Apparatus and process for microbial detection and enumeration

摘要

An apparatus and process for detecting and enumerating specific microorganisms from large volume samples containing small numbers of the microorganisms wherein the large volume samples are filtered through a membrane filter 23 to concentrate the microorganisms and filter 23 is positioned between two absorbent pads 21 and 25 previously moistened with a growth medium for the microorganisms. A pair of electrodes 13 and 15 are disposed against filter 23 and the pad- electrode-filter assembly retained within a petri dish 17 by retainer ring 27. Cover 29 is positioned on base 19 of petri dish 17 and sealed at the edges thereof by a parafilm seal prior to being electrically connected via connectors 14 and 16 to strip chart recorder 11 for detecting and enumerating the microorganisms collected on filter 23.