Seroprevalence and Immunopathological Studies of
Salmonella pullorum in Broiler Birds in District Faisalabad
Pakistan
Nasir Mahmood1, Farzana Rizvi1*,
Muhammad Kashif Saleemi1 and Muhammad Aamir Aslam2
1Department
of Pathology, Faculty of Veterinary Science, University of
Agriculture, Faisalabad, Pakistan
2Institute
of Microbiology, Faculty of Veterinary Science, University of
Agriculture, Faisalabad, Pakistan
*Corresponding author:
frizivi@yahoo.com
Abstract
Salmonella pullorum(S. pullorum)
seroprevalence was determined, followed by isolation and molecular
characterization in commercial poultry in district Faisalabad, Pakistan. The
bacterin vaccine was prepared from the local isolate of S. pullorum and
its efficacy was evaluated in broiler chicks. For seroprevalence, a total of 384
boiler farms were screened. Seroprevalence of S. pullorum in broiler was
11.72%. The collected tissue samples (liver, spleen, and intestine) from
seropositive birds were processed on different media (Xylose lysine deoxycholate
agar, Salmonella shigella agar and MacConkey agar) for bacterial isolation of
S. pullorum. Molecular detection was done with the help of
polymerase chain reaction followed by bacterin preparation. An experimental
trial was done to compare the efficacy of bacterin with the commercial vaccine (Poulvac
®, USA). A total of 120 broiler birds were divided into four groups (G1-G4)
designed as G1 (negative control), G2 (infected with S. pullorum, G3 (bacterin
+ S. pullorum infection),
and G4 (commercial vaccine (Poulvac®) + S. pullorum infection). Higher morbidity (80%) and
mortality rates (60) were in group G2 as compared to the group (G3 and G4).
Gross and histopathological lesions were highest in group G2 as compared to
other groups. In conclusion, the locally prepared bacterin provides better
protection in terms of mortality and morbidity and enhances humoral immune
response in broiler birds.
To Cite This Article:
Mahmood N, Rizvi F, Saleemi MK, and Aslam MA,
2022. Seroprevalence and
immunopathological studies of Salmonella pullorum in broiler birds in
district Faisalabad Pakistan. Pak Vet J, 42(1): 47-52. http://dx.doi.org/10.29261/pakvetj/2022.010