52. Genus Salmonella (antigens, resistance).

Question 1

Biochemistry?

Answer 1

Question 2

Biochemical characteristics?

Answer 2

Question 3

Antigens?

Answer 3

6. Antigens:

• Kauffmann-White system: O-Vi-H antigens

• composite antigens • O antigens: 35 O-groups, • K (Vi): S. Typhi, S. Dublin, etc.
• H antigens:
• specific (phase 1 flagellar antigens)
• non specific (phase 2 flagellar antigens) • monophasic serotypes: only specific H antigens
• diphasic serotypes: not only specific H antigens
• cross reactions • factor sera are used

Question 4

Resistance?

Answer 4

Medium

Question 5

Classification within serotypes?

Answer 5

Classification within serotypes C

• phage typing
• examination of the genome
• restriction endonucleases
• sequencing
• plasmid