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

The ability of Mycoplasma pneumoniae cells and membranes to affect tetrazolium reduction by hamster trachea organ cultures was evaluated. Uninfected trachea explants reduced 2,3,5-triphenyl tetrazolium chloride (TTC) and nitro-blue tetrazolium when incubated at 37 C in the absence of air. Reduced tetrazolium salts (formazans) were extractable with acetone or ethylene glycol and could be quantitated spectrophotometrically. The optimal assay system involved the use of three or more tracheal rings incubated for 2 h in 0.12% TTC in Tyrode balanced salts supplemented with 1.2% sodium succinate. Formazan was extracted for 5 min with acetone, and the optical density (490 nm) was determined. Trachea explants with metabolic activity reduced or obliterated by freeze-thaw lysis, heat (56 C X 30 min), or cyanide (0.1 M NaCN X 30 min) had negligible ciliary activity and tetrazolium reduction activity (optical density at 490 nm [dry weight]). Tracheas exposed to mycoplasma cells or membranes also showed significantly decreased ciliary activity and tetrazolium reduction; e.g., only 5pc of the ciliary activity and reduction capacity remained after 5 days in culture when infected with M. pneumonia PI 1428 cells. The data indicate that the exposure of ciliated respiratory epithelium to mycoplasma cells or membranes results in diminished oxidative metabolism, and that the ability to reduce TTC to its formazan is correlated with relative ciliary activity.
 ...
PMID:Quantitative reduction of 2,3,4-triphenyl tetrazolium chloride by hamster trachea organ cultures: effects of Mycoplasma pneumoniae cells and membranes. 124 78

We studied serum sodium, plasma osmolality and urinary sodium and osmolality on days 1, 3 and 5 of hospitalization of 100 children aged from 1 month to 12 years admitted with a diagnosis of pneumonia. Hyponatraemia (serum sodium concentration < or = 130 mmol/l) was found in 31 patients at the time of admission. The probable cause of hyponatraemia in 94% of cases was the syndrome of inappropriate antidiuretic hormone secretion (SIADH). Symptoms and signs indicative of severe pneumonia were two to three times more frequent and the mean duration of tachypnoea, chest-wall retraction and hospital stay about one and a half times longer in children with hyponatraemia. Four children died (two on day 1, one on day 5 and one on day 8); all four had a serum sodium concentration < or = 125 mmol/l which persisted until death. Of the remaining 27 hyponatraemic children, serum sodium concentrations returned to normal on day 3 in 26, while in one hyponatraemia persisted until day 7. The recovery from hyponatraemia showed a good correlation with improvement in clinical signs of respiratory distress. The SIADH occurred in about one-third of the children hospitalized for pneumonia, and was associated with a more severe disease and a poorer outcome. Perhaps fluid restriction in these cases may improve the outcome.
 ...
PMID:Hyponatraemia and the inappropriate ADH syndrome in pneumonia. 128 78

A 65-year-old woman with rheumatoid arthritis was treated with gold (gold sodium thiomalate), bucillamine, and other drugs. Gold was discontinued because of rash. Consequently she presented with high fever and alopecia, and was admitted with dyspnea. Chest X-ray showed diffuse bilateral reticulolinear infiltrates. The percentage of lymphocytes was increased and OKT4/8 ratio was decreased to 0.22 in bronchoalveolar lavage fluid (BALF). In lung tissue specimens obtained by TBLB, alveolitis with Masson's bodies was seen on light microscopy, and electron micrography showed interstitial edema with desquamated macrophages in the alveolar space and lipid-laden pericytes, secondary to extensive destruction of the alveolar-capillary barrier. After discontinuation of drugs, her symptoms and infiltrates on the chest X-ray resolved. Furthermore, the results of drug lymphocyte stimulation test (DLST) were positive for both drugs. We diagnosed this case as bucillamine-induced pneumonitis, since the symptoms developed after the administration of bucillamine; however, an interaction between bucillamine and gold may have contributed to the occurrence.
 ...
PMID:[A case of bucillamine-induced pneumonitis]. 140 91

To determine the frequency of electrolyte disturbance in pneumonia, we studied 264 hospitalized children with pneumonia for serum sodium and potassium concentration, and plasma osmolality (Posm) on the day of admission. Urine osmalality (Uosm) and urine spot sodium concentration were measured in those who had a serum sodium less than or equal to 130 mEq/L. Hyponatremia was found in 27%, hypernatremia in 3.7%. Hypokalemia (serum potassium less than or equal to 3.5 mEq/L) in 19 and 2% had hyperkalemia (serum potassium greater than or equal to 6.5 mEq/L). Of all the hyponatremia, 68% were secondary to syndrome of inappropriate ADH secretion (SIADH) as suggested by a concomitant lowering of Posm less than or equal to 280 mosm/kg and increased urinary osmolality and sodium excretion. Hyponatremia was associated with 60% longer hospital stay, two fold increase in complications and the 3.5 times higher mortality compared to that of normonatremia. The above variables were affected further, if hypokalemia coexisted with hyponatremia.
 ...
PMID:Frequency and significance of electrolyte abnormalities in pneumonia. 150 Jan 33

Hyponatraemia has been described in association with a number of acute infectious diseases, mainly bacterial and tuberculous meningitis and pneumonia, and has been attributed to inappropriate secretion of arginine vasopressin (AVP). The mechanism of inappropriate AVP production is uncertain, but there is experimental evidence to suggest that fever may stimulate secretion of AVP into plasma and cerebrospinal fluid. In this study, AVP concentrations in plasma and cerebrospinal fluid from 37 febrile children with infections have been compared with those from 27 afebrile control subjects. Ten of the febrile children had meningitis (eight bacterial, two viral) and the remainder a variety of other infectious diseases. Seventy four per cent of febrile infected children were hyponatraemic (serum sodium less than 135 mmol/l) compared with only 8% of the afebrile controls. Plasma AVP concentrations were significantly higher in the febrile patients (median 2.92 pmol/l, range 1.0-23.25, n = 28) than in controls (median 1.67 pmol/l, range 0.57-6.0, n = 14) but there was no significant difference in cerebrospinal fluid AVP concentrations. There was no difference in plasma AVP concentrations between patients with meningitis and those with infections not involving the central nervous system. Careful attention should be paid to fluid and electrolyte balance in all children with acute infections.
 ...
PMID:Plasma and cerebrospinal fluid arginine vasopressin in patients with and without fever. 152 19

Gold lung, a gold-induced pneumonitis, is considered to be caused by hypersensitivity reaction to gold. We performed lymphocyte stimulation test (LST) to determine the response to gold, using lymphocytes obtained by bronchoalveolar lavage (BAL) from a patient with gold lung. A 57-year-old man was admitted with progressive shortness of breath following a skin eruption. He had been receiving weekly sodium gold thiomalate (Shiosol) for rheumatoid arthritis, with a cumulative dose of 485 mg. Chest roentgenogram showed diffuse interstitial infiltrates. LST for the response to gold, using peripheral lymphocytes, was positive. T cell lymphocytosis was observed in BAL, and transbronchial lung biopsy showed lymphocytic alveolitis and granulation tissue in alveolar ducts. From these findings, we diagnosed gold lung. Prednisolone (PSL) was started with an initial dose of 30 mg/day and resulted in a rapid improvement. As the dose of PSL was tapered, the patient's condition deteriorated and he was treated with a maintenance dose of 10 mg PSL. The second BAL revealed persistent lymphocytosis, and LST using bronchoalveolar lymphocytes for response to gold was positive. LST using peripheral lymphocytes was also positive, but was weaker than that using bronchoalveolar lymphocytes. This is the first report in Japan of a positive LST for response to gold, using bronchoalveolar lymphocytes from a patient with gold lung. This case suggests that the presence of activated lymphocytes against gold in the lung is cumulative, and that cell-mediated hypersensitivity is related to gold lung.
 ...
PMID:[A case of gold lung with positive lymphocyte stimulation test to gold, using bronchoalveolar lymphocytes]. 156 28

Imipenem/cilastatin sodium (IPM/CS) was used to treat respiratory tract infections (RTI) in 54 patients with lung cancer. Out of the 54 patients studied, 53 were evaluable for the utility of IPM/CS; 42 had pneumonia, 9 had obstructive pneumonia, 1 had a lung abscess and 1 had acute bronchitis. The efficacy rate was 71.7%. Seventeen causative organisms were isolated from 14 patients. They included Staphylococcus aureus 5 strains, Staphylococcus epidermidis 4 strains, Staphylococcus sp. 2 strains, Enterococcus faecalis 1 strain, Pseudomonas aeruginosa 2 strains, Pseudomonas fluorescens 2 strains, Acinetobacter sp. 1 strain, and the eradication rate was 81.8%. Clinical adverse effects (nausea and vomiting) were observed in 1 patient. Abnormalities in laboratory test results were observed in 3 patients. They disappeared or returned to normal values after completion of therapy or discontinuation of IPM/CS administration. IPM/CS appears to be a useful antibiotic for RTI in patients with lung cancer.
 ...
PMID:[Therapeutic efficacy of imipenem/cilastatin sodium on respiratory tract infections in lung cancer patients]. 165 53

We present a case of malignant neuroleptic syndrome in a 55 years old male diagnosed 3 years ago of alcoholic paranoid psychosis who was chronically treated with haloperidol, clothiapine, and phenobarbital. Twenty one days after neuroleptic drug withdrawal the patient was admitted to the recovery room because of hyperthermia (40.2 degrees C), left basal pneumonia, acute respiratory insufficiency, extrapyramidal rigidity, mutism, dysarthria, deep coma, hypotension, and tachycardia. Two days after he presented massive rhabdomyolysis, atrial flutter with hemodynamic deterioration which reverted to sinus rhythm and acute anterolateral and inferior myocardial infarction documented by enzyme rise and electrocardiographic alterations. Rhabdomyolysis and myocardial infarction were the precipitating factors of the renal insufficiency. A malignant neuroleptic syndrome was suspected and intravenous treatment with dantrolene sodium 1.5 mg/kg every 24 hours was initiated. Bromocriptine was not administered. The patient died 14 days after in the course of a sepsis and cardiogenic shock.
 ...
PMID:[Malignant neuroleptic syndrome associated with myocardial infarction, acute renal insufficiency and rhabdomyolysis]. 168 57

Group G streptococci which have been isolated from the oral flora of rats are also normal inhabitants of the human skin, oropharynx, gastrointestinal tract, and female genital tract. This group of streptococci can cause a wide variety of clinical diseases in humans, including septicemia, pharyngitis, endocarditis, pneumonia, and meningitis. Ten days after oral gavage with 7,12-dimethylbenz[a]anthracene, 12 of 22 two-month-old, female, outbred, viral-antibody-free rats presented with red ocular and nasal discharges and marked swelling of the cervical region. Various degrees of firm, nonpitting edema in the region of the cervical lymph nodes and salivary glands as well as pale mucous membranes and dehydration were observed. Pure cultures of beta-hemolytic streptococci were obtained from the cervical lymph nodes of three rats that were necropsied. A rapid latex test system identified the isolates to have group G-specific antigen. These streptococcal isolates fermented trehalose and lactose but not sorbitol and inulin and did not hydrolize sodium hippurate or bile esculin. A Voges-Proskauer test was negative for all six isolates. Serologic tests to detect the presence of immunoglobulin G antibody to rat viral pathogens and Mycoplasma pulmonis were negative. Histopathologic changes included acute necrotizing inflammation of the cervical lymph nodes with multiple large colonies of coccoid bacteria at the perimeter of the necrotiz zone. To our knowledge, this is the first report of naturally occurring disease attributed to group G streptococci in rats.
 ...
PMID:Group G streptococcal lymphadenitis in rats. 175 39

Infections with parasitic protozoa have always been problems for the developing world and are becoming of greater importance to the developed world in this age of easy international travel. The major human protozoal diseases are summarised with an emphasis on their presentation in normal hosts and in immunocompromised individuals and current US drug treatment recommendations are discussed. Present antiprotozoal regimens are based either on a pharmacokinetic rationale or on clinical trial and error. Regimens based on trial and error include amphotericin B against leishmaniasis and arsenic against African trypanosomiasis. Regimens which are to some extent driven by pharmacokinetic or biochemical considerations include paromomycin and metronidazole against amoebiasis, sodium stibogluconate against leishmaniasis, halofantrine and mefloquine against malaria, dihydrofolate reductase (DHFR) inhibitors against Pneumocystis carinii and toxoplasmosis and aerosolised pentamidine against P. carinii pneumonia. The majority of pharmacokinetic studies have been performed only on agents which have some therapeutic activity against other diseases of the developed world. Despite the trend toward rational treatment regimens, no studies have been performed that permit optimisation of antiprotozoal treatment regimens on the basis of clinical conditions such as renal failure.
 ...
PMID:Pharmacokinetic justification of antiprotozoal therapy. A US perspective. 178 41


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>