title: Strains of infectious bronchitis virus on the Delmarva peninsula and in Arkansas.
abstract: The constant-virus variable-serum neutralization test in chicken tracheal cultures was used to serotype infectious bronchitis virus (IBV) isolants from the Delmarva peninsula and Arkansas. Of 106 isolants obtained from Delmarva in 1971-1974, 93 were found to be the JMK strain, 5 Massachusetts (Mass), 5 Connecticut (Conn), 2 a new strain designated Maryland (Md) 27, and 1 a new strain designated Md 31. Of 26 isolants obtained from Arkansas between October, 1971, and February, 1973, 17 were Arkansas (Ark) 99, 4 Mass, 1 Conn, and 1 an additional new strain, designated Ark 155. Antisera produced against 2 more isolants each neutralized both Ark 99 and Mass viruses. Antiserum against another isolant neutralized both Ark 155 and Conn viruses. The neutralizing characteristics of the new strains are described.
mesh_terms: D000818:Animals; D001131:Arkansas; D001991:Bronchitis / Q000382:microbiology / Q000662:veterinary; D002645:Chickens; D003332:Coronaviridae / Q000302:isolation & purification*; D001351:Infectious bronchitis virus / Q000276:immunology / Q000302:isolation & purification*; D008396:Maryland; D011201:Poultry Diseases / Q000382:microbiology; D014777:Virus Diseases / Q000382:microbiology / Q000662:veterinary