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Table 5 Experiment 1 CONTACT. Proportion of birds becoming infected with ILTV following exposure to A20, Serva and Class 9 ILTV by eye drop inoculation, contact with inoculated birds or sharing an airspace with inoculated in the 21 days post exposure

From: Transmission of infectious laryngotracheitis virus vaccine and field strains: the role of degree of contact and transmission by whole blood, plasma and poultry dust

ILTV strains Proportion of chickens infected with ILTV (%)*
Eye drop In-contact Shared airspace Total
 A20 7/7 (100)a 7/7 (100)a 4/15 (27)bA 18/29 (62)A
 Serva 8/8 (100) 8/8 (100) 16/16 (100)B 32/32 (100)B
 Class 9 8/8 (100) 8/8 (100) 15/15 (100)B 31/31 (100)B
 Total 23/23 (100) 23/23 (100) 35/46 (76) 81/92 (88)
Factor P value
 ILTV strain  < 0.0001
 Mode of exposure 0.0019
  1. Proportion of birds becoming infected with ILTV following exposure to A20, Serva and Class 9 ILTV by eye drop inoculation, contact with inoculated birds or sharing an airspace with inoculated in the 21 dpe.
  2. *As defined in “Materials and methods” section.
  3. abDifferent lowercase superscripts indicate significant differences within rows.
  4. ABUppercase superscripts indicate a significant differences within columns for each ILTV strain. (P < 0.05).