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Query: UMLS:C0032285 (pneumonia)
 54,520 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The results of the study on the functional activity of natural killers (NK) and serum interferon in 118 children ranging in age from 3 months to 5 years suffering from influenza and other acute respiratory viral diseases complicated with croup, pneumonia, and obstructive syndrome (66 children with influenza, 21 with parainfluenza, 16 with adenovirus infection, and 15 with respiratory syncytial virus diseases) are presented. The control group consisted of 22 normal children. Decreased NK activity was demonstrated in the acute period of all ARVD but was more marked in adenovirus disease and complications with pneumonia, bronchiolitis, obstructive syndrome. While in hospital, children with low interferon titres developed a new acute viral disease more frequently or their principal disease was complicated with pneumonia. The detection of NK cell inhibition in some patients with ARVD complicated with pneumonia, bronchiolitis and decreased serum interferon levels in these patients are considered as indications for administration of immunotherapy (levamisole, zixorin, cathergen).
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PMID:[Natural killers and interferon in complicated influenza and other acute respiratory viral diseases in children]. 242 69

The effects of the pulmonary toxicant, 4-ipomeanol (4-IP), on Sendai viral pneumonia was examined in young adult female C57BL/6J mice. The histologic severity of the pneumonia was closely correlated with increasing doses of the compound. The more severe pneumonia observed in the 4-IP-treated animals was associated with higher pulmonary viral titers and a more diffuse distribution of viral antigen in bronchioles and alveolar parenchyma. There was no difference in the systemic humoral immune response against Sendai virus or pulmonary interferon production in animals that had received 4-IP or vehicle pretreatment. Classification of the antigen-positive cell types in the alveolar parenchyma resulted in a marked relative increase in the numbers of antigen-positive macrophages, as compared with other antigen-positive cell types.
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PMID:4-Ipomeanol-induced effects on Sendai viral pneumonia in mice. 243 57

Data are reported of the results of clinical trials of the therapeutic efficacy of longaceph--a drug of the new generation of cephalosporins with a long period of half-decay--in acute pneumonia complicating influenza in 42 patients. The sensitivity of 120 microbial strains to longaceph was also studied. It was established that cephalosporin possesses a high efficacy in diseases caused by gram-positive and gram-negative microorganisms. A high degree of sensitivity to longaceph was observed in pneumococci biogenous and Streptococcus viridans, Staphylococcus aureus and epidermidis, klebsiellae and escherichiae. A new property of longaceph was found, namely, its capacity to stimulate the formation of endogenous interferon.
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PMID:[A clinical and experimental study of longatsef]. 248 83

The temporal relation between a lung infection with bovine herpesvirus-1, suppression of some immune functions, and susceptibility to secondary bacterial infection resulting in fibrinous pneumonia prompted a study to determine the mechanism(s) involved in the apparent immunosuppression. In six independent experiments employing from five to 40 calves, we studied the immunologic parameters of migration of and superoxide anion production by polymorphonuclear neutrophils, lectin-induced lymphocyte proliferation, interleukin-2 production, natural cytotoxicity, interferon and antibody formation, as well as complement activation and hematologic parameters. Chemotaxis of polymorphonuclear neutrophils, natural cytotoxicity, and mitogen response of peripheral blood leukocytes were depressed, whereas superoxide anion generation by polymorphonuclear neutrophils was transiently increased and interleukin-2 production was only marginally affected. The assumption that virus-induced interferon might be a common cause for the various changes could not be substantiated. However, the results did suggest that mechanisms other than lack of T helper cell activity, accessory cell activity of macrophages, or development of suppressor T cells were the cause of suppressed mitogen responses. None of the immunologic parameters appeared to have consistent prognostic value with respect to outcome of the infection.
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PMID:Viral-bacterial pneumonia in calves: effect of bovine herpesvirus-1 on immunologic functions. 258 Sep 16

A mouse model of pneumonia caused by murine Chlamydia trachomatis (mouse pneumonitis agent) was used to demonstrate that whole spleen cells from both nude athymic mice (nu/nu) and heterozygous mice (nu/+) produced tumor necrosis factor alpha in vitro in response to mouse pneumonitis agent antigen. The tumor necrosis factor alpha measured in these supernatants by immunoassay was shown to have bioactivity in a cytotoxic assay in which uninfected target cells were used. This cytotoxicity was distinct from the gamma interferon-related cytotoxicity against C. trachomatis-infected targets that we described previously.
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PMID:Tumor necrosis factor alpha is a cytotoxin induced by murine Chlamydia trachomatis infection. 270 49

Fifty-seven children ages 1 month to 12 years hospitalized because of community-acquired pneumonia were compared with age-matched controls who had acute asthma without pneumonia to test the value of rapid bacterial antigen detection and clinical and radiographic criteria for diagnosis of bacterial pneumonia. Bacterial pneumonia, defined on the basis of positive cultures of blood or pleural fluid, was diagnosed in 4 children (7%), 1 of whom also had viral pneumonia. Viral pneumonia, defined as a positive nasopharyngeal sample or positive serology, was diagnosed in 20 children (35%). Serum and concentrated urine were tested by latex agglutination (Wellcogen) for Haemophilus influenzae type b and pneumococcal antigens and by countercurrent immunoelectrophoresis for pneumococcal antigens. Pneumococcal antigen could not be detected in serum or urine from 3 children with culture-proved pneumococcal pneumonia, indicating poor sensitivity of the tests. In contrast apparent H. influenzae type b antigenuria was detected by latex agglutination in 4 of 40 children with pneumonia but also in 5 of 57 controls, and a sensitive enzyme-linked immunosorbent assay for polyribosyl ribitol (PRP) phosphate antigen showed that all 9 cases were false positives. The specificity of H. influenzae type b antigen detection was thus poor. Children with viral and bacterial pneumonia could not be distinguished by radiographic or clinical criteria (symptoms, fever) or by total or differential white blood cell counts, serum C-reactive protein or nasal or serum interferon levels. It is not possible to distinguish reliably childhood viral from bacterial pneumonia clinically or by rapid diagnostic tests.
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PMID:Problems in determining the etiology of community-acquired childhood pneumonia. 278 61

In 30 patients with pneumonitis, 16 of whom had undergone bone marrow transplantation, 13 episodes of cytomegalovirus (CMV) pneumonitis were diagnosed. In three of these, alpha-interferon, which in two cases was partially acid-labile, was detected in bronchoalveolar lavage fluid. All three of these patients died. Only two deaths occurred in ten patients without detectable levels of alpha interferon in the lavage fluid. CMV pneumonitis in immunocompromised patients appears to stimulate the local production of a partially acid-labile alpha-interferon, and its presence is associated with a poor prognosis. Gamma-interferon was not found in the lavage fluid of any patient with pneumonitis.
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PMID:Presence of a partially acid-labile alpha-interferon in bronchoalveolar lavage fluid of patients with cytomegalovirus pneumonitis is associated with a poor prognosis. 282 34

An unusual case of Q fever in a 62-year-old female is described. The patient presented with severe pneumonia and developed renal failure, disseminated intravascular coagulation and pancytopenia which recurred after antibiotics were discontinued. Subsequently hairy cell leukemia was diagnosed and evolved favorably under treatment with doxycycline and alpha-interferon. A review of the literature confirms that renal failure and disseminated intravascular coagulation do not appear to be associated with Coxiella burnetti infections, nor has the association of Q fever and hairy cell leukemia been previously described.
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PMID:[Unusual manifestations of Q fever disclosing hairy cell leukemia]. 292 42

After reviewing the immunological anomalies provoked by the human immuno-deficiency virus (HIV) as well as their implications in pulmonary pathology, the authors enumerate the diagnostic and therapeutic methods currently available in the treatment of patients suffering from AIDS and pulmonary diseases. The clinical features as well as the chest radiograph--an essential first line tool--may lead to atypical features. Respiratory function tests and scintigraphy to Gallium may be a useful additional diagnostic technique but for a full pulmonary investigation a bronchoalveolar lavage is required and/or transbronchial biopsy. Open lung biopsy is rarely required, and then only as a last resort. The treatment of pneumocystis remains centred on Trimethoprim sulfamethoxazole and Pentamidine, with a similar efficacy (80% care) but both have side-effects which are less frequent but more severe with Pentamidine. Administration of Pentamidine by aerosol, Eflornithine and Trimetrexate are under study. The level of lactic dehydrogenase (LDH) seems to be a prognostic factor. The value of prophylaxis is discussed. If the treatment of tuberculosis, an infection which is seen more and more frequently, still rests on classical triple therapy, the treatment of atypical mycobacterial infections is even more deceptive than in non-immuno-suppressed hosts. The same is true with pneumonia due to cytomegalovirus. The treatment of lymphoid interstitial pneumonia which is probably a direct result of HIV infection, remains controversial. On the other hand, pulmonary Kaposi's sarcoma is associated with an elevated mortality, and all treatment (interferon and chemotherapy) is disappointing.
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PMID:[Pulmonary manifestations of acquired immunodeficiency syndrome]. 306 2

We studied the lymphocytes and serum suppressive factor in patients with Mycoplasma pneumoniae pneumonia. Skin testing for delayed hypersensitivity to tuberculin was performed in 44 patients with pneumonia associated with M. pneumoniae infection. These patients were tuberculin-positive. Twenty-five patients showed a transient negative tuberculin reaction in the acute stage and 19 had a positive reaction. In tuberculin-negative patients, peripheral blood T lymphocytes were not significantly reduced; however, the blastogenic lymphocyte response to purified protein derivative (PPD) and PPD-induced gamma-interferon production were significantly reduced when compared with those in tuberculin-positive patients and healthy tuberculin-positive controls. The lymphocyte response of healthy tuberculin-positive controls was not suppressed by adding the serum of the tuberculin-negative patients. These results suggest that tuberculin anergy in patients with M. pneumoniae pneumonia early after clinical onset is due to depressed lymphocyte functions and not to serum factors.
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PMID:Depressed cellular immunity in Mycoplasma pneumoniae pneumonia. 311 74


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