L35,36 : periodontal and orofacial bacterial infections

Question 1

what bacteria are commonly isolated from dentoalveolar abscesses?( faculitative anaerobes ) ( obligate anaerobes )

Answer 1

s. milleri
s.sanguinis
actinomyces

obligate :
prophyromonas
fusobacterium
prevotella
(usual suspects ++ peptostrptococcus ssp)
peptostreptococcus SSP

Question 2

what is Ludwig’s angina and what is it usually associated with ?

Answer 2

preading bilateral infection of sublingual and submandibular spaces ( not true abscess , instead its more like cellulitis of fascial)

associated with dental / post extraction infections

Question 3

what are the common species causing ludwigs angina?

Answer 3

prevotella spp.
porphyromonas
fusobacterium
anaerobic streptoccoi
(usual suspects )

Question 4

periodontal abscess source and microorganisms causing them ?

Answer 4

SUBgingival plaque bacteria

anaerobic gram negative rods ;
prevotella , fusobacterium , porphyromonas , anaerobic streptoccocus +++++ haemolytic streptoccocus

Question 5

microorganisms causing suppurative osteomyelitis:

Answer 5

source of infection is usually contigous focus

prevotella , porphyromonas , fusobacterium ++tannerella

S. aureus ( most common causative agent in long bone osteromyelitis is not commonly isolated from jaw bones)

Question 6

what organisms are present in subgingival plaque formation :
initial :
early lesions :
established lesions :

Answer 6

initial :
gram positive
facilitative anaerobic organisms
streptococci

early lesions :
actinomyces
capnocytophaga spp
obligate anaerobic gram negative becateria

established lesions :
porphyromonas
fusobacterium
prevotella
spirochets

Question 7

trench mouth refers to ____ and what microorganisms cause it ?

Answer 7

necrotizing ulcerative gingivitis

mainly dues to fusobacterium nucleatum or oral spirochets

Question 8

angular chilitis is associated with which microorganism ?

Answer 8

S. aureus

Question 9

herpes labialis is reactiviation of:

Answer 9

HHV-1