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T Akitsu

Publications and source records attributed to T Akitsu.

4 recordsLinked to original sources
PubMed2002

Fate of coliphage in waste water treatment process and detection of phages carrying the Shiga toxin type 2 gene.

Abundances of phages specific to Escherichia coli in the wastewater treatment process were analyzed. Relatively abundant coliphages were detected in sewage influent. Phages in the influent were found both suspended in liquid phase and attached on the solid particles. Phage concentration was not reduced in the settling tank without chemical agglutination. Anaerobic followed by aerobic treatment of the sewage reduced concentration of suspended phages. Almost no phage was detected as a suspended form in the aerobic tank. Most of the phages were detected as attaching form and were excluded by aggregation with sludge. Using an experimental approach based on the detection of Shiga toxin 2 (Stx 2) gene by a phage enrichment culture followed by nested PCR, bacteriophages carrying Stx 2 gene were detected in the influent, settling tank, and anaerobic tank. It was revealed that the presence of phages carrying Stx 2 gene is common in sewage and these phages are effectively eliminated through sewage treatment process.

Coliphages↗
PubMed1994

Effect of temocapril on haemodynamic and humoral responses to exercise in patients with mild essential hypertension.

1. This study was carried out to evaluate the effect of temocapril on haemodynamic and humoral responses to exercise in nine patients with mild essential hypertension (WHO stages I and II). 2. After a 4-week placebo period, temocapril was administered at a dose of 1.0 mg once daily for 2-4 weeks. Graded submaximal bicycle ergometer exercise was performed before and after temocapril treatment, and the changes in arterial blood pressure, heart rate, cardiac output (CO), and systemic vascular resistance (SVR) were evaluated. In addition, the plasma norepinephrine (NE) level was determined both at rest and peak exercise before and after temocapril treatment. 3. Both the systolic and diastolic blood pressure were reduced at rest and during exercise by temocapril treatment. No significant change in the resting heart rate and CO was observed, and the exercise-induced increase of these parameters was also not affected by temocapril. In contrast, the resting SVR was significantly decreased by temocapril, although the exercise SVR was similar during both temocapril and placebo treatment. 4. Although there was no significant change in the plasma NE level with temocapril treatment, the exercise-induced increase of plasma NE was significantly suppressed by temocapril. 5. These results indicate that temocapril reduces the blood pressure without causing any significant changes in the heart rate and CO at rest, and that it does not produce any changes in the haemodynamic response to exercise.

Adult↗
PubMed1990

[Long-term prognosis related to coronary risk factors, clinical characteristics of acute myocardial infarction and coronary angiographic findings in the elderly].

In order to clarify the characteristics of acute myocardial infarction in the elderly, we investigated the clinical profile and long-term prognosis of patients with myocardial infarction in the past 13 years. The early fatality rate (within 30 days after onset) in the relatively younger patients (less than 65 years old) was 8.8%, and in the older patients (greater than 65 years old) was 29.1%. The fatality rate was significantly higher in older than in younger patients. On coronary and left ventriculography, the older patients showed multi-vessel lesions with decreased ejection fraction and cardiac index. According to the cumulative survival curves related to the coronary risk factors, no significant differences were found with or without smoking or hypertension. However, the long-term prognosis of the patients with controllable hypercholesteremia was better than in uncontrollable patients less than 65 years old. No significant difference was found in patients with hypercholesteremia over age 65. The long-term prognosis of the patients with uncontrollable diabetes mellitus was worse than that of controllable diabetic patients.

Aged↗