Survival response of Bacteriovorax in surface biofilm versus suspension when stressed by extremes in environmental conditions

Microbial Ecology
H N WilliamsJacqueline I Kelley


The Bacteriovorax, previously in the genus Bdellovibrio, are prokaryotes that prey upon many Gram-negative bacteria. They are ubiquitous in salt-water environments and have been reported to have a strong association with biofilms. The purpose of this study was to test the hypothesis that this association affords protection for the Bacteriovorax and enhances their survival in nature when exposed to extreme environmental conditions. Experiments were designed to compare their survival in biofilms versus in suspension when exposed to extremes in salinity and temperature. Natural mixed-population biofilms generated in moderate-salinity (16 per thousand) Patuxent River water and containing Bacteriovorax were exposed to drastic changes in salinity by placing in low-salinity (1 per thousand) river water and salt-free (no measurable salinity) distilled water for up to 14 days. In a separate trial, the biofilm was exposed to extremes in temperature, 5 degrees C and 35 degrees C, for up to 12 weeks in aquarium mesocosms. Simultaneously, suspensions of the Bacteriovorax were exposed to the same extremes in salinity and temperature as biofilms. The results revealed that the Bacteriovorax typically were able to survive for a week or longer w...Continue Reading


Apr 1, 1976·Applied and Environmental Microbiology·J C Fry, D G Staples
Jul 4, 1974·Archives of Microbiology·V I TaylorR D Allen
Mar 1, 1973·The Journal of Applied Bacteriology·D G Staples, J C Fry
Nov 1, 1980·Applied and Environmental Microbiology·H N WilliamsD E Shay
Jul 8, 2005·Applied and Environmental Microbiology·Daniel E Kadouri, George A O'Toole
Jul 1, 1978·Applied and Environmental Microbiology·A Marbach, M Shilo
Jan 1, 1979·Applied and Environmental Microbiology·M Fletcher, G I Loeb
Jan 1, 1990·Applied and Environmental Microbiology·A J Schoeffield, H N Williams
Apr 1, 1992·Applied and Environmental Microbiology·J Kelley, H N Williams
Jan 1, 1995·Microbial Ecology·H N WilliamsW A Falkler
Dec 1, 1975·Microbial Ecology·A MarbachM Shilo


Aug 21, 2012·Applied and Environmental Microbiology·Gary P RichardsE Fidelma Boyd
Jan 24, 2014·International Journal of Microbiology·Gary P RichardsJohnna P Fay
May 4, 2012·FEMS Microbiology Ecology·Sandra L WilsonVirginia K Walker
Jul 26, 2016·Frontiers in Microbiology·Mario López-PérezFrancisco Rodriguez-Valera
Dec 25, 2015·Microbiology and Molecular Biology Reviews : MMBR·Hongyue Dang, Charles R Lovell
Dec 30, 2015·Applied and Environmental Microbiology·Somdatta MukherjeeDaniel E Kadouri
May 1, 2020·Frontiers in Microbiology·Eleni BratanisEwa Bukowska-Faniband
Jul 25, 2019·International Journal of Molecular Sciences·Wen YinJin He

Related Concepts

Cold Temperature
Water Microbiology
Microbial Biofilms
Virus Viability
Clinical Trials
Gram-Negative Bacteria

Related Feeds

Biofilm & Infectious Disease

Biofilm formation is a key virulence factor for a wide range of microorganisms that cause chronic infections.Here is the latest research on biofilm and infectious diseases.