2024(1)      January - March, 2024

Investigation of patho-bacteriological, serum bio-hematological, oxidative stress and antioxidant biomarkers due to pneumonic pasteurellosis caused by Pasteurella multocida in cattle

Fayyaz Ahmad1, Muhammad Shahid Mahmood1*, Riaz Hussain2*, Sajjad Ur Rahman1, Rao Zahid Abbas3

1Institute of Microbiology, University of Agriculture, Faisalabad, Pakistan

2Department of Pathology, Faculty of Veterinary and Animal Sciences, Islamia University of Bahawalpur, Pakistan

3Department of Parasitology, Faculty of Veterinary Sciences, University of Agriculture, Faisalabad, Pakistan


Hemorrhagic septicemia (HS) caused by Pasteurella multocida (P. multocida) is one of the leading causes of bovine respiratory problems in dairy animals. Therefore, identification of reliable and useful biomarkers of naturally occurring HS disease is of vital important for early diagnosis and monitoring of efficacy of treatment. Therefore, the current study was conducted to estimate the status of hematology, serum biochemistry, oxidative stress and antioxidant enzymes in dairy cattle (52) in and around district Bahawalpur. Deep nasal swabs and jugular blood was collected from normal and morbid animals showing signs of respiratory distress for molecular characterization of P. multocida. Different visceral tissues were obtained from animals died of respiratory signs for histopathological investigations. Results revealed significantly (P < 0.05) increased quantity of oxidative stress biomarkers while different antioxidant enzymes decreased significantly in erythrocyte of infected animals. Results on hematology revealed significantly increased total leukocyte counts and neutrophil counts while significantly decreased hemoglobin, hematocrit, monocyte, lymphocyte and erythrocyte counts. Results on serum biomarkers showed significantly (P < 0.05) increased quantity of different serum profile in P. multocida positive cattle. Grossly, lungs were congested, hyperemic and consolidated. Frothy exudate was observed in trachea of P. multocida infected cattle. Results on microscopic observation showed different pathological lesions in lungs, liver, heart and kidneys of P. multocida confirmed cases. Based on the results of our study, it can be suggested that continuous monitoring of disease is necessary to lower the prevalence of infectious agent. It is also suggested that blood biochemistry, oxidative stress and antioxidant oxidant enzymes are useful and reliable tools to clarify the pathogenesis of disease for proper therapeutics.

Keywords: Hemorrhagic septicemia (HS), Pasteurella multocida, Hemato-biochemistry, Oxidative stress, Antioxidant enzyme, Histopathology

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