Variable protection after vaccination of broiler chickens against necrotic enteritis using supernatants of different Clostridium perfringens strains.
Necrotic enteritis is an economically important disease of chickens caused by Clostridium perfringens. Immunity to necrotic enteritis is not fully characterized yet, but previous reports indicate that immunoprotective potential is present in the secreted component of C. perfringens. This study aimed to compare the vaccine potential of the supernatants of eight chicken strains of C. perfringens differing in origin, level of alpha toxin production and presence of netB gene. The supernatant of only one strain provided full protection, while one other strain provided partial protection against a severe infection challenge. Our results indicate that the protective characteristics of the supernatants are not solely based on the presence of NetB or alpha toxin.
Lanckriet
A
A
Department of Pathology, Bacteriology and Avian Diseases, Research Group Veterinary Public Health and Zoonoses, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, Merelbeke, Belgium.
Timbermont
L
L
Eeckhaut
V
V
Haesebrouck
F
F
Ducatelle
R
R
Van Immerseel
F
F
D000818:Animals; D001427:Bacterial Toxins / Q000235:genetics / Q000378:metabolism; D001428:Bacterial Vaccines / Q000276:immunology*; D002135:Calcium-Binding Proteins / Q000378:metabolism; D002645:Chickens / Q000276:immunology*; D003015:Clostridium Infections / Q000276:immunology / Q000517:prevention & control / Q000662:veterinary*; D003016:Clostridium perfringens / Q000235:genetics / Q000276:immunology; D004751:Enteritis / Q000276:immunology / Q000382:microbiology / Q000517:prevention & control / Q000662:veterinary*; D004768:Enterotoxins / Q000235:genetics; D011201:Poultry Diseases / Q000276:immunology / Q000382:microbiology / Q000517:prevention & control*; D010738:Type C Phospholipases / Q000378:metabolism
D001427:Bacterial Toxins; D001428:Bacterial Vaccines; D002135:Calcium-Binding Proteins; D004768:Enterotoxins; C534774:NetB protein, Clostridium perfringens; D010738:Type C Phospholipases; C040649:alpha toxin, Clostridium perfringens