Abstract

Swine pasteurellosis is usually observed in descript as well as nondescript pigs imparting in huge economic losses to the pig producers. The disease is characterized by pyrexia, dullness, staggering gait, anorexia, serous nasal discharge and dyspnoea. Case fatality rate may as high as 95% in adult animals and 100% in piglets. Typical lesions of oedematous swellings may remarkably visible in the pharyngeal region, these swellings spread to the ventral cervical region and brisket of pigs. Gross lesions include severe pneumonia and haemorrhages in lungs, petechial haemorrhages on serous membranes and other visceral organs. Lymph nodes usually get enlarged, oedematous and haemorrhagic. The blood smears from heart blood and tissue impression smears reveal teaming numbers of bipolar organisms indicating the presence of Pasteurella spp., the etiological organism. The bacteriological isolation and characterization of causative agent should be ruled out to identify by Gram’ staining for purity and bipolar morphology and biochemical characterization of the organisms. Molecular characterization necessitates to confirm Pasteurella multocida along with capsular types of the organism. Histopathological examination of lungs usually reveals typical fibrinous bronchopneumonia, multifocal suppuration and pleural thickening. Heart of some pigs may show presence of thrombi, haemorrhages and necrosed myocardium.

Highlights

  • Pasteurella multocida is of substantial economic significance in the livestock industry [1]

  • Pasteurellosis is an infection of cattle, buffalo, swine and other species of animals caused by Gram-negative coccobacillary bipolar organism, Pasteurella multocida

  • Swine Pasteurellosis is an acute infection in swine caused by members of the Pasteurella multocida

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Summary

Introduction

Pasteurella multocida is of substantial economic significance in the livestock industry [1]. Pasteurellosis is an infection of cattle, buffalo, swine and other species of animals caused by Gram-negative coccobacillary bipolar organism, Pasteurella multocida. It is OIE list B disease of ruminants in the tropical countries. Pasteurella multocida, a part of the commensal flora in the upper respiratory tract of pigs is shown to appear intermittently in the nasopharynx and subsequently shed in nasal secretions [8] During this period, the carrier animal act to become a source of infection for in-contact susceptible animals. Pasteurella multocida is an important pathogen of pigs It causes pneumonic pasteurellosis and is characterized by pneumonia, purulent bronchopneumonia and pleurisy.

Epidemiology
Genotypic Chracterization of Pasteurella multocida
Gross pathological lesions
Histopathological lesions
Conclusions

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