TY - JOUR
T1 - Pathogenic and immunogenic responses in turkeys following in ovo exposure to avian metapneumovirus subtype C
AU - Cha, Ra Mi
AU - Khatri, Mahesh
AU - Mutnal, Manohar
AU - Sharma, Jagdev M.
PY - 2011/3/15
Y1 - 2011/3/15
N2 - Commercial turkey eggs, free of antibodies to avian metapneumovirus subtype C (aMPV/C), were inoculated with aMPV/C at embyronation day (ED) 24. There was no detectable effect of virus inoculation on the hatchability of eggs. At 4 days post inoculation (DPI) (the day of hatch (ED 28)) and 9 DPI (5 days after hatch), virus replication was detected by quantitative RT-PCR in the turbinate, trachea and lung but not in the thymus or spleen. Mild histological lesions characterized by lymphoid cell infiltration were evident in the turbinate mucosa. Virus exposure inhibited the mitogenic response of splenocytes and thymocytes and upregulated gene expression of IFN-γ and IL-10 in the turbinate tissue. Turkeys hatching from virus-exposed eggs had aMPV/C-specific IgG in the serum and the lachrymal fluid. At 3 week of age, in ovo immunized turkeys were protected against a challenge with pathogenic aMPV/C.
AB - Commercial turkey eggs, free of antibodies to avian metapneumovirus subtype C (aMPV/C), were inoculated with aMPV/C at embyronation day (ED) 24. There was no detectable effect of virus inoculation on the hatchability of eggs. At 4 days post inoculation (DPI) (the day of hatch (ED 28)) and 9 DPI (5 days after hatch), virus replication was detected by quantitative RT-PCR in the turbinate, trachea and lung but not in the thymus or spleen. Mild histological lesions characterized by lymphoid cell infiltration were evident in the turbinate mucosa. Virus exposure inhibited the mitogenic response of splenocytes and thymocytes and upregulated gene expression of IFN-γ and IL-10 in the turbinate tissue. Turkeys hatching from virus-exposed eggs had aMPV/C-specific IgG in the serum and the lachrymal fluid. At 3 week of age, in ovo immunized turkeys were protected against a challenge with pathogenic aMPV/C.
KW - Avian metapneumovirus
KW - In ovo vaccine
KW - Turkeys
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U2 - 10.1016/j.vetimm.2010.11.006
DO - 10.1016/j.vetimm.2010.11.006
M3 - Article
C2 - 21146877
AN - SCOPUS:79961005551
SN - 0165-2427
VL - 140
SP - 30
EP - 36
JO - Veterinary Immunology and Immunopathology
JF - Veterinary Immunology and Immunopathology
IS - 1-2
ER -