AIDS and in 45 AIDS patients. Liver biopsies revealed viral hepatitis in 12 of 18 non-AIDS patients but in only 4 of 34 AIDS patients (P less than .0005, Fisher's exact test). Acute, non-A non-B, and chronic active hepatitis B were seen exclusively in the non-AIDS group; however, chronic persistent hepatitis B was seen in both groups. In 9 of 18 AIDS patients intra vitam liver histopathology established diagnoses of opportunistic infections or tumors. Tissue reaction to certain pathogens, such as hepatitis B virus, mycobacteria, and cryptococci, seems to be milder in AIDS patients than in others who are HIV positive or the expected reaction of the normal host. This is likely because of impaired cell-mediated immunity in patients with advanced HIV disease.

Acquired Immunodeficiency Syndrome↗
PubMed1991

Oral Candida and Enterobacteriaceae in HIV-1 infection: correlation with clinical candidiasis and antimycotic therapy.

Oral swabs of 73 HIV-1 infected men (32 under conditions of antimycotic treatment (43.8%)) and 58 controls were cultured for Candida species and Enterobacteriaceae. In Group A without antimycotics, yeasts were isolated from 35/41 swabs (85.4%) (range 2 x 10(1) - 4 x 10(6) cfu/ml). In Group B with antimycotics, yeasts were cultured from 27/32 swabs (84.4%) (4 x 10(1) - 1 x 10(6) cfu/ml). Oral Enterobacteriaceae (o.e.) were grown from 22% of the swabs of both Group A (2 x 10(1) - 2 x 10(6) cfu/ml) and Group B (4 x 10(1) - 1.6 x 10(6) cfu/ml). Growth of o.e. and yeasts (2 x 10(3) - 4 x 10(6) cfu/ml). Correlation between yeasts and o.e. were isolated in 14% (2 x 10(1) - 6.4 x 10(6) cfu/ml). Correlation between yeasts species to local and systemic treatment deserves further investigations.

Administration, Topical↗
PubMed1991

Neuropsychiatric side effects after the use of mefloquine.

This study describes neuropsychiatric side effects in patients after treatment with mefloquine. Reactions consisted mainly of seizures, acute psychoses, anxiety neurosis, and major disturbances of sleep-wake rhythm. Side effects occurred after both therapeutic and prophylactic intake and were graded from moderate to severe. In a risk analysis of neuropsychiatric side effects in Germany, it is estimated that one of 8,000 mefloquine users suffers from such reactions. The incidence calculation revealed that one of 215 therapeutic users had reactions, compared with one of 13,000 in the prophylaxis group, making the risk of neuropsychiatric reactions after mefloquine treatment 60 times higher than after prophylaxis. Therefore, certain limitations for malaria prophylaxis and treatment with mefloquine are recommended.

Adult↗
PubMed1990

[Malaria tropica in HIV infection].

This is a case report of a 24 year-old woman who is HIV-infected since three years (stage III B, CDC). She developed malaria tropica during her touristic stay in the Cameroons, Africa. No clinical complications were detectable even though she had a high parasitemia of 18% blood cells infected with Plasmodium falciparum. After quinine therapy defervescence occurred and blood smears were continuously free of malaria parasites. P. falciparum infection may increase HIV-related immunosuppression which favours the earlier occurrence of AIDS indicative opportunistic infections. Malaria in combination with HIV-infection can lead to a higher parasitemia; this does not necessarily lead to a higher rate of complications.

Animals↗
PubMed1990

Prevalence and diagnosis of Legionella pneumonia: a 3-year prospective study with emphasis on application of urinary antigen detection.

During a 3-year period the frequency of legionellosis in hospitalized patients with community-acquired and nosocomial pneumonias was 3.4% (23/684 cases) and 5.9% (33/559), respectively. Of the diagnostic tests evaluated, detection of Legionella pneumophila serogroup 1 antigen in urine had the highest sensitivity, with 86% of culture-proven cases being positive. Sensitivities of serologic tests and examination of respiratory secretions (culture and direct immunofluorescence) were 36% and 26%, respectively. The diagnostic value of serology and of examination of respiratory secretions can be low when specimens are obtained and processed under the typical conditions of hospitalization. Urinary antigen detection represents an important diagnostic addition, and examination of postmortem lung tissue from fatal cases with pneumonia is an important adjunct for estimating the prevalence of legionellosis and for assessing the effectiveness of premortem diagnostic tests.

Antibodies, Bacterial↗
PubMed1990

Negative staining EM for the detection of Epstein-Barr virus in oral hairy leukoplakia.

The performance of two different EM techniques applied for the detection of Epstein-Barr Virus (EBV) in oral hairy leukoplakia (HL) was assessed, i.e. the conventional two-step method of negative staining (CNS) and negative staining after Airfuge enrichment (ANS). Scrape specimens from the lateral borders of tongue of 66 HIV-positive patients with or without HL, of 3 patients with infectious mononucleosis and of 10 HIV-negative patients were evaluated. While CNS resulted in virus detection only in 25% of clinically diagnosed HL cases, EBV was detected by ANS in 85% of clinically suspected cases of HL. Scrape specimens of individuals negative for HIV were negative in EM while 2 of 3 mononucleosis patients were positive without clinical evidence for HL. Due to this high sensitivity the method of negative staining after Airfuge enrichment appears to be useful in the diagnosis of HL. The finding of EBV in clinically normal oral mucosa in HIV-seropositive individuals is interesting and indicates that EBV expression may precede the clinical appearance of HL.

Adult↗
PubMed1990

[Clinical aspects and pathology of mycobacterial infections in AIDS. Pulmonary and extrapulmonary manifestations].

Infections with M. tuberculosis and other mycobacteria (atypical mycobacteria) are frequently found in patients with AIDS. They are almost always disseminated, and are associated with a spectrum of findings that is often unhelpful for the diagnosis. In the case of tuberculosis, typical granulomas are a major finding. The histological correlate of mycobacteriosis is histiocytosis; granulomas are rarely observed, and when they do present, are incompletely developed.

Acquired Immunodeficiency Syndrome↗
PubMed1990

[Hyperpigmentation of the oral mucosa in HIV infection].

In ten HIV-infected patients oral hyperpigmentations (HP) were observed, which seemed to be unrelated to any of the known endogenous or exogenous etiological factors. Light microscopy revealed accumulation of Fe-negative pigment in keratinocytes of the stratum basale as well as extra- and intracellularly within the subepithelial connective tissue. The ultrastructure of HP was characterised by the occurrence of melanosomes and premelanosomes within keratinocytes, melanocytes, macrophages and occasionally in fibroblasts, while especially in keratinocytes of the superficial cell layers immature melanosomes were found. Immunohistochemical examination pointed to an increase of HLA-DR positive cells and an altered distribution pattern of immunocompetent cells within the hyperpigmented mucosa. The finding of oral HP in HIV-infected patients may occur due to an increased activity of melanocytes, an increased production of melanosomes and their increased transfer to keratinocytes.

Adult↗
PubMed1990

[Incidence of infections with mycobacteria in HIV infected patients].

In subjects with HIV infection, mycobacteria are frequently identified. The most commonly seen species are M. avium-M. intracellulare. On the other hand, there is considerable variation in the data regarding the incidence of infections with M. tuberculosis; in fact, these data correspond with the differences in prevalence of tuberculosis in the respective general population.

Cross-Sectional Studies↗