التفاصيل البيبلوغرافية
| العنوان: |
Evidenze di campo dell’efficacia della vaccinazione per Bronchite infettiva con ceppi Mass e QX nei confronti dell’infezione da ceppi di campo di genotipo Q1 |
| المؤلفون: |
Russo, E., Longoni, C., FRANZO, GIOVANNI, TUCCIARONE, CLAUDIA MARIA, CECCHINATO, MATTIA |
| المساهمون: |
Russo, E., Franzo, Giovanni, Tucciarone, CLAUDIA MARIA, Longoni, C., Cecchinato, Mattia |
| بيانات النشر: |
La Ducale Srl - Parma |
| سنة النشر: |
2016 |
| المجموعة: |
Padua Research Archive (IRIS - Università degli Studi di Padova) |
| مصطلحات موضوعية: |
Infectious bronchitis virus, Q1 genotype, vaccines, broiler, Italy |
| الوصف: |
Infectious bronchitis virus (IBV) is an highly contagious Avian Coronavirus, and causes respiratory symptoms and serious economic losses for the worldwide chicken industry. In Northern Italy the prevalent strain is QX, and many farms vaccinated with the association of Mass and QX strains. A monitoring program was carried out in some farms vaccinated with a Mass strain at the hatchery and Nobilis IB Primo QX spray in field at day 1. A farm with previous QX strains isolation was selected, and two consequent cycles were monitored. Tracheal and cloacal swabs were collected at 5, 8, 12, 15, 19, 23, 29, 37, 43, 50 and 57 days from 10 birds, and blood samples were collected since 15 days, every week, from 20 birds. The swabs were processed in pool and 2 real time PCR specific for the two vaccines were conducted. An test HI was performed on blood samples for the titration of antibodies against IBV QX, Mass and 793B strains, in the second cycle Q1 was added. During the first cycle the birds showed mild respiratory symptoms at day 16 for 24h, no mortality was present and no treatment was required, and around day 43 for a couple of days, with presence of swollen head syndrome and mortality. A PCR for IBV and aMPV was conducted on swabs collected at days 15, 43 and 50, and sequencing for IBV positive samples was carried out. IBV Q1 strain was detected at days 15 and 50 and aMPV was detected at day 50. During the second cycle no symptoms were detected, but the presence of two peak in serology suggested the presence of field infection and IBV field QX strain was identified at day 29 and 36. In this case the vaccination with a Mass strain associated with a QX was effective not only for the control of a IBV QX strain infection, but also against IBV Q1 strain infection. Further studies in laboratory with known challenge will be necessary to confirm this result. |
| نوع الوثيقة: |
conference object |
| وصف الملف: |
STAMPA |
| اللغة: |
Italian |
| العلاقة: |
ispartofbook:Atti della società italiana di Patologia aviare 2016; I simposio SIPA; firstpage:227; lastpage:232; numberofpages:6; http://hdl.handle.net/11577/3203256Test |
| الإتاحة: |
http://hdl.handle.net/11577/3203256Test |
| رقم الانضمام: |
edsbas.CBFE3244 |
| قاعدة البيانات: |
BASE |
