MEMBRANE FILTER METHOD FOR DETERMINATION OF COLIFORMS IN PASTEURIZED AND CERTIFIED MILK

1953 ◽  
Vol 16 (1) ◽  
pp. 6-8 ◽  
Author(s):  
Richard Ehrlich
Keyword(s):  
Agar Medium ◽  
Membrane Filter ◽  
Filter Method ◽  
Membrane Filter Method ◽  
Determination Methods ◽  
Future Reference

The use of the membrane-filter method for determination of coliform organisms in pasteurized and certified milk permits a more rapid counting of coliform colonies with the elimination of much of the plating procedure used with the conventional determination methods. Results of analysis for coliform content can be preserved on the membranes for future reference. Large quantities of milk can be examined rapidly through the use of the centrifuge in the method outlined. Endo-agar was used in this work as the differential agar medium.

The Microbiological Quality of Honey as Determined by Aerobic Colony Counts

1993 ◽  
Vol 56 (4) ◽  
pp. 336-337 ◽  
Author(s):  
JOSEP SERRA BONVEHI ◽  
ROSSEND ESCOLÁ JORDÁ
Keyword(s):  
Membrane Filter ◽  
Microbiological Quality ◽  
Plate Count ◽  
Filter Method ◽  
Filter Methods ◽  
Plate Counts ◽  
Multifloral Honey ◽  
Plate Count Method ◽  
Membrane Filter Method

The number of mesophilic aerobic colonies was determined in 72 samples of mono- and multifloral honey from various sources by the plate count and the membrane filter methods. The presence of motile colonies made the plate counts unreliable. The microorganism producing these colonies was identified as Bacillus alvei. Colony counts could only be carried out in 27 of the samples when using the plate count method, while with the membrane filter method the number of colonies was counted in all the samples.

scholarly journals Improved Membrane Filter Method for Fecal Coliform Analysis

1975 ◽  
Vol 29 (4) ◽  
pp. 532-536 ◽  
Author(s):  
Robert E. Rose ◽  
Edwin E. Geldreich ◽  
Warren Litsky
Keyword(s):  
Fecal Coliform ◽  
Membrane Filter ◽  
Filter Method ◽  
Membrane Filter Method

Acceptability of Individual Water Supplies as Judged by a Single Test for Total Coliform Bacteria

1980 ◽  
Vol 43 (7) ◽  
pp. 563-563
Author(s):  
E. P. MERRILL
Keyword(s):  
Membrane Filter ◽  
Total Coliform ◽  
Coliform Bacteria ◽  
Most Probable Number ◽  
Filter Method ◽  
Single Test ◽  
Water Supplies ◽  
Probable Number ◽  
Dug Wells ◽  
Membrane Filter Method

Of 658 individual water supplies tested over an 8-year period, 69% of drilled wells, 62% of driven wells, 27% of dug wells and 32% of springs were judged acceptable on the basis of a single test for total coliforms. The acceptability standard consisted of 0 to 1 coliforms/100 ml of sample by the membrane filter method or a Most Probable Number index of less than 2.2 (presumptive and confirmed tests).

Hydrophobic Grid Membrane Filter Method for Aerobic Plate Count in Foods: Collaborative Study

1986 ◽  
Vol 69 (4) ◽  
pp. 671-676 ◽  
Author(s):  
Phyllis Entis ◽  
◽  
J Allen ◽  
A Bhatnagar ◽  
A Brouwer ◽  
...  
Keyword(s):  
Membrane Filter ◽  
Collaborative Study ◽  
Raw Milk ◽  
Plate Count ◽  
Filter Method ◽  
Membrane Filter Method ◽  
Aerobic Plate Count ◽  
Egg Powder ◽  
Raw Poultry ◽  
Whole Egg

Abstract Twenty-one laboratories participated in a collaborative study to validate a hydrophobic grid membrane filter (HGMF) method for aerobic plate count by comparing its performance against the AOAC/APHA pour plate method. Raw milk, raw poultry, whole egg powder, flours, and spices were included in the study. Counts obtained by the HGMF and pour plate methods did not differ significantly, except in the case of whole egg powder, for which the HGMF method produced significantly higher counts. The hydrophobic grid membrane filter method for aerobic plate count in foods has been adopted official first action.

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