Growth Dynamics of Salmonella

log phase lasted for 9 days. Maximum bacterial population

of 9.1 × 10 6 CFU/ml was attained on day 17. Generation

of 7.9 × 10 7 CFU/ml was attained on day 12. Generation

time for S ₁ was 45.45 hrs.

time for S ₆ was 15.15 hrs.

Isolate S : S had bacterial count of 5.2 × 10 4 CFU/ml on

2

2

Isolate S ₇ : The initial bacterial count of the isolate was 3.9

day zero and attained maximum population of 8.6 × 10 6

× 10 4 CFU/ml. Lag phase was of 3 days duration and log

CFU/ml on day 12. The lag phase and log phase lasted

phase lasted for 9 days. Maximum bacterial population of

for 4 and 13 days respectively. Generation time for S ₂ was

6.8 x10 8 CFU/ml was attained on day 12. Generation time

45.30 hrs.

for S ₇ was 15.72 hrs .

Isolate S : The initial bacterial count of the isolate was 3.2

3

× 10 4 CFU/ml. Lag phase was of 4 days duration and log

Growth of isolates, obtained from eggs, at 10°C at pH

phase lasted for 13 days. Maximum bacterial population

5.5

of 9.5 × 10 6 CFU/ml was attained on day 17. Generation

Isolate S : It had bacterial count of 4.1 × 10 3 CFU/ml on

time for S ₃ was 42.00 hrs.

8

day zero and attained maximum population of 7.6 × 10 7

CFU/ml on day 12. The lag phase and log phase lasted

Growth of the isolates, obtained from poultry cloacal

for 3 and 9 days respectively. Generation time for S ₈ was

swabs, at 10°C with pH of 4.5

15.87 hrs.

Isolate S : The initial bacterial count of the isolate was 4.3

4

× 10 5 CFU/ml. Lag phase was of 4 days duration and log

Growth of isolates, obtained from human diarrheic

phase lasted for 13 days. Maximum bacterial population

cases, at 10°C at pH 5.5

of 8.9 × 10 7 CFU/ml was attained on day 17. Generation

Isolate S : The initial bacterial count of the isolate was 3.9

time for S ₄ was 43.48 hrs.

9

× 10 4 CFU/ml. Lag phase was of 3 days duration and log

Isolate S ₅ : It had bacterial count of 57.4 × 10 4 CFU/ml on

phase lasted for 9 days. Maximum bacterial population of

day zero and attained maximum population of 9.1 × 10 6

7.5 × 10 8 CFU/ml was attained on day 12. Generation time

CFU/ml on day 17. The lag phase and log phase lasted

for S ₉ was 15.64 hrs.

for 4 and 13 days respectively. Generation time for S ₅ was

45.45 hrs.

Isolate S ₁₀ : The initial bacterial count of the isolate was

2.6 × 10 3 CFU/ml. Lag phase was of 3 days duration and

Isolate S The bacterial count of the isolate was 6.5 × 10 4

6 :

log phase lasted for 9 days. Maximum bacterial population

CFU/ml on day zero. Lag phase was of 4 days duration

of 6.6 × 10 7 CFU/ml was attained on day 12. Generation

and log phase lasted for 13 days. Maximum bacterial

time for S ₁₀ was 15.10 hrs.

population of 9.2 x10 6 CFU/ml was attained on day 17.

Isolate S : It had bacterial count of 2.6 × 10 4 CFU/ml on

Generation time for S ₆ was 45.45 hrs.

11

day zero and attained maximum population of 8.4 × 10 8

Isolate S ₇ : The initial bacterial count of the isolate was 2.2

CFU/ml on day 12. The lag phase and log phase lasted

× 10 4 CFU/ml. Lag phase was of 4 days duration and log

for 3 and 9 days respectively. Generation time for S ₁₁ was

phase lasted for 13 days. Maximum bacterial population

15.36 hrs.

of 9.1 × 10 6 CFU/ml was attained on day 17. Generation

time for S ₇ was 41.66 hrs.

Growth of Salmonella isolates at 10 ° C with pH of 4.5

Growth of the isolates, obtained from eggs, at 10°C

Growth of the isolates, obtained from raw poultry

with pH of 4.5

meat, at 10 ° C with pH of 4.5

Isolate S ₈ : It had bacterial count of 4.4 × 10 4 CFU/ml on

day zero and attained maximum population of 8.6 × 10 6

Isolate S ₁ : The initial bacterial count of the isolate was 6.4

× 10 4 CFU/ml. Lag phase was of 4 days duration and log

CFU/ml on day 17. The lag phase and log phase lasted

phase lasted for 13 days. Maximum bacterial population

for 4 and 13 days respectively. Generation time for S ₈ was

43.47 hrs.

Journal of Animal Research: v.5 n.1. April 2015

91