Comparison of methods for enumeration of selected coliforms exposed to ozone.

نویسندگان

  • J C Adams
  • M S Lytle
  • D G Dickman
  • D H Foster
  • J P Connell
  • W R Bressler
چکیده

mT7 medium performed no better than m-Endo medium in enumerating cells of Escherichia coli and Citrobacter freundii exposed to ozone. Also, there was no difference in the plate count of heterotrophic bacteria in ozonated raw water determined on modified Henrici agar or R2A agar. Statistically significant differences were seen between bacteria and the type of water in which they were suspended during ozonation.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Comparison of Conventional Plating and Simplate Methods for Enumeration of Aerobic Microorganisms, Coliform and Escherichia Coli in Farm Environmental Samples

The objective of this study was to compare conventional plating to SimPlate methods for enumeration of aerobic microorganisms, coliforms and Escherichia coli in samples from farm animals and their environment. Samples evaluated included rectal swabs, fecal material, bedding, litter and feed and soil from beef and dairy cattle, swine and poultry farms. Standard method agar pour plating and conve...

متن کامل

Comparison of fecal coliform agar and violet red bile lactose agar for fecal coliform enumeration in foods.

A 24-h direct plating method for fecal coliform enumeration with a resuscitation step (preincubation for 2 h at 37 +/- 1 degrees C and transfer to 44 +/- 1 degrees C for 22 h) using fecal coliform agar (FCA) was compared with the 24-h standardized violet red bile lactose agar (VRBL) method. FCA and VRBL have equivalent specificities and sensitivities, except for lactose-positive non-fecal colif...

متن کامل

The efficacy of gaseous ozone against different forms of Candida albicans

Background and Purpose: Ozone is an inorganic molecule with effective antimicrobial properties. Clinical treatment of ozonated water was used for the elimination of Candida albicans, Enterococcus faecalis, endotoxins, and biofilms from root canals. In addition, its therapeutic effects for tinea pedis, ulcers, and leishmaniasis were investigated. The purpose of the present study was to evaluate ...

متن کامل

EU Drinking Water Directive reference methods for enumeration of total coliforms and Escherichia coli compared with alternative methods.

AIMS The reference methods for enumeration of total coliforms and Escherichia coli as stated in the European Drinking Water Directive were compared with alternative methods. METHODS AND RESULTS Laboratories used the reference method on Lactose TTC agar (LTTC), the Colilert/18 system, Laurysulphate Agar (LSA), Chromocult Coliform Agar and the E. coli Direct Plating (DP) method. They enumerated...

متن کامل

Comparative study on chemical pretreatment (acid and ozone) methods for improving enzymatic digestibility of sugar cane bagasse

Sugarcane bagasse contains cellulose, lignin and hemicellulose, 39-42%, 20-25% and 25-27% respectively. So it is can be used as a sugar source in many processes. Lignin and hemicellulose must be removed before hydrolysis of cellulose. Several different pretreatment approaches have been studied. The purpose of this research is comparison of acid, ozone and combination of ozone-acid as pretreatme...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Applied and environmental microbiology

دوره 55 1  شماره 

صفحات  -

تاریخ انتشار 1989