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Query: UMLS:C0021051 (immunodeficiency)
 71,517 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Childhood human immunodeficiency virus (HIV) infection is common in most regions of sub-Saharan Africa. Acute and chronic respiratory diseases are major causes of morbidity and mortality in HIV-infected children. They represent a significant added burden in a region where diagnostic capabilities are limited and management decisions are often made on the basis of clinical guidelines alone. Pneumocystis carinii pneumonia is now recognised as an important cause of acute severe pneumonia and death in HIV-infected infants. However, there are few data on incidence and aetiology for more treatable conditions such as bacterial pneumonia. The association of pulmonary tuberculosis and HIV infection is uncertain, and the diagnosis is further confused by the presence of lymphoid interstitial pneumonitis and other chronic HIV-related pulmonary disease. This article reviews the literature and highlights the urgent need for further research in order to improve clinical management and appropriate interventions.
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PMID:Pulmonary disease in HIV-infected African children. 1126 11

The introduction of highly active antiretroviral therapy with protease inhibitors in 1996 has changed the morbidity and mortality of acquired immune deficiency syndrome patients. Therefore, the aetiologies and prognostic factors of human immunodeficiency virus (HIV)-infected patients with life-threatening respiratory failure requiring intensive care unit (ICU) admission need to be reassessed. From 1993 to 1998, we prospectively evaluated 57 HIV patients (mean+/-SEM age 36.5+/-1.3 yrs) admitted to the ICU showing pulmonary infiltrates and acute respiratory failure. A total of 21 and 30 patients were diagnosed as having Pneumocystis carinii and bacterial pneumonia, respectively, of whom 13 and eight died during their ICU stay (p=0.01). Both groups of patients had similar age, Acute Physiology and Chronic Health Evaluation (APACHE) II score, and severity in respiratory failure. The number of cases with bacterial pneumonia admitted to ICU decreased after 1996 (p=0.05). Logistic regression analysis showed that (APACHE) II score >17, serum albumin level <25 g.(-1), and diagnosis of P. carinii pneumonia were the only factors at entry associated with ICU mortality (p=0.02). Patients with bacterial pneumonia are less frequently admitted to the intensive care unit after the introduction of highly active antiretroviral therapy with protease inhibitors in 1996. Compared to the previous series, it was observed that the few Pneumocystis carinii pneumonia patients that need intensive care still have a bad prognosis.
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PMID:Reappraisal of the aetiology and prognostic factors of severe acute respiratory failure in HIV patients. 1130 62

The epidemiology and natural history of bacterial infections among ambulatory patients with advanced human immunodeficiency virus (HIV) disease has not been well described. In this prospective study, 394 subjects were enrolled and followed at 8-week intervals for a median of 21 months. During follow-up, 164 (42%) of 394 patients developed at least 1 bacterial infection. The most common infections were sinusitis, bacterial pneumonia, skin and soft tissue infection, and bronchitis. Serious bacterial infections (defined as bacterial pneumonia, bacteremia, or deep visceral abscess) were reported by 56 subjects (14%). Female sex, age of <40 years, and Karnofsky score of < or =80 were independent risk factors for bacterial infections. Prophylaxis with clarithromycin, trimethoprim and sulfamethoxazole, or both had significant protective effect. The occurrence of any confirmed bacterial infection was associated with a significantly increased risk of mortality. This study documents that bacterial infections are common among patients with advanced HIV disease, especially among women.
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PMID:Impact of prophylaxis for Mycobacterium avium complex on bacterial infections in patients with advanced human immunodeficiency virus disease. 1134 May 34

The presented study examined the incidence, risk factors and outcome of nosocomial bacterial pneumonia (NBP) in human immunodeficiency virus (HIV)-infected subjects. Forty-two cases of NBP were ascertained by a 5-yr prospective surveillance and were matched to 84 controls. NBP incidence was 10.8 per 10,000 hospital patient-days. In particular, the incidence of NBP was 13.9 per 10,000 patient-days in the period 1994-1996 and 5.6 per 10,000 patient-days in the period 1997-1998 (p=0.01). By using regression analysis, predictors for developing NBP were an increasing value of Acute Physiology and Chronic Health Evaluation (APACHE) III score (p<0.01) and the presence of acquired immune deficiency syndrome (AIDS)-related central nervous system (CNS) diseases (p=0.01). The additional hospital stay attributable to NBP was 15 days. The attributable mortality rate was estimated to be 29%. Nosocomial bacterial pneumonia is more common in patients with advanced human immunodeficiency virus infection, high Acute Physiology and Chronic Health Evaluation III score and central nervous system diseases. Although the incidence of nosocomial bacterial pneumonia, as well of other opportunistic infections, decreased considerably in the era of highly active antiretroviral therapy, it still represents an important cause of mortality.
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PMID:Nosocomial bacterial pneumonia in human immunodeficiency virus infected subjects: incidence, risk factors and outcome. 1140 Oct 57

A 33-year-old Hispanic woman with newly diagnosed human immunodeficiency virus (HIV) infection, a CD4 T-lymphocyte count of 2, viral load of 730,000 copies/mL, candidal esophagitis, seizure disorder, a history of bacterial pneumonia, and recent weight loss was admitted with tonic clonic seizure. On admission, her vital signs were: pulse of 88, respiration rate of 18, temperature of 37.7 degrees C, and blood pressure of 126/76. Her only medication was phenytoin. On examination, the patient was found to have multiple umbilicated papules on her face, as well as painful, erythematous, large, punched-out ulcers on the nose, face, trunk, and extremities of 3 months' duration (Fig. 1). The borders of the ulcers were irregular, raised, boggy, and undermined, while the base contained hemorrhagic exudate partially covered with necrotic eschar. The largest ulcer on the left mandible was 4 cm in diameter. The oral cavity was clear. Because of her subtherapeutic phenytoin level, the medication dose was adjusted, and she was empirically treated with Unasyn for presumptive bacterial infection. Chest radiograph and head computed tomography (CT) scan were within normal limits. Sputum for acid-fast bacilli (AFB) smear was negative. Serologic studies, including Histoplasma antibodies, toxoplasmosis immunoglobulin M (IgM), rapid plasma reagin (RPR), hepatitis C virus (HCV), and hepatitis B virus (HBV) antibodies were all negative. Examination of the cerebrospinal fluid was within normal limits without the presence of cryptococcal antigen. Blood and cerebrospinal cultures for bacteria, mycobacteria, and fungi were all negative. Viral culture from one of the lesions was also negative. The analysis of her complete blood count showed: white blood count, 2300/microl; hemoglobin, 8.5 g/dL; hematocrit, 25.7%; and platelets, 114,000/microl. Two days after admission, the dermatology service was asked to evaluate the patient. Although the umbilicated papules on the patient's face resembled lesions of molluscum contagiosum, other infectious processes considered in the differential diagnosis included histoplasmosis, cryptococcosis, and Penicillium marnefei. In addition, the morphology of the ulcers, particularly that on the left mandible, resembled lesions of pyoderma gangrenosum. A skin biopsy was performed on an ulcer on the chest. Histopathologic examination revealed granulomatous dermatitis with multiple budding yeast forms, predominantly within histiocytes, with few organisms residing extracellularly. Methenamine silver stain confirmed the presence of 2-4 microm fungal spores suggestive of Histoplasma capsulatum (Fig. 2). Because of the patient's deteriorating condition, intravenous amphotericin B was initiated after tissue culture was obtained. Within the first week of treatment, the skin lesions started to resolve. Histoplasma capsulatum was later isolated by culture, confirming the diagnosis. The patient was continued on amphotericin B for a total of 10 weeks, and was started on lamivudine, stavudine, and nelfinavir for her HIV infection during hospitalization. After amphotericin B therapy, the patient was placed on life-long suppressive therapy with itraconazole. Follow-up at 9 months after the initial presentation revealed no evidence of relapse of histoplasmosis.
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PMID:Disseminated histoplasmosis presenting as pyoderma gangrenosum-like lesions in a patient with acquired immunodeficiency syndrome. 1170 24

Among individuals living with human immunodeficiency virus (HIV), studies have found that smokers are at greater risk than nonsmokers to develop bacterial pneumonia, oral lesions and acquired immune deficiency syndrome (AIDS) dementia complex. Information is lacking regarding the prevalence of cigarette smoking among people living with HIV or about their intentions to quit smoking. A survey was conducted with a sample of patients attending an HIV outpatient clinic at San Francisco General Hospital to assess the prevalence of cigarette smoking and the level of interest in quitting. In total, 228 assessments were completed. Study results revealed a high percentage of smokers among our sample of individuals living with HIV compared to the percentage of smokers found in the general adult population. A total of 123 individuals (54%) reported that they smoked cigarettes. Men were more than twice as likely to have made previous attempts at smoking cessation than were woman. The majority of cigarette smokers (63%) reported that they were currently thinking about quitting. Respondents' preferences for types of smoking cessation methods are discussed, and recommendations are proposed for identifying and treating tobacco dependence in this population.
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PMID:Cigarette smoking and the desire to quit among individuals living with HIV. 1183 17

A cohort of 1792 human immunodeficiency virus (HIV)-positive and 2970 HIV-negative South African miners was observed for 12 months starting in February 1998. All-cause hospitalizations and deaths were significantly associated with HIV infection (respective unadjusted incidence rate ratios, 2.9 and 9.2; respective 95% confidence intervals, 2.5-3.4 and 5.5-16.0). Tuberculosis (TB), bacterial pneumonia, cryptococcosis, and trauma were the major causes of admission for HIV-positive patients, whereas Pneumocystis carinii pneumonia was an uncommon cause (respective admission rates, 8.5, 6.9, 2.2, 6.0, and 0.53 admissions per 100 person-years). Enteritis, bronchitis, urinary tract infections, and soft-tissue infections were also significantly associated with HIV infection. Cryptococcosis caused 44% of deaths among HIV-positive patients. Trauma was the main hazard for HIV-negative men, causing 42% of admissions and 60% of deaths. A broad range of infectious conditions is significantly associated with HIV infection in South African miners. Identification and implementation of effective prophylactic regimens are urgently needed.
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PMID:Morbidity and mortality in South African gold miners: impact of untreated disease due to human immunodeficiency virus. 1194 52

Human immunodeficiency virus (HIV)infection is usually followed by opportunistic infections, especially in the full-blown acquired immunodeficiency syndrome (AIDS). This study details the histopathological changes of different organs in relation to HIV infection, with particular emphasis on the opportunistic infections. Various organs from seventeen HIV-infected patients were collected by necropsy and analyzed for histopathological changes. The major histopathological changes included cytomegalovirus infection, cryptococcosis, penicilliosis, bacterial pneumonia, cryptosporidiosis, pneumocystosis, candidiasis, tuberculosis, granulomatosis of unknown etiology, early cirrhosis and chronic active hepatitis. General organ changes from seventeen cases of HIV-infected patients were described and discussed.
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PMID:Necropsy in HIV-infected patients. 1211 67

In human immunodeficiency virus (HIV)-infected patients, bacterial lower respiratory tract infections are the most frequent respiratory diseases. They are frequently the first clinical manifestation of HIV infection. The incidence and severity of bacterial lower respiratory tract infections increase with the degree of immunosuppression. At the acquired immune deficiency syndrome (AIDS) stage, the responsible bacteria and clinical presentation may be atypical. Bacterial pneumonia may be fatal, particularly in AIDS patients, and its occurrence is predictive of a reduced survival time. Pneumococcal vaccine is recommended in patients with a CD4 T-lymphocyte count of > 200 cells mm(-3) and cotrimoxazole (trimethoprim/sulfamethoxazole) in patients with a CD4 T-lymphocyte count of < 200 cells x mm(-3). Unfortunately, such prophylaxis remains insufficiently prescribed and its protective effect is limited. Highly active antiretroviral treatment has dramatically reduced the incidence of lower respiratory tract infection due to Pseudomonas aeruginosa and opportunistic bacteria. In contrast, successful highly active antiretroviral therapy slightly decreased the risk of bacterial pneumonia due to usual bacteria, even in patients on successful highly active antiretroviral therapy.
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PMID:Pyogenic bacterial lower respiratory tract infection in human immunodeficiency virus-infected patients. 1216 45

The prevalence of bronchiectasis decreased due to the effective use of vaccines and advances of antibiotic therapy after 1970. However, it remains an important long-term morbidity of lower respiratory tract infection in developing country. To evaluate the clinical features of bronchiectasis in a tertiary hospital, we collected 21 patients with a diagnosis of bronchiectasis in Taipei Veterans General Hospital from May, 1984 to Dec, 2001 in pediatric outpatient with the admission of age below 18 years old. The diagnosis was based on the history of recurrent cough with fetid sputum, hemoptysis, or recurrent lobar pneumonia for months at least and radiological findings of lobar infiltration, tram-track like patterns, bronchiolar dilatation or honeycomb patterns. The diagnostic examinations included chest plain radiography, bronchography and chest computed tomography (CT) scans. Respiratory tract infections were the commonest cause predisposing to bronchiectasis in our study. Tuberculosis is not rare in this study. In recent years, immunodeficiency disorders have been recognized. Most patients suffered from recurrent cough and fetid sputum for years before diagnosis was established. Hemoptysis was the second common symptom in our study. The plain chest radiograph of bronchiectasis revealed dilatation of bronchial trees with honeycomb pattern or infiltration only. In recent years, chest CT became the most accurate and being noninvasive diagnostic tool. The initial treatment was primarily medical conservative therapy. Only five patients in our cases underwent pulmonary resection due to persistent hemoptysis, recurrent bacterial pneumonia or pulmonary parenchyma destruction. Most patients still suffered from recurrent pneumonia or occasional exacerbation in the long-term follow-up. In conclusion, bronchiectasis is not uncommon in pediatric population in northern Taiwan. The history of recurrent cough with fetid sputum, hemoptysis, or recurrent pneumonia were the most important clues to early diagnosis of this disease. Early diagnosis and appropriate treatment are effective in order to prevent lung abscess, empyema and pneumothorax, bronchopleural fistula, hemoptysis or cor pulmonale.
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PMID:Clinical spectrum of bronchiectasis in children. 1260 83


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