Growth Dynamics of Salmonella
of 7.4x10 9 CFU/ml was attained after 30 hrs. Generation
Growth of isolates, obtained from eggs, at 30 0 C at pH
time for S 11 was 60 min.
4.5
Isolate S 8 : The initial bacterial count of the isolate was
Growth of the isolates at 30 o C at pH 4.5
1.3 × 10 3 CFU/ml. Lag phase was of 12 hrs duration and
Growth of isolates, obtained from raw poultry meat, at
log phase lasted for 51 hrs. Maximum bacterial population
30°C at pH 4.5
of 7.4 x10 8 CFU/ml was attained after 33 hrs. Generation
Isolate S : The initial bacterial count of the isolate was 1.6
time for S 8 was 125.4 min.
1
× 10 3 CFU/ml. Lag phase was of 12 hrs duration and log
phase lasted for 39 hrs. Maximum bacterial population of
Growth of isolates, obtained from human diarrheic
9.2 × 10 8 CFU/ml was attained after 51 hrs. Generation
cases, at 30°C at pH 4.5
time for S 1 was 125.4 min.
Isolate S : The initial bacterial count of the isolate was 1.7
9
Isolate S 2 : S 2 had bacterial count of 1.4 × 10 3 CFU/ml
× 10 3 CFU/ml. Lag phase was of 12 hrs duration and log
on day zero and attained maximum bacterial population
phase lasted for 39 hrs. Maximum bacterial population of
of 8.8 × 10 8 CFU/ml after 51 hrs. The lag phase and log
7.8 × 10 8 CFU/ml was attained after 51 hrs. Generation
phase lasted for 12 and 39 hrs respectively. Generation
time for S 9 was 128.4 min.
time for S 2 was 121.2 min.
Isolate S : It had bacterial count of 1.6 × 10 3 CFU/ml on
10
Isolate S The initial bacterial count of the isolate was 1.8
3 :
zero hrs and attained maximum population of 9.2 × 10 8
× 10 3 CFU/ml. Lag phase was of 12 hrs duration and log
CFU/ml after 51 hrs. The lag phase and log phase lasted
phase lasted for 39 hrs. Maximum bacterial population of
for 12 and 39 hrs respectively. Generation time for S 10
7.4 × 10 8 CFU/ml was attained after 27 hrs. Generation
obtained was 128.4 min.
time for S 3 was 127.8 min.
Isolate S : The bacterial count of the isolate was 2.4 × 10 3
11
Isolate S 4 : The initial bacterial count of the isolate was 1.4
CFU/ml on zero hrs. Lag phase was of 12 hrs duration and
× 10 2 CFU/ml. Lag phase was of 12 hrs duration and log
log phase lasted for 39 hrs. Maximum bacterial population
phase lasted for 39 hrs. Maximum bacterial population of
of 9.8 × 10 8 CFU/ml was attained after 51 hrs. Generation
8.7 × 10 7 CFU/ml was attained after 51 hrs. Generation
time for S 11 recorded was 127.8 min.
time for S 4 was 123.6 min.
Isolate S 5 : It had bacterial count of 1.5 x10 2 CFU/ml on
Growth of the isolates at 10°C with pH of 6.5
zero hrs and attained maximum population of 8.2 × 10 7
CFU/ml after 51 hrs. The lag phase and log phase lasted
Growth of isolates, obtained from raw poultry meat, at
for 12 and 39 hrs respectively. Generation time for S 5 was
10°C at pH 6.5
128.4 min.
Isolate S : The initial bacterial count of the isolate was 6.4
1
Isolate S The bacterial count of the isolate was 1.5 × 10 2
6 :
× 10 3 CFU/ml. Lag phase was of 48 hrs duration and log
CFU/ml on zero hrs. Lag phase was of 12 hrs duration and
phase lasted for 168 hrs. Maximum bacterial population
log phase lasted for 39 hrs. Maximum bacterial population
of 8.8 × 10 8 CFU/ml was attained on day 9 with the
of 8.3 × 10 7 CFU/ml was attained after 51hrs. Generation
generation time of 10.30 hrs.
time for S 6 was 127.8 min.
Isolate S 2 : S 2 had bacterial count of 4.4 × 10 4 CFU/ml on
Isolate S 7 : S 7 had bacterial count of 1.5 × 10 3 CFU/ml on
day zero and attained maximum population of 8.8 × 10 9
zero hrs and attained maximum bacterial population of 9.1
CFU/ml on day 9. The lag phase and log phase lasted for
× 10 8 CFU/ml after 51 hrs. The lag phase and log phase
2 and 7 days respectively. Generation time for S 2 was 10.0
lasted for 12 and 39 hrs respectively. Generation time for
hrs.
S 7 was 126 min.
Isolate S 3 : The initial bacterial count of the isolate was 6.4
× 10 2 CFU/ml. Lag phase was of 2 days duration and log
phase lasted for 7 days. Maximum bacterial population of
Journal of Animal Research: v.5 n.1. April 2015
89