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One-day-old broiler chicks were vaccinated with live H120 alone (group I) or in combination with CR88 (group II). The two groups were again vaccinated with CR88 at 14 days of age (doa). One group was kept as the control (group III). A significant increase in lachrymal IgA levels was observed at 4 doa and then peaked at 14 doa in the vaccinated groups. The IgA levels in group II were significantly higher than those in group I from 14 doa. Using immunohistochemistry to examine changes in the number of CD4<jats:sup>+<\/jats:sup>and CD8<jats:sup>+<\/jats:sup>cells in the trachea, it was found that overall patterns of CD8<jats:sup>+<\/jats:sup>cells were dominant compared to those of CD4<jats:sup>+<\/jats:sup>cells in the two vaccinated groups. CD8<jats:sup>+<\/jats:sup>cells were significantly higher in group II than those in group I at 21 and 28 doa. All groups were challenged oculonasally with a virulent Q1 strain at 28 doa, and their protection was assessed. The two vaccinated groups gave excellent ciliary protection against Q1, although group II's histopathology lesion scores and viral RNA loads in the trachea and kidney showed greater levels of protection than those in group I. These results suggest that greater protection is achieved from the combined vaccination of H120 and CR88 of 1-day-old chicks, followed by CR88 at 14 doa.<\/jats:p>","DOI":"10.1128\/cvi.00368-15","type":"journal-article","created":{"date-parts":[[2015,8,26]],"date-time":"2015-08-26T15:24:32Z","timestamp":1440602672000},"page":"1050-1059","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":46,"title":["Mucosal, Cellular, and Humoral Immune Responses Induced by Different Live Infectious Bronchitis Virus Vaccination Regimes and Protection Conferred against Infectious Bronchitis Virus Q1 Strain"],"prefix":"10.1128","volume":"22","author":[{"given":"Rajesh","family":"Chhabra","sequence":"first","affiliation":[{"name":"University of Liverpool, Leahurst Campus, Neston, South Wirral, United Kingdom"},{"name":"College Central Laboratory, Lala Lajpat Rai University of Veterinary &amp; Animal Sciences (LUVAS), Hisar, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anne","family":"Forrester","sequence":"additional","affiliation":[{"name":"University of Liverpool, Leahurst Campus, Neston, South Wirral, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephane","family":"Lemiere","sequence":"additional","affiliation":[{"name":"Merial S.A.S., Lyon, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Faez","family":"Awad","sequence":"additional","affiliation":[{"name":"University of Liverpool, Leahurst Campus, Neston, South Wirral, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julian","family":"Chantrey","sequence":"additional","affiliation":[{"name":"University of Liverpool, Leahurst Campus, Neston, South Wirral, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kannan","family":"Ganapathy","sequence":"additional","affiliation":[{"name":"University of Liverpool, Leahurst Campus, Neston, South Wirral, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"235","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1080\/0307945042000220697"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1136\/vr.130.22.493"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.2307\/1591298"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.4142\/jvs.2009.10.3.219"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF01309861"},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.1136\/vr.131.18.408"},{"key":"e_1_3_2_8_2","first-page":"1","article-title":"Isolation and identification of glandular stomach type IBV (QX IBV) in chickens","volume":"15","author":"Wang YD","year":"1998","unstructured":"Wang YD, Wang YL, Zhang ZC, Fan GC, Jiang YH, Liu XE, Ding J, Wang SS. 1998. 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