Bacteria 2

Question 1

What is pulp exposure due to

Answer 1

Inter proximal dental caries

Question 2

What is the interaction between bacterial cells and host defence mechanism

Answer 2

Sinus caused by acute dental alveolar or infection which is discharged through little border of the mandible

Question 3

Bacteria (1)

Answer 3

Genome, outer capsule and protective layers, other bacteria components, pili, bacterial flagellum

Question 4

Bacteria (2)

Answer 4

Fimbriae (pili), membranous invagination, cytoplasmic membrane, capsule (1 micrometer), cell envelope, inclusion granules

Question 5

Bacteria (2)

Answer 5

Fimbriae (pili), membranous invagination, cytoplasmic membrane, capsule (1 micrometer), cell envelope, inclusion granules

Question 6

Attachment

Answer 6

Pili (fimbriae) - gram - ve’s. Proteinaceous with variable dimensions (4-10 nano wide and 0.5 to 4 micro long). Overcome mechanical forces. Specificity to host and tissue. Pilin would around core (hallow core). Pili attached to host glycolipid/glycoprotein on host membrane

Question 7

Surface associated virulence factors

Answer 7

Fimbriae/pili, fibrillae, colonisation factors - adhesion and antiphagocytic

Flagella, axial filaments - chemotaxis, penetration of mucus

Question 8

Oxygen

Answer 8

Aerobic

Question 9

Carbon dioxide

Answer 9

Capnophilic

Question 10

With and without oxygen

Answer 10

Facultative

Question 11

Without oxygen

Answer 11

Anaerobic

Question 12

Require small amounts of oxygen

Answer 12

Microaerophilic

Question 13

How do bacteria grow

Answer 13

Binary fission

Question 14

Bacterial growth kinetics

Answer 14

Lag phase (inoculated into system), logarithmic phase, stationary phase (cell growth = death, death

Number of cells (log)

Question 15

Benchtop steam sterilizer of dental instruments
Type B process

Answer 15

Pretreatment (air removal by fractioned prevacuum), sterilization holding time (134 degrees), post treatment (drying by postvacuum)