Genetic Variations in Haematological Indices of Local and Exotic Turkeys Inoculated with Attenuated Salmonella typhimurium Vaccine

Abstract

Infection due to Salmonella spp is one of the threatening diseases to poultry industry because it can cause economic losses through mortality, morbidity and reduction in egg production. One hundred and sixty poults comprising 80 local and 80 exotic (Nicholas white) were used to examine the variations in haematological response to Salmonella spp in local and exotic turkeys inoculated with attenuated Salmonella spp. Both genotypes were reared separately on deep litter, under the same management practices and wing tagged for proper identification. At 7th week of age, 1ml of blood sample was collected from each turkey into anticoagulant tubes and labeled accordingly for base-line haematological analysis. The turkeys were inoculated at 8th week by subcutaneous injection of attenuated Salmonella vaccine at 0.5ml per turkey. On the 2nd and 7th days after inoculation, 1ml of blood samples was collected from each turkey for haematological analyses. The un-coagulated blood was used to determine packed cell volume (PCV), red blood cell (RBC), white blood cell (WBC) and its differential counts, and haemoglobin (Hb). The mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH) and mean corpuscular haemoglobin concentration (MCHC) were calculated. The haematological data collected were analyzed using General Linear Model of SAS 9.0 software. The exotic turkey had higher (p<0.05) values of PCV (38.13±1.01), Hb (12.77±0.33gd/l), MCV (133.39±0.14fL) and MCH (43.35±1.27pg/cell) before inoculation. On 2nd day post inoculation, the local turkey had higher (P<0.05) values of PCV (43.93±1.40%), RBC (3.98±0.12 106µl-1) and Hb (14.56±0.47gd/l). Also, on the seventh day post inoculation, the local turkey had higher (P<0.05) values of PCV (42.13±1.20%), WBC (11.94±0.62 103.µ-1), Hb (14.09±0.38 gd/l) and MCH (40.65±0.34pg/cell). The mean values of PCV, Hb, MCV, MCH and MCHC of local turkeys were higher (p<0.05) on the 7th day than on the 2nd day post inoculation, while the RBC was higher (P<0.05) on the 2nd day post inoculation. The WBC, MCV and MCH values were higher (p<0.05) in exotic turkey on the 2nd day post inoculation. The local turkey showed quick haematological response to Salmonella vaccine especially post inoculation. Therefore, the local turkey could be said to have stronger potential to survive under disease prevailing environment than the exotic turkey.

Antibiofilm Activity and Synergistic Effects of Thymol-Loaded Poly (Lactic-Co-Glycolic Acid) Nanoparticles with Amikacin against Four Salmonella enterica Serovars

“…On the other hand, the global human health impact of nontyphoidal Salmonella is high, with an estimated 93.8 million cases, of which an estimated 80.3 million are food-borne, and 155.000 deaths each year [ 4 ]. Salmonellosis is an important source of morbidity [ 5 ]. Their clinical picture varies from a common gastroenteric to enteric fevers, which are life-threatening, requiring prompt and correct antibiotherapy [ 6 ].…”

Variation in Body Weights and Immune Response of FUNAAB Alpha and Exotic Broiler Chickens Inoculated with Attenuated Eimeria tenella Vaccine

“…Hematological parameters have been observed as good indicators of the physiological status of the animal and their changes are important in assessing the response of such animals to various physiological situations 13 . In the current study, the results of haematological analysis showed that broilers used for the study were not affected by genotypes before inoculation with the Eimera tenella vaccine except in LYMP and MCV.…”

Variation in Body Weight and Biometric Traits of Exotic (Nicholas White) and Nigerian Locally Adapted Turkeys Reared in Humid Tropics

“…Despite the low production of turkey in Nigeria, its consumption is relatively increasing just like chicken and other animal products. However, unlike chicken, turkey production has not gained much popularity in Nigeria; its demand is majorly dependent upon its importation as frozen food [5]. The need for profound research in turkey production in Nigeria is necessitated by its valuable meat with its high rate of economic return.…”