Aim: Toevaluate some haematological changes in Japanese quails (Coturnix coturnix japonica)
experimentally infected with Salmonella enterica serovar Gallinarum.
Methodology: A total of 160 (108 males and 52 females) Japanese quails (Coturnix coturnix
) were used in this study. The quails were obtained at the age of four weeks from the Poultry
Division of the National Veterinary Research Institute, Vom, Plateau State, Nigeria. They were
randomly selected and assigned into four groups (A, B, C and D) of forty quails each. Groups A, B
and C were infected with Salmonella enterica serovar Gallinarum per os at the dose of 106, 104 and
102, respectively, while group D served as the control. Blood with anticoagulant (ethylenediamine
tetra-acetic acid) was used for the determination of haematological parameters.
Results: There were no significant differences in haematological parameters (P > 0.05) between the
groups before infection. There were, however, significant changes (P<0.05) in haematological
parameters such asred blood cells (RBC), haemoglobin (Hb) concencentrations, packed cell volume
(PCV), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH), mean corpuscular
haemoglobin concentration (MCHC), heterophil and lymphocyte counts between the infected groups
when compared with the control group. There were also significant changes (P<0.05) in these
haematological parameters post-infection compared to before infection within each infected group.
Conclusion: This study has shown that Salmonella gallinarum causes decrease in some
haematological parameters, such as packed cell volume (10%) and red blood cell count (10%) and
haemoglobin concentration (5%) and increase in heamatological indices, such as mean corpuscular
volume (5%), mean corpuscular haemoglobin (30%), and mean corpuscular haemoglobin
concentration (30%) above control group values in Japanese quails (Coturnix coturnix japonica).
These findings could be useful in the diagnosis of subclinical cases of fowl typhoid in the Japanese
quails and other birds.

Author (s) Details

Dr.I. J. Barde
Central Diagnostic Laboratory, National Veterinary Research Institute, P.M.B. 1, Vom, Plateau State, Nigeria

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