Class notes BMLT-303 (M301)

Anatomical Total Anaerobi Anaerobic normal Aerobic normal bacterial flora,
site bacteria c bacterial flora commensal fungi and parasite
/g or ml /aerobic (common)
ratio
Mouth Predominant Less predominant
Saliva 108 -109 1:1  Anaerobic cocci Viridans Commensal
 Actinomyces streptococci parasites in oral
Tooth surface 1010-1011 1:1
 Fusobacterium cavity
Gingiva 1011-1012 103:1  Bifidobacterium  Trichomonas
 Prevotella tenax
 Spirochetes  Entamoeba
gingivalis
Nasopharynx Predominant Less predominant
 Prevotella species  Strptococci (α  Haemophilus
 Anaerobic cocci and non  Meningococcus
 Fusobacterium hemolytic)  Pneumococcus
 Neisseria (non-  Stephylococcus
pathogenic  Gram-negative
species) rods
 Diphtheroids  yeasts
 Staphylococcus
epidermidis
Gastrointestinal tract Predominant Less predominant
Stomach 0-105 1:1 Lactobacillus Helicobacter pylori
Jejunum/ileu 104-107 1:1  Anaerobic cocci  Enterobacteriaceae  Diphtheroids
m  Bacteroides fragilis and other GNB  Candida
Terminal 1011-1012 103:1  Fusobacterium  Enterococci species
ileum and  Bifidobacterium  Streptococci(α and  Stephylococcus
 Prevotella non hemolytic),
aureus
colon
 clostridium S.agalactiae
 Commensal
entamoeba
species
 Commensal
intestinal
flagellates
Female genital tract Predominant Less predominant
Vagina 107-109 10:1  Anaerobic cocci  Corynebacteriu  Enterobacteriacea
 Lactobacillus m species e and other GNB
 Bifidobacterium  Lactobacillus  Enterococci
 Prevotella species  S.epidermidis
 clostridium  Strptococci (α  Candida
and non species
hemolytic)
 Neisseria (non-
pathogenic
species)

Skin Predominant Less predominant
102-103 3:2  Propionibacteriu  Strptococci (α  Stephylococcus
m and non aureus
 Anaerobic cocci hemolytic)  Candida
 Neisseria (non- species