Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0032285 (pneumonia)
 54,520 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

In a protocol study of cases of atypical pneumonia over a 1-year period an etiologic agent was established in 16 cases: Legionella pneumophila in 8, Coxiella burnetii in 3, Chlamydia trachomatis in 2, Mycoplasma pneumoniae in 1, para-influenza 3 virus in 1 and cytomegalovirus in 1. In the remaining 11 cases no agent was identified; the illnesses in these cases tended to be less severe. The pneumonia took much longer to resolve in the patients with Legionnaires' disease than in all the other patients (mean interval from onset of symptoms to clearing of the chest roentgenogram: 69 days v. an average of 16 days). However, the length of stay in hospital was similar for the three groups: those with Legionnaires' disease, those with atypical pneumonia of unknown cause and those with atypical pneumonia of various other established causes. L. pneumophila infection may explain a proportion of atypical pneumonias that previously could not be diagnosed, although in this series the cause of 41% of the pneumonias remained unexplained.
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PMID:Causes of atypical pneumonia: results of a 1-year prospective study. 627 75

As early as the 1940s, erythema multiforme exudativum (Stevens-Johnson syndrome) and hemolytic anemia were associated with outbreaks of atypical pneumonia, a disease later found to be caused by Mycoplasma pneumoniae. Epidemiologic evidence has also associated neurological complications, especially aseptic meningitis and meningoencephalitis, with M. pneumoniae infections. Urticarial and morbilliform skin rashes often appear late in the course of M. pneumoniae pneumonia. A multitude of other complications have been ascribed to M. pneumoniae infections, often reported as case reports diagnosed by serologic antibody titers only. More systematic investigations are needed to assess the frequency of complications to M. pneumoniae infections. Isolation of the agent, not only serologic titer rises, should be required before a syndrome is attributed to M. pneumoniae infection.
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PMID:Epidemiologic aspects of M. pneumoniae disease complications: a review. 638 21

Cefotetan (CTT), a new cephamycin antibiotic, was administered to 21 pediatric patients, 1 year and 1 month to 9 years of age, with moderate or severe infections. CTT was intravenously administered 3 times a day at daily doses of 26.5 to 120 mg/kg for 2 to 14 days, and 0.75 to 31.0 g of the drug were totally given. Total of 21 cases, 12 cases of respiratory tract infections (each 1 case of acute pharyngitis, acute tonsillitis and asthmatic bronchitis, 6 cases of acute pneumonia, 1 case of lung fibrosis and 2 cases of primary atypical pneumonia), 2 cases of urinary tract infections, 1 case of acute appendicitis, 1 case of perianal abscess, 2 cases of sepsis, 1 case of MCLS, 1 case of ReYE's syndrome and 1 case of meningoencephalitis, were received CTT. Five cases were excluded for the evaluation of clinical efficacy, and good response were obtained in 11 cases (effective rate of 68.8%), fair in 1 and poor in 4. Out of 3 strains of causative organisms isolated before the treatment, H. influenzae and K. pneumoniae were disappeared after the CTT treatment, S. faecalis which was resistant against CTT persisted. Neither adverse effects nor abnormal laboratory findings were observed except 1 case of eosinophilia.
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PMID:[Clinical evaluation of cefotetan in pediatrics]. 658 32

M. pneumoniae is a common cause of pneumonia. The diagnosis is suspected when the patient presents with symptoms suggesting primary atypical pneumonia including cough, fever, chills, headache, and malaise in association with a segmental or subsegmental pulmonary infiltrate(s), the white blood cell count is normal or only slightly elevated, and the Gram stain of the sputum (if any can be obtained) reveals polymorphonuclear leukocytes and few bacteria. The diagnosis is more difficult when the patient presents with symptoms not suggestive of pneumonia including lethargy, dyspnea, and a 1- to 4-week history of shortness of breath without cough or fever in association with diffuse reticulonodular or interstitial pulmonary infiltrates. The disease in the previously healthy host is usually benign and self-limiting. However, the course is shortened by the administration of tetracycline derivatives or erythromycin. M. pneumoniae pneumonia can occur in association with other diseases including sickle cell anemia, sarcoidosis, systemic lupus erythematosus, Hodgkin's disease, and various other immunodeficiency states. In these patients mycoplasma pneumonia can be very serious. Although there is no pathognomonic clinical or radiographic presentation, careful consideration of epidemiologic, clinical, laboratory, and radiographic data are usually sufficient to suggest the diagnosis in most patients.
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PMID:Mycoplasma pneumonia. 676 79

The roles of Mycoplasma pneumoniae, M. hominis and Ureaplasma urealyticum in diseases of humans are currently under investigation. M. pneumoniae, which causes primary atypical pneumonia, is a well established pathogen of the respiratory tract. Complications of infection by this organism are also being recognized; they include disorders of the hematopoietic, cardiovascular, central nervous, musculoskeletal, cutaneous and gastrointestinal systems. The roles of the genital mycoplasmas M. hominis and U. urealyticum are controversial but may include infections of the genitourinary tract and in pregnancy as well as diseases of the newborn, such as neonatal pneumonia and meningitis. In this review atypical pneumonia due to M. pneumoniae is described and the role of mycoplasmas in other diseases is discussed.
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PMID:Mycoplasmas in diseases of humans. 679 Jan 48

Out of 2,105 patients with atypical pneumonia and febrile infections 15 cases of legionellosis were diagnosed by the indirect immunofluorescent antibody test (IFA) in Austria from the middle of 1977 to the end of 1979. Among the patients with the diagnosis of atypical pneumonia Legionnaires' disease was found in 0.65%. Among those patients whose sera were examined because of suspected legionella infection the frequency was 1.96% (p less than 0.1). Therefore it may assumed that some symptoms of legionella infections may lead to the clinical diagnosis of the disease. Neither the geographical distribution of the cases nor environmental examinations nor the prevalence of antibodies gave any indication of an epidemic or hyperendemic occurrence of Legionnaires' disease in Austria. Low antibody titres to serogroup 1 of Legionella pneumophila (1:32-1:64) were found in 6.4%, higher titres (greater than or equal to 1:128) in 1.2% of all patients examined. Crossreactions of sera mainly occurred between antigens of serogroup 1 and serogroup 2. Antibodies to serogroups 3 and 4 were found seldom. According to our results crossreactivity between L. pneumophila on the one side and Mycoplasma pneumoniae or Chlamydia psittaci on the other side is of no importance and does not interfere with serological diagnosis. In serological routine examinations frequency of recent infections with L. pneumophila in patients with pneumonia was about as high as with Chlamydia psittaci or Picornavirus. To our opinion the expenditure for serological diagnosis is justified in all patients with severe pneumonia of unclear etiology as there exists the possibility of a purposive chemotherapy in legionellosis as it does in mycoplasma pneumonia or ornithosis. Moreover for quick diagnosis it should always be attempted to demonstrate the causative agent by direct immunofluorescence or by isolation.
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PMID:[Epidemiology and diagnosis of Legionella infections in Austria (author's transl)]. 679 7

Mycoplasma pneumoniae represents one of the most common etiologic agents of lower respiratory tract disease of man. Data from a 12-yr period of surveillance in Seattle, WA, USA, revealed that infection rates varied from 2% in endemic years to 35% in epidemic periods (J Infect Dis 139: 681, 1979). Most persons with M. pneumoniae infections have a relatively mild disease, which is not usually accompanied by frequent complications. Atypical pneumonia caused by the organisms is most prevalent in school-age children, with peak occurrence at about 10 years old. In this group, 13 to 18% of those infected develop pneumonia. Clinical disease is uncommon below 4 and above 50 years of age. M. pneumoniae infections probably occur throughout the world. It has been estimated that approximately 50% of the infections in adults but only 20% in children are completely asymptomatic. The usual clinical picture of atypical pneumonia and the wide range of unusual manifestations of M. pneumoniae disease are presented. Except for a few single case reports, histopathology of M. pneumoniae disease has been extensively studied after experimental infection of hamsters and guinea pigs. These animal models had to be developed because of the benign course of most M. Pneumoniae diseases in man. Due to this limited information on the pathology of natural disease, comments on its pathogenesis are also based on findings using experimental models. Infection is established by attachment of the organisms to the surface membrane of ciliated epithelial cells. Antigenic similarities between the glycolipids of M. pneumoniae membranes and host tissue, unspecific blastogenesis and immunosuppression during infection have been described. These phenomena may explain a decreased protective immune mechanism of the host during infection. Several as yet unexplained features of M. pneumoniae disease support the hypothesis that lung infiltrates in M. pneumoniae infection may be, in part, immunologically determined in a host sensitized by one or more silent infections.
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PMID:Mycoplasma pneumoniae infections. 679 35

Clinical trials of 9,3"-diacetylmidecamycin (MOM), a new macrolide antibiotic were carried out on 46 pediatric patients of 1 month to 11 years old with infections (acute pharyngitis 12, acute tonsillitis 1, acute bronchitis 14, asthmatic bronchitis 10, acute pneumonia 1, primary atypical pneumonia 2, Mycoplasma pneumonia 4 and pertussis 2). As a rule, MOM was given orally at a daily dose of 20 approximately 40 mg/kg divided into 3 times. The clinical results were excellent in 5 patients, good in 21, fair in 7 and poor in 13 and the efficacy rate was 56.5%. Side effects were observed in 4 patients (diarrhea, exanthema, urticaria and eosinophilia, 1 patient respectively). MOM is easy to take and a useful antibiotic for treating patients with bacterial infections, in particular, respiratory tract infection caused by Mycoplasma pneumoniae.
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PMID:[Clinical studies of 9,3"-diacetylmidecamycin in pediatric field (author's transl)]. 697 41

9, 3"-Diacetylmidecamycin (MOM), a new macrolide antibiotic, was administered to 28 patients: 6 with pharyngitis caused by Group A beta-Streptococcus, 2 with lacunar tonsillitis, 8 with upper respiratory tract infection, 6 with acute bronchitis, 3 with Mycoplasma pneumonia, 1 with primary atypical pneumonia, 1 with pneumonia caused by H. influenzae and 1 with whooping cough. MOM in the form of fine granules was administered at a daily dose of about 20-30 mg/kg divided into 3 doses. Isolated group A beta-Streptococcus strains were eradicated in only 1 out of 6 strain S. One strain of H. influenzae was eradicated. The clinical results could be obtained with 21 cases and the response was excellent in 1 case, good in 7, fair in 3 and poor in 10. Although diarrhea was found in 3 cases during the administration of MOM, it was not clear whether these phenomena were caused by MOM, because of the prevalence of diarrhea among the children treated by us at that time.
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PMID:[Clinical results of 9, 3"-diacetylmidecamycin dry syrup in the pediatric field (author's transl)]. 698 Feb 94

Only nine cases of Q fever were recorded in Canada in the 20 years prior to 1978. In the 18 months from August 1979 to January 1981 the disease was diagnosed serologically in six patients from the Maritime provinces. All were epidemiologically unrelated and none had been exposed to animals. Five had pneumonia and one had chronic Q fever with probable prosthetic valve endocarditis. Three of the five pneumonia patients presented with signs and symptoms of an acute lower respiratory tract infection and were indistinguishable clinically from other patients with atypical pneumonias. The other two with pneumonia presented with nonresolving pulmonary infiltrates and complained of decreased energy. Four of the five pneumonia patients responded well to treatment with erythromycin; the fifth required two courses of tetracycline. The patient with chronic Q fever had a large amount of cryoglobulins in his serum and evidence of immune complex disease. These cases indicate that Q fever should be considered as a possible cause of atypical pneumonia in Canada.
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PMID:Q fever in maritime Canada. 707 57


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