Biomedical subjects

S Mochinaga

Publications and source records attributed to S Mochinaga.

At least 19 recordsLinked to original sources

PubMed1999

[Recurrent respiratory tract infection caused by Moraxella catarrhalis in patients with pneumoconiosis].

Moraxella catarrhalis is recognised as a major pathogen in chronic respiratory diseases. Patients with pneumoconiosis have repeated respiratory infections, and the control is very important for good prognosis. From 1988 to 1993, fifty strains of Moraxella catarrhalis were obtained from 9 patients with pneumoconiosis attended at Nagasaki Rosai Hospital. Restriction enzyme analysis of chromosomal DNA by Hind III. Hae III, Cla I was performed on 50 strains of M. catarrhalis. Twelve strains (56%) out of 23 isolates with interval of less than 5 months had identical bacterial restriction endonuclease digestion patterns with three different enzymes, and all isolates with interval more than 6 months had different patterns. Tweny out of 13 episodes by the same strains occurred during 3 months. The acquisition and clearance of M. catarrhalis from the respiratory tract is a dynamic process.

Aged↗

PubMed1994

[Clinical significance of positive blood cultures in the Nagasaki Rosai Hospital during the past 6 years].

In this clinical study we tried to find out the clinical significance of positive blood cultures between Jan. 1984 and Dec. 1989 in the Nagasaki Rosai Hospital. In this period the association between the isolated bacteria from blood cultures (398 specimens: 17.9%) and clinical background were evaluated. Each year the positive cultures were seen in about 18-20%. The distribution of bacteria showed increase percentage of the gram-positive organisms such as coagulase-negative Staphylococcus. Gram-negative organisms in included P. aeruginosa, A. calcoaceticus and E. coli. A. calcoaceticus was frequently found from the dept. of neurosurgery. Fungus, mostly Candida, was isolated in about 10-20%. The specimens were provided from department of internal medicine (62.9%) and neurosurgery (22.8%). An analysis of 213 episodes of 188 bacteremic cases was made. The onset of bacteremia had two peaks, 24 h or 1 month, after admission. The primary infected sites were the urinary tract (26.7%), respiratory system (14.5%) and central nervous system (6.1%). The central venous catheter was an important infected site. The major underlying diseases included acute cerebrovascular diseases, cardiac failure due to valvular heart diseases or acute myocardial infarction and/or iatrogenic immunocompromised state. The major complications were disseminated intravascular coagulation (DIC) (24.4%) and multiple organ failure (MOF) (8.9%). Half of the DIC episodes was caused by gram-positive cocci such as CNS, E. faecalis and MRSA. 68.4% of MOF episodes was associated with gram-negative bacteria. While the remainder was caused by gram-positive cocci including CNS and MRSA.(ABSTRACT TRUNCATED AT 250 WORDS)

Aged↗

PubMed1992

[Isolation of MRSA from inpatients, staff and environment in the hospital].

The state of MRSA contamination of inpatients, hospital staff, and the hospital environment was evaluated. Nasal, pharyngeal, and digital samples from 182 patients admitted in September and October, 1990, and 288 hospital staff members and sputum, urine, and feces of the inpatients were cultured. Environmental contamination was examined in samples collected from the air by air sampling and from the floor by the wiping method. The MIC and the coagulase type of the MRSA obtained were determined, and their relationships were evaluated. MRSA was detected in 9.5% of nasal samples, 7% of pharyngeal samples, 10% of sputum samples, 0% of urine samples, and 2.6% of fecal samples from the 182 inpatients. It was detected in 4% of nasal samples, 0.7% of pharyngeal samples, and 1% of digital samples from the 288 hospital staff members. From the environment, MRSA was detected from hospital rooms of the surgery and neurosurgery wards, the nursing room and corridors of the obstetrics and gynecology ward, and the recovery room of the urology ward. The coagulase type of the MRSA obtained was the primarily type II regardless or whether the samples were obtained from the subjects or the environment. Concerning the drug sensitivity, many MRSA strains were highly resistant to DMPPC and FOM, but the sensitivity to RFP was 0.1 microgram/ml or less in all strains except for one highly resistant strain (200 micrograms/ml or above).(ABSTRACT TRUNCATED AT 250 WORDS)

Air Microbiology↗

PubMed1991

[Hafnia alvei septicemia with shock and DIC in an adult with postoperative lung cancer].

In Japan, we experienced the first case of Hafnia alvei septicemia with shock and disseminated intravascular coagulation (DIC) in an adult with postoperative lung cancer. A 63 year-old male, who had been followed up in our department since 1987, was admitted to our hospital with the complaints of fever, hemoptysis and dyspnea on June 25, 1989. After admission, he was treated with sulbactam/cefoperazone 4 g/day intravenously for suspicion of respiratory-tract infection. After antibiotic administration, the fever subsided and the general condition became almost good. The patient experienced fever again after the antibiotic was stopped. For this reason subsequent Clavulanic acid/Amoxicillin, Flomoxef, and Ceftazidime was administered, but was not effective. Therefore septicemia was suspected and blood culture was done. The bacteria isolated from blood culture was identified as Hafnia alvei. Hafnia alvei is a gram-negative organism belonging to the Enterobacteriaceae family and quite rare pathogen in human.

Bacteremia↗

PubMed1989

[Respiratory tract infections caused by Branhamella catarrhalis in outpatients with pneumoconiosis].

To investigate the occurrence of Branhamella catarrhalis respiratory tract infections in 109 outpatients with pneumoconiosis, clinical and bacteriological studies were performed during a 4-year period from April 1984 to March 1988. B. catarrhalis was isolated in 26 patients; only three of these received continuous corticosteroid treatment. The incidence of B. catarrhalis respiratory tract infections increased gradually during the years 1984-1986, but decreased for the first time in 1987 compared with the previous year. There was a seasonal variation in isolations with a peak incidence during the winter, a pattern in contrast to Haemophilus influenzae. Almost all isolates produced beta-lactamase. B. catarrhalis found in mixed culture was usually in association with H. influenzae or Streptococcus pneumoniae. The isolation rates for B. catarrhalis in sputum of patients with pneumoconiosis followed those of H. influenzae and S. pneumoniae, and almost all strains were positive for beta-lactamase, so B. catarrhalis should be admitted that it is a primary pathogen.

Adult↗

PubMed1989