Nephropathogenesis of chickens experimentally infected with various strains of infectious bronchitis virus.
Four-day-old specific-pathogen-free chickens were inoculated by eyedrop with four different strains (Gray, JMK, CV56b, and Wolgemuth) of infectious bronchitis virus (IBV). Birds were monitored clinically and euthanatized at 1, 4, 7, and 14 days postinfection and tissues were collected for virus isolation, histopathologic examination, in situ hybridization (ISH), and immunohistochemistry (IHC). Clinical disease was severe in chickens infected with Wolgemuth, but no overt disease was observed with the other strains. Virus was isolated from the kidneys of chickens infected with the Gray-, CV56b-, and Wolgemuth-strains of IBV. Histologically, interstitial nephritis was evident in chickens infected with these same 3 strains. However, viral nucleic acid and antigen were detected only with Wolgemuth-infected kidneys by ISH and IHC. These results indicate that the pathological changes in kidneys from chickens infected with Gray and CV56b may not have resulted from the cytolytic action of the virus.
Department of Avian Medicine, College of Veterinary Medicine, The University of Georgia, Athens 30602, USA.
Chang-Won
CW
Lee
Corrie
C
Brown
Deborah A
DA
Hilt
Mark W
MW
Jackwood
D000818:Animals; D002060:Bursa of Fabricius; D002645:Chickens / Q000821:virology*; D018352:Coronavirus Infections / Q000473:pathology / Q000662:veterinary* / Q000821:virology; D004195:Disease Models, Animal; D015151:Immunoblotting / Q000662:veterinary; D007150:Immunohistochemistry / Q000662:veterinary; D017403:In Situ Hybridization / Q000662:veterinary; D001351:Infectious bronchitis virus / Q000302:isolation & purification / Q000472:pathogenicity*; D007668:Kidney / Q000473:pathology / Q000821:virology; D009395:Nephritis, Interstitial / Q000473:pathology / Q000662:veterinary* / Q000821:virology; D011201:Poultry Diseases / Q000473:pathology / Q000821:virology*; D015347:RNA Probes; D013047:Specific Pathogen-Free Organisms
D015347:RNA Probes