Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts: Gene/Protein Disease Symptom Drug Enzyme Compound   Target Concepts: Gene/Protein Disease Symptom Drug Enzyme Compound

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

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 masticator space is an important suprahyoid tissue compartment. Infection of the masticator space can break through the fascia and involve the adjacent space. Severe complications including mediastinitis, pericarditis and death have been reported. The correct diagnosis and proper management are, therefore, crucial in order to reduce this complication. The authors reviewed 22 patients with masticator space infection between July 1996 and June 2001. All of the patients presented with trismus and 18 patients (81.8%) had a suspected dental cause of infection. Five patients had underlying disease; three were diabetic and two had human immunodeficiency virus (HIV) infection. High dosage intravenous antibiotics directed towards the causative microorganism were given to all of the patients. Fourteen patients underwent surgical drainage and surgical drain was positive in eleven patients (78.5%). Routine aerobic cultures were done on samples of the drained material. Bacteriology showed Streptococcus spp. the dominant microorganism in three patients, Pseudomonas spp. in one patient and no growth in ten patients. Blood culture grew Burholderia pseudomallei in one patient who responded to medical treatment. Three patients had post-operative complications but all recovered.
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PMID:The masticator space infection. 1229 9

The antimicrobial efficacy of alcohol-based hand gels has been shown to be significantly less than liquid hand rubs probably because of a lower concentration of alcohol. Sterillium Gel is the first hand gel with 85% ethanol. Its antimicrobial efficacy and user acceptability was studied. Bactericidal activity was tested according to prEN 12054 against Staphylococcus aureus, Enterococcus hirae, Pseudomonas aeruginosa and Escherichia coli (suspension test) and EN 1500 (15 volunteers; four replicates), fungicidal activity according to EN 1275 against Candida albicans and spores of Aspergillus niger (suspension test) and tuberculocidal activity against Mycobacterium terrae using the DGHM suspension test. Virucidal activity was determined in suspension tests based on reduction of infectivity with and without interfering substances (10% fetal calf serum; 0.3% erythrocytes and 0.3% bovine serum albumin). Ninety-six healthcare workers in hospitals in France and the UK used the gel for four weeks and assessed it by filling out a questionnaire. The gel was bactericidal (a reduction factor of > 10(5)-fold), tuberculocidal (reduction factor > 10(5)) and fungicidal (reduction factor > 10(4)) in 30 s. Irrespective of interfering substances the gel inactivated orthopoxvirus and herpes simplex virus type 1 and 2 in 15 s, adenovirus in 2 min, poliovirus in 3 min and papovavirus in 15 min by a factor of > 10(4)-fold. Rotavirus and human immunodeficiency virus were inactivated in 30 s (without interfering substances). Under practical use conditions it was as effective in 30 s as the reference alcohol in 60 s. Most users described the tackiness, aggregation, skin feeling after use and smell as positive or acceptable. A total of 65.6% assessed the new gel to be better than a comparator irrespective of its type (gel or liquid). Overall Sterillium Gel had a unique spectrum of antimicrobial activity. It is probably the first alcohol-based hand gel to pass EN 1500 in 30 s. Due to the excellent acceptance by healthcare workers it may significantly improve compliance for hand hygiene and thereby help to reduce the incidence of nosocomial infection.
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PMID:Spectrum of antimicrobial activity and user acceptability of the hand disinfectant agent Sterillium Gel. 1239 6

Optimal therapy against Legionella infection is based on agents with a high intrinsic activity, an appropriate pharmacokinetic and pharmacodynamic profile (including the ability to penetrate phagocytic cells), a low incidence of adverse reactions and an advantageous cost-efficacy relationship. Newer macroazalides and fluoroquinolones are among the first-line therapies and in severe infections, particularly those occurring in immunocompromised patients, azithromycin and later fluoroquinolones are the agents of choice. Delay in the onset of adequate therapy is a key factor associated with a poor outcome. Thus, all patients with pneumonia associated with respiratory failure, shock or underlying disease causing severe immunodeficiency should initially receive an agent active against Legionella spp., at least while the aetiology remains unknown. Adjunctive measures improve outcome in critically ill patients. In intubated patients with delayed resolution, superinfection by Pseudomonas aeruginosa or co-infection caused by other pathogens should be excluded.
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PMID:Legionnaires' disease: a rational approach to therapy. 1266 78

In order to assess the epidemiological, microbiological, and clinical features of cellulitis and soft tissue infection occurring during the course of HIV disease, clinical and laboratory data of 2221 hospitalizations carried out since 1991 were retrospectively examined, and 67 bacteriologically-proven episodes of cellulitis-soft tissue infection were identified (3.02% of overall admissions). Among the 92 cultured pathogens, Staphylococcus aureus was the most frequent (46 cases), followed by Pseudomonas spp., Escherichia coli, and Streptococcus pyogenes; 38.1% of patients had a polymicrobial infection. i.v. drug use (p<.02) and the male gender (p<.05), were significantly associated with the occurrence of these complications, while a great variation in the severity of underlying immunodeficiency was shown. An elevated rate (83.6%) of episodes of cellulitis or soft tissue infection were community-acquired in origin; the comprehensive frequency of these episodes significantly dropped during the highly active antiretroviral therapy (HAART) era (p<.01). Limbs were involved in over 80% of episodes, and an hematogenous dissemination of bacterial infection (which occurred in 25.4% of cases), proved significantly related to a CD4+ lymphocyte count <100 cells/microL (p<.03), and an absolute neutrophil count <1000 cells/microL (p<.05). S. aureus strains showed an elevated in vitro resistance rate to penicillin, ampicillin, and rifampin, and a 21.7% rate of methicillin-resistance, while among the 29 gram-negative microorganisms, resistance to ampicillin and first-generation cephalosporins, and that to amoxycillin-clavulanate and second-generation cephalosporin, occurred in over 90% and 60% of tested strains, respectively. All episodes of HIV-associated cellulitis and soft tissue infection were favorably treated in 5-16 days, in over 60% of cases with associated beta-lactam and aminoglycoside antibiotics; a recurrence of staphylococcal cellulitis occurred in 4 patients only, 6-17 months after the initial episode. Cellulitis and soft tissue infection are underestimated complications of HIV disease, but they have a broad etiological and clinical spectrum, are predominantly community-acquired, and are responsible for an appreciable morbidity, due to the supporting role of i.v. drug addiction, and the frequent hematogenous dissemination (which proved to be significantly related to the progression of immunodeficiency and underlying disease). The frequent polymicrobial etiology requires a combination antimicrobial therapy (to be guided by in vitro susceptibility studies), which may avoid a complicated and recurrent disease course in the great majority of cases.
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PMID:[Cellulitis and soft tissue infection in patients with HIV disease: epidemiological and microbiological features]. 1269 23

In order to assess the frequency, risk factors, etiology, and clinical outcome of HIV-related sepsis and bacteremia, according to the introduction of highly active antiretroviral therapy (HAART), all episodes occurred in patients hospitalized during years 1993-1995 (pre-HAART era), have been compared with those diagnosed after HAART introduction (years 1997-2000). On the whole, 498 patients suffered from sepsis/bacteremia in the two considered time periods, but the frequency of this complication proved significantly lower during the last 4 years, as opposed to the pre-HAART period (5.3 versus 18.2 episodes per patient-year: p<.0001). Among potential risk factors, during the last 4 years a significant rise of mean CD4+ lymphocyte count was observed (p<.0001), together with a reduced frequency of neutropenia (absolute neutrophil count <1000 cells/ L) (p<.02), and a less frequent association with an advanced HIV disease (stage C, CDC) (p<.03). Despite a remarkably reduced mean duration of admission, during the HAART era a significant increase of nosocomial- versus community-acquired infection occurred (p<.002), with a related greater frequency of gram-negative bacilli of environmental origin: Pseudomonas, Xanthomonas (Stenotrophomonas), Acinetonbacter spp., and non-fermenting bacilli (p<.05). No significant difference was noticed between the two considered periods, as to patients' age, gender, and type of exposure to HIV, use of central vascular lines, prior administration of steroids, antimicrobials, and cotrimoxazole, as well as disease outcome (including the frequency of related deaths). On the whole, the significant drop of frequency of HIV-associated sepsis/bacteremia occurred after the introduction of HAART (over 3.4-fold, compared with that observed prior to HAART use), proved associated with a reduced degree of immunodeficiency, and a less advanced underlying disease. The proportional increase of nosocomial infections and related pathogens did not match with the apparently significant reduction of mean admission time. A careful and continued monitoring of epidemiological, microbiological, clinical, and treatment features of disseminated bacterial disease looks mandatory even during the HAART era, in order to update therapeutic and prophylactic strategies of HIV disease management.
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PMID:[Effects induced by the introduction of highly active antiretroviral therapy (HAART) on disseminated bacterial infection during HIV disease]. 1270 88

Objectives: To study etiological, epidemiological and clinical features of 97 cases of acute meningitis. Methods: Ninety-seven cases of acute meningitis were examined in adult HIV-negative patients admitted to the Infectious Diseases Unit of the Azienda Ospedale-Universita S. Anna in Ferrara. Demographic, etiological, epidemiological and clinical data were analyzed. Results: All cases were divided into two groups according to the macroscopic aspect of cerebrospinal fluid (CSF): purulent CSF (50 cases) or non-purulent CSF (47 cases). Purulent CSF meningitis more frequently affected male patients (64% vs 47%) and older patients (average 52 vs 44 years). The main epidemiological features in both groups were underlying bacterial diseases (i.e. otomastoiditis and/or sinusitis in 50% of pneumococcal meningitis) and iatrogenic immunodeficiency. From a clinical point of view the following alterations in the state of consciousness (stupor, confusion and coma) were most frequently found in purulent meningitis. The following non purulent forms of meningitis were diagnosed: 5 tubercular, 3 viral infections, 2 by Listeria monocytogenes, 1 by Entoameba histolytica, 1 by Cryptococcus neoformans and 35 (74,4%) unknown causes. Purulent meningitis were: 20 (40%) Streptococcus pneumoniae, 10 Neisseria meningitidis, 3 Staphylococcus aureus, 2 Escherichia coli, 1 Haemophilus influenzae and 1 Pseudomonas aeruginosa; 13 cases were unidentified. From 1989 to 1993 and from 1994-98 both groups of meningitis increased; respectively from 17 to 30 cases for non-purulent meningitis and from 18 to 32 cases for purulent meningitis. Meningitis due to Streptococcus pneumoniae increased from 27.7% to 46.8% during the period 1994-98. Conclusions: The study shows the high incidence of pneumococcal meningitis, during 1994-98, because a large number of patients with sinusitis and otomastoiditis were observed. The incidence of meningococcal meningitis appears stable. These data confirm the importance of timely diagnosis and correct therapy for such infections with reserved prognosis.
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PMID:[Current epidemiological and clinical features meningitis in a northern Italian area] 1271 95

Paraneoplastic pemphigus (PNP) is a rare multisystem, autoimmune disease with prominent mucocutaneous manifestations, occurring most commonly in association with haematological malignancies. It is characterised by the presence of circulating autoantibodies against epithelial adhesion proteins. We report a 46-year-old woman with common variable immunodeficiency who developed paraneoplastic pemphigus after receiving radiotherapy for relapsed non-Hodgkin's lymphoma. Flaccid bullae covering approximately 70% of the skin, painful oropharyngeal ulceration and periocular erosions were prominent clinical features. Despite supportive treatment and attempts at disease control using high-dose corticosteroids and cyclophosphamide, the patient became increasingly debilitated, developed septic shock secondary to Pseudomonas aeruginosa septicaemia on two occasions and died of respiratory failure 6 weeks after presentation. We highlight the need to be aware of (PNP) and to perform appropriate immunological investigations. In addition, we emphasise the importance of a multidisciplinary approach to the management of such patients.
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PMID:Paraneoplastic pemphigus occuring after radiotherapy for relapsed non-Hodgkin's lymphoma in a patient with common variable immunodeficiency. 1275 Jul 36

Individuals infected by the human immuno deficiency are more prone to suffering certain bacterial infections in the course of their clinical evolution. The agents involved in these infections are: Streptococcus pneumoniae, Haemophilus influenzae, Pseudomonas aeruginosa, Salmonella spp and Campylobacter spp, which occasion an increase in morbidity and mortality. With a lower frequency, but with an equal morbidity and mortality, infections have been found caused by Rhodococcus equi, Nocardia spp and Bartonella spp. Even though all of them account for a selective impairment of immunodeficiency in one way or another, their incidence varies. Other factors such as degree of immuno suppression, habits, social and geographic living environment could be important. In general, there is a lack of chemoprophylactic strategies for their prevention. Early diagnosis and correct treatment could have important advantages for the quality of life and survival of these patients
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PMID:[Bacterial infections in patients infected by HIV]. 1289 92

The characteristics of cardiac tamponade in patients with human immunodeficiency virus (HIV) disease were examined by evaluating the cases, case series, and related articles, including autopsy series, identified through a comprehensive literature search. One-hundred eighty-five cases of cardiac tamponade have been reported in patients with HIV disease. Sex data were available in 176 patients, of whom 154 (87%) were males. The mean age was 34.7 +/- 10.4 years (range, 11 months to 61 years). Mean CD4 cell count was 98 +/- 95 cells/mm3 (range, 3 to 430 cells/mm3). The most common etiology of pericardial tamponade was mycobacterial infection (78 patients), including Mycobacterium tuberculosis, Mycobacterium avium-intracellulare, and Mycobacterium kansasii. A bacterial cause was found in 20 patients (11%). Staphylococcus aureus was the predominant bacteria, followed by streptococci, Pseudomonas aeruginosa, Listeria monocytogenes, Klebsiella pneumoniae, and Rhodococcus equi. Lymphoma was found in 15 (8%) patients and Kaposi sarcoma in 13 (7%) patients. Numerous unusual organisms, including Cryptococcus neoformans, Nocardia asteroides, Aspergillus species, cytomegalovirus, and herpes simplex were also associated with cardiac tamponade in HIV patients. Occasionally, HIV itself was involved in the pathogenesis. In 48 patients (26%), no cause was found or reported. The most common clinical presentation was dyspnea, followed by fever, cough, chest pain, and cardiac arrest. The predominant pericardial fluid color composition was serosanguineous. The majority of patients died during hospitalization or in the immediate follow-up period. Vigilance for cardiac tamponade in patients with HIV disease, especially in those with opportunistic infections and/or malignancies, and cardiac symptoms, may result in early and proper management of cardiac tamponade in these patients.
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PMID:Cardiac tamponade in patients with human immunodeficiency virus disease. 1293 67


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