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Biomedical subjects

Y Kazuyama

Publications and source records attributed to Y Kazuyama.

29 records · Page 2Linked to original sources
PubMed1991

[Recovery of Chlamydia pneumoniae and Chlamydia trachomatis in a patient with recurrent tonsillitis, bronchitis and otitis media with effusion].

We report a case of recurrent tonsillitis and otitis media with effusion (OME) from which Chlamydia trachomatis was isolated. Chlamydia pneumoniae, a newly recognized species of Chlamydia, was also recovered from the tonsillar and bronchial swabs. A 8-year-old girl was seen on February 23, 1988, because of a running nose, a productive cough and bilateral hearing difficulty. She had a history of recurrent tonsillitis. The diagnosis was acute sinusitis with tubal obstruction, then cefixime was prescribed. Her symptoms were once resolved, for the time being but she came back to the hospital a week later with a bilateral ear-ache. The tympanic membranes were injected and characteristically retracted. Her left ear showed type B tympanogram (effusion). Tympanocentesis was performed to remove middle-ear effusion, from which C. trachomatis but no ordinary bacterium was isolated. Therefore rokitamycin 300 mg/day was administered for a week. Her condition improved, however, a rhinorrhea, a plugged ear sensation and a hacking cough returned in a month. She was admitted to the hospital on May 10, for tympanostomy and grommet insertion, but from the day before admission, she had a sore throat with fever (39.2 degrees C). The surgery was withheld until May 26. When adenotonsillectomy and grommets insertion were undertaken, C. trachomatis had disappeared from the middle-ear effusion, but C. pneumoniae was recovered from both tonsillar and bronchial swabs. Readministration of rokitamycin was performed and to date (June, 1990) she remains well.

Bronchitis↗
PubMed1991

[Respiratory tract diseases due to Chlamydia pneumoniae].

A newly recognized chlamydial species, Chlamydia pneumoniae causes acute respiratory infections including pneumonia, bronchitis and pharyngitis. In this paper, eight cases of bronchitis and tonsillitis associated with C. pneumoniae are presented. Three cases came to the clinic because of persistent cough and productive sputum. C. pneumoniae was isolated from sputum of a patient and cultured in HeLa 229 cells. Other two patients were diagnosed serologically; Antibodies were measured by microimmunofluorescence using formalized elementary bodies of C. pneumoniae. A titer of 512 in the IgG class was detected. Four patients had sore throat. C. pneumoniae was isolated and cultured from tonsillar swabs in all of them. A patient with sore throat and cough diagnosed as pharyngolaryngitis was sero-positive. Antibodies to C. pneumoniae in IgG and IgM class were 128 and 32, respectively. All the patients were treated with macrolide antibiotics (erythromycin and rokitamycin), and clinical symptoms subsided. In five patients from whom the organism was isolated, the agents were eradicated by the treatment. However, clinical courses of those patients revealed that patient takes a long time to recover from the illness, if diagnosis and first choice of antimicrobial agent are not appropriate.

Adult↗
PubMed1990

[The detection of VZV DNA in the smear cells of the patients of herpes zoster by in situ hybridization using biotinylated DNA probe].

We performed the in situ hybridization (ISH) study of the smear cells taken from the patients of herpes zoster. We used the biotinylated EcoRI-B, H fragment of varicella-zoster-virus (VZV) DNA as the probe. In the control study of ISH VZV-infected cells showed strong staining, but no staining was observed in the infected cells by other herpes virus. We examined the smear cells of 19 patients of herpes zoster and 2 patients of herpes simplex by ISH. 30 of the 35 specimens of herpes zoster was positive by ISH. We detected VZV DNA in the smear cells of all cases of the bullous stage, but the sensitivity was about 75% in the later stage. Smear cells of herpes simplex was not stained by ISH. We also performed virus isolation of 13 cases of herpes zoster. But the sensitivity of ISH was higher than that of virus isolation in the other stages of herpes zoster. This method is very simple and can be completed in about 1 hour. It also has high specificity and sensitivity. So this method is very useful for the rapid diagnosis of VZV infection.

DNA Probes↗
PubMed1990

[Tonsillitis associated with Chlamydia trachomatis and antimicrobial therapy with rokitamycin].

Tonsillitis is the most common disease in the otorhinolaryngeal location. For most patients, tonsillitis is attributed to a group A streptococcal infection if the throat culture is positive for that organism or to a viral infection if the throat culture is negative. However, recent studies have shown that Chlamydia trachomatis can produce tonsillar infection. In this study, we evaluated the efficacy of Rokitamycin, a 16-membered ring macrolide antibiotic agent, in the treatment of tonsillitis associated with C. trachomatis. In 26 of 28 (92.9%) patients from whom C. trachomatis was isolated, the organism was eradicated by antimicrobial treatment with Rokitamycin of five days to three weeks' duration. In 25 of the 26 patients, they were totally free of tonsillar symptoms.

Adult↗
PubMed1990

[Detection of herpes simplex virus, varicella zoster virus and cytomegalovirus in aphthous stomatitis].

Attempts were made to demonstrate herpes simplex virus (HSV) type 1 and type 2, varicella zoster virus (VZV) and cytomegalovirus (CMV) in specimens obtained from aphthous ulceration lesions by the immunofluorescent method using fluorescein-labeled monoclonal antibodies. HSV-1 and VZV were detected in 2 and 4 out of 30 patients, respectively. Although almost all viruses that can infect the oral cavity could occasionally cause stomatitis, neither HSV-2 nor CMV was not found in this study. VZV was detected in 1 out of 8 patients with recurrent aphthous ulceration. After treatment with acyclovir, the patient's symptoms has become less severe and recurrence rates of attacks reduced, however, the patient has not been totally free of the disease. There were no differences in clinical aspects of stomatitis between the patients with and without viral isolation. Further clinical investigation is encouraged to confirm the relationship between aphthous stomatitis and viral infection.

Acyclovir↗
PubMed1984

Production of leukocidin by clinical isolates of Pseudomonas aeruginosa and antileukocidin antibody from sera of patients with diffuse panbronchiolitis.

The ratio of leukocidin-producing strains to clinical isolates of Pseudomonas aeruginosa was investigated together with the production of protease, elastase, and exotoxin A. We also examined whether these strains contain the common antigen which resides in the cell wall. By using the agar gel diffusion test with specific antisera, we found that 87 of 90 (96.7%) of clinical isolates produced leukocidin. Protease, elastase, and exotoxin A were also produced at high percentages. The common antigen was found to exist in all strains. Next, to estimate antileukocidin antibody in the sera of patients, we used an enzyme-linked immunosorbent assay with horseradish peroxidase-protein A. The sera of 39 patients with diffuse panbronchiolitis (DPB) were investigated for antileukocidin antibody. The mean antileukocidin titer in the sera of 17 DPB patients who were not infected with P. aeruginosa and 5 DPB patients who were transiently infected with the bacteria was about the same as the mean antileukocidin titer in the sera of 11 healthy controls, whereas the mean antileukocidin titer in the sera of 17 DPB patients who were persistently colonized was significantly higher than that in healthy controls. These results indicate that leukocidin was produced at the local site of infection in DPB patients.

Antibodies, Bacterial↗
PubMedDate not supplied

Isolation of Chlamydia trachomatis from the middle ear aspirates of otitis media.

Chlamydia trachomatis was cultured from the middle ear aspirates of patients with acute otitis media and otitis media with effusion (OME) to assess the relationship between the microorganism and middle ear disease. The agent was recovered in 2 of 6 patients with acute otitis media, in 3 of 13 with acute OME and in 9 of 31 with chronic OME. Serum antibody to the agent was detected in 8 of 9 patients with C. trachomatis infection in the middle ear. Chlamydial infection was found, serologically or by isolation of the agent from the genital tract, in the parents of 5 of 6 children with the infection. Therefore perinatal transmission appeared to be the most probable mode of infection in the infants. These studies indicate that C. trachomatis causes middle ear diseases more often than has been suspected.

Acute Disease↗