Bacteria Flashcards
(93 cards)
bacterial complexes
the composition of the different color coded complexes is based on the frequency with which the organisms are encountered together
blue and purple complex
what are these considered?
consists of gram-positive cocci and rods
PRIMARY COLONIZERS
yellow complex
is compromised of gram-negative faculative cocci
green complex
contains gram-positive and negative rods and cocci- biut NON-motile species present
orange complex + importance
demonstrates a higher concentration of gram-negative rods and cocci, with some motile species present
what we see with perio patients
red complex and importance
is EXCLUSIVELY gram-negative , MOTILE anaerobes
what we see with perio patients
bacteria present in the red complex
P. gingivalis
T. denticola
T. forysthensis
bacteria present in green complex
A. actinomycetemcomitans
red and orange complex?
implicated in perio patients with higher
- patients will develop symptoms of perio in these complexes
you dont want these
will you ever find a patietn with just red and orange complex?
NO - they need the primary colonizers to adhere
transition from health to disease?
gram - positive, aerobic, non-motile —> gram-negative, anaerobic, motile
where does anaerobic bacteria thrive?
sulcus – attachment apparatus here
gingivitis association with complexes?
early colonizers are associated with mild, gingival inflammation (gingivitis)
shear mass of plaque is more geared toward what hypothesis?
non-specific plaque hypothesis
what does non-specific theory represent?
gingivitis
plaque hypothesis of periodontitis?
introduction of specific bacteria
-ecological plaque hypothesis – triggers some species to become more aggressive
late colonizers implication?
“red complex” – are associated with severe periodontal inflammtion
how does bacteria cause disease?
steps..7 total
when this sequence occurs…
- acquisition
- adherence or retention
- initial survival
- prosperity and long-term survival
- avoidance of elimination
- multiplication
- elaboration of virulence factors
vertical transmission
occurs at birth from parental and other environmental sources
endogenous organisms
those organisms already present within the host when the disease is developed
exogenous organisms
those acquired from other individuals or the environment which may initiate the disease process or enable its progression
main microbes in oral cavity and amount
up to 10^3 bacteria per MILLIMETER. types - streptococci - staphylococci - Cornyebacteria - Neisseria, -LActobacilli, - Candida -- note this is a fungus
important colonizer on the surface of teeth?what aids the growth of lactobacilli?
Streptococcus mutans is an important colonizer on the surface of the teeth (especially in those with a high sucrose diet)
when sugar is broken down – lactic acid— lowers pH in mouth and aids growth
- usually above process done by streptococcus
streptococcus mutans importance in oral cavity and location?
mostly colonizers on the surface of the teeth and are more prevalent in patients that have a high sucrose diet and will break down this sugar and lactic acid will be produced– attacks surface