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Figure 4 | Veterinary Research

Figure 4

From: Oral immunization with a novel attenuated Salmonella Gallinarum encoding infectious bronchitis virus spike protein induces protective immune responses against fowl typhoid and infectious bronchitis in chickens

Figure 4

Photomicrographs of hematoxylin-and eosin-stained lung sections of chickens on 6th day post-IBV challenge. Chickens (N = 15) were immunized with sterile PBS, JOL2068 or JOL2077, and 28 days later all the vaccinated chickens were challenged with 104 EID50 IBV. At 6th day post-challenge, chickens (n = 10) were sacrificed and trachea, lung, kidneys and bursal tissues were collected for histological analysis. Black arrows represent inflammatory lesions.

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