Length of incubation for enumerating nitrifying bacteria present in various environments

Appl Microbiol. 1975 Feb;29(2):265-8.

Abstract

The effect of incubation time on most-probable-number estimates of autotrophic nitrifying bacteria was investigated by using waters, rooted aquatic plants, sediments, and slimes as inoculum sources. Maximum most probable numbers of the NH4+-oxidizing group were attained in 20 to 55 days (median, 25). Estimates of NO2-oxidizers were highest at termination (103 to 113) days.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Ammonia / metabolism
  • Bacteria / isolation & purification*
  • Bacteria / metabolism
  • Bacteriological Techniques / standards*
  • Cell Count
  • Nitrites / metabolism
  • Oxidation-Reduction
  • Plants / microbiology*
  • Sewage
  • Soil Microbiology*
  • Time Factors
  • Water Microbiology*

Substances

  • Nitrites
  • Sewage
  • Ammonia