Past paper Q's Flashcards
What bacteria are associated with periodontal disease?
P. gingivalis
Actinobacillus
Prevotella intermedia
Bacteroides forsythus
What bacteria are associated with dental caries?
Streptococcus Mutans
Actinomyces
Bifidobacterium
Lactobacillus and Veillonella
What bacteria are associated with root canal infections?
P. endontalis
Fusobacterium nucleatum
What are virulence factors?
A pathogens ability to infect or damage its host tissues is determined by the virulence factors
These are often molecules synthesised by the bacteria or virus and encoded by their genome, but may also be acquired from the environment via transmissible genetic elements
What antimicrobial is used to disinfect root canals?
Sodium Hypochlorite
What is the difference between candidosis and candidiasis?
Candidosis affects the mouth while candidasis has systemic effects
How is biofilm formed?
Adhesion - to surface via weak VDW forces. If not removed then anchor onto surface more permanently using cell adhesion structures
Colonisation - biofilms grows via cell division and recruitment
Accumulation
Complex community
Dispersal - biofilm spread and colonise new surfaces
What are the factors important for the growth of a colonisation?
Surface roughness
Whether surface is hydrophobic/philic
What are the 5 micro-organisms in candidosis?
Candida albicans
Candida glabrata
Candida tropicalis
Candida parapsilosis
Candida krusei
Which two organisms are resistant to fluconazole?
Candida glabrata
Candida krusei
What are the treatments for candidosis?
Topical antifungals such as nystatin, miconazole
Systemic antifungals, fluconazole
Chlorhexidine
Which two organisms are resistant to fluconazole?
Candida glabrata
Candida krusei
What is a niche?
Role of an organism in an environment
What is faculative anaerobic?
Usually respires aerobically but can respire anaerobically if no air present
What is obligately anaerobic?
Can only breathe anaerobically
It is harmed in the presence of oxygen
