In 1879, Louis Pasteur developed the first live attenuated bacterial vaccine against fowl cholera (Pasteurella multocida). He accidentally discovered that aging bacterial cultures lost their virulence; chickens inoculated with these weakened strains became immune to subsequent exposures to fully virulent bacteria.
Who developed the first vaccine against fowl cholera?
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Question context
This question is part of 🦠 Microbiology within the broader 🧬 Medical Science subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.