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Fig. 4 | BMC Veterinary Research

Fig. 4

From: Serological response and protection level evaluation in chickens exposed to grains coated with I2 Newcastle disease virus for effective oral vaccination of village chickens

Fig. 4

Kaplan-Meier survival analysis of chickens vaccinated by NDI2 via different grain carriers as assessed before and after ND virus challenge by virulent strain at age of day 129. Morbidity was started on day 3 and severe mortality prevailed up to 14 days post challenge during 30 days of follow up. Vaccination using any type of vaccine carrier grain had an impact better than the naïve for survival rate of the chickens. However, different vaccine carrier grains had different survival rates in the range of 35.7 - 100% whilst 20% in naïve. The survival rate was significantly different among the treatment groups (Log-rank = 77.3498, D.F. = 14, p < 0.0000). For example, oral vaccination using water, parboiled barley and cracked maize induced 100% survival until end of the experimental period i.e. week 21

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BMC Veterinary Research

ISSN: 1746-6148

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