What is the survival time of anerobic bacteria like porphyromonas gingivalis, actinobacillus, prevotella intermedia, fusobacterium nucleatum in aerobic environment? How they survive? These are periodontal pathogens which are of significance.
Hi. I guess the survival time for both aerobic and anaerobic conditions is still in controversy. Most of the studies reported that it takes certain period of time to survive both conditions (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4219685/#pone.0110616-Belton1). How it survives in aerobic condition, this link may give you a bit idea (Survival of Oral Bacteria http://cro.sagepub.com/content/9/1/54.short). Yes definitely, these are the causative microbes which initiates periodontitis and there levels could make significant difference in disease progression.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4219685/#pone.0110616-Belton1)
Dear Yadav
Newly isolated strickly anaerobic bacteria can alive 5-10 minutes or shorter. When they are serially subpassaged with enhancing O2 concentrations, then their new generations begin tolerate O2 20% even ~100 hours.
Surviving time depends on Eh, growth medium, metabolic specifities of the cell, last electron acceptor at the membran.
Hi.
You might find these two papers of interest in terms of survival of P. gingivalis.
Nakayama 1994 (superoxide mutant) http://www.ncbi.nlm.nih.gov/pmc/articles/PMC205297/pdf/jbacter00025-0141.pdf
Diaz and Rogers 2004
http://www.ncbi.nlm.nih.gov/pubmed/14871347
Regards,
John Smalley
Survival time varies with type of bacteria and their stage of growth. In the exponential stage they are (for the most part) very sensitive to oxygen (die off real fast) but in the stationary phase on laboratory media they can survive a very long time. For example P.gingivalis last for days. Spirochaete, you better keep them anaerobic all the time. Almost all of the anaerobic bacteria (especially periodontal pathogens) are most sensitive when you remove them from the host. If you do not get them into pre-reduced transport media immediately your recovery goes down exponentially. That is why DNA probes are so helpful.
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