LPM 221: Commercial Poultry Production and Hatchery Management (1+1)

INTRODUCTION

• The process of planned exposure to a disease agent at the correct time with the correct agent for producing immunity is called as vaccination.
• In most instances vaccines are used to produce ad mild infection, with few or no signs of the disease, by using a specific disease agent.
• The virulence of vaccine and the number of vaccine or virus particles per individual dose will determine the effectiveness of a vaccination.
• The immune competence of the chicken and host factors such as stress, genetic background, and other concurrent diseases also play an important role in the outcome of a particular vaccination.