Heterotrophic Bacteria


Also found in: Dictionary, Thesaurus, Medical.

Heterotrophic Bacteria

 

bacteria that use organic (carbon-containing) compounds as a source of energy and carbon. This characteristic distinguishes heterotrophic bacteria from chemoautotrophic (chemosynthesizing) and photoautotrophic (photosynthesizing) bacteria, which assimilate CO2 as a source of carbon. The overwhelming number of known species of bacteria, both aerobic and anaerobic, are heterotrophic. Many heterotrophic bacteria utilize sugar, alcohol, and organic acids. However, there are specialized heterotrophic bacteria capable also of decomposing cellulose, lignin, chitin, keratin, hydrocarbons, phenol, and other substances. Heterotrophic bacteria are found widely in soil, water, foods, and the bed soil of bodies of water. Heterotrophic bacteria take an active part in the natural recycling of substances.

A. A. IMSHENETSKII

References in periodicals archive ?
The results of this study indicate that exposure of rainbow trout to 0.06 portion of the 96-hour LC50 of Cu+Zn ions mixture induced a six-fold decrease in the abundance of total heterotrophic bacteria in digestive tract of rainbow trout.
Retention efficiency expressed as the percentage of heterotrophic bacteria (HetBact).
Table 5: Correlation between heterotrophic bacteria and physico-chemical parameters (p < 0.05) Panel number Temperature Salinity pH Dissolved oxygen 1 -0.38 -0.23 -0.05 0.35 2 0.17 0.21 -0.01 -0.20 3 -0.41 -0.29 0.29 0.37 4 -0.37 -0.24 -0.13 0.31 5 -0.32 -0.31 0.26 0.30 Conclusions
The EPA does not provide standards for interpreting heterotrophic bacteria; therefore, commonly used goals of surveyed laboratory animal facilities (MPN < 500/ml) were used.
Denitrification is a process where oxidized nitrogen compounds are transformed into harmless nitrogen gas by heterotrophic bacteria. Reduction of nitrite instead of nitrate results in a lower requirement for organic substrate, which is obligatory for heterotrophic denitrification [3, 4].
in the intestinal tract in relation to the control (Table 2), while in counting of total heterotrophic bacteria and Vibrionaceas there was no difference between treatments.
The sediments underwent serial dilutions and were spread directly on plate count agar (for heterotrophic bacteria) and rose bengal agar supplemented with 30 [micro]l*[ml.sup.-1] streptomycin (for fungi).
The sponge also showed the highest levels of heterotrophic bacteria, pseudomonads, coliforms/Eneterobacteriaceae, staphylococci and micrococci.
Samples of water were collected during the last four weeks of the culture to quantify Vibrio, total heterotrophic bacteria (THB), and total autotrophic bacteria (TAB).
As the product of the metabolism synthesis of microbial cells (mainly heterotrophic bacteria), the content of PS in EPSs is significantly affected by the quantity and activity of heterotrophic bacteria.