PubMed · 4209812
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M Martini. 1973. [Extra-respiratory tuberculosis].. https://pubmed.ncbi.nlm.nih.gov/4209812/
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This present study was undertaken to find optimum conditions of pH, temperature and, period of incubation for the pectinolytic activity of Kluyveromyces wickerhamii isolated from rotting fruits and to assess the effect of these factors by use of response surface methodology (RSM). A central composite rotatable design was used as an experimental design for the analysis of the allocation of treatment combinations. A second order polynomial regression model was fitted and was found adequate, with an R(2) of 0.94469 (P<0.001). The effects of temperature and pH were the most significant factors in influencing enzyme production. Estimated optimum conditions were as follows: pH 5.0, temperature, 32 degrees C and an incubation period of 91 h. Pectinesterase (PE), pectin lyase (PL), and cellulase activities were not detected. Pectinase production was partially constitutive. Pectin was degraded by the isolated strain of K. wickerhamii in the current study, and the pectinolytic activity is referred to as polygalacturonase (PG) activity. Crude enzyme extract was thermostable at various temperatures and, stimulated by the presence of Ca(2+) ions but inhibited by other ions like Mg(2+), Zn(2+), Co(2+), Mn(2+) and Na(+).
BACKGROUND: We wanted to determine the usefulness of chemical dipstick tests and office culture in diagnosing asymptomatic bacteriuria in pregnant women in general practice. MATERIAL AND METHODS: Dipstick and office urine culture were compared with standard culture results from a microbiology laboratory. The comparison was based on 294 urine samples obtained from pregnant women in a standard general practice setting. RESULTS: Asymptomatic bacteriuria was found in 16 out of 294 urine samples. The sensitivity of dipstick tests was less than 30%. The positive predictive value was 100% for the nitrite test and 40% for office culture. INTERPRETATION: Standard urine culture is the only way to diagnose asymptomatic bacteriuria.