Inactivated recombinant Escherichia coli as a candidate vaccine against Clostridium perfringens alpha toxin in sheep.

Inactivated recombinant Escherichia coli as a candidate vaccine against Clostridium perfringens alpha toxin in sheep.
Anaerobe. 2019 Jul 09;:
Authors: Ferreira MRA, Motta JF, Azevedo ML, Dos Santos LM, Júnior CM, Rodrigues RR, Donassolo RA, Reis ADSB, Barbosa JD, Salvarani FM, Moreira ÂN, Conceição FR
Abstract
Clostridium perfringens type A is the causative agent of gas gangrene and gastroenteric ("yellow lamb disease") disease in ruminants, with C. perfringens alpha toxin (CPA) being the main virulence factor in the pathogenesis of these illnesses. In the present study, we have developed recombinant Escherichia coli bacterins expressing rCPA and used it to vaccinate rabbits and sheep. Doses of up to 200 μg of rCPA used for inoculation, induced 13,82 IU.mL-1 of neutralizing antitoxin in rabbits, which is three times higher than that recommended by the USDA (4 IU.mL-1). In sheep, recombinant bacterins induced antitoxin titers of 4 IU.mL-1, 56 days after the first dose. rCPA which was expressed, mainly, in inclusion bodies, was not found to influence the immunogenicity of the vaccine. The recombinant Escherichia coli bacterin, produced simply and safely, is capable of affording protection against diseases caused by C. perfringens CPA. The current findings represent a novel production method for CPA vaccines potentially applicable to veterinary medicine.
PMID: 31299397 [PubMed - as supplied by publisher]

Source: Anaerobe - July 8, 2019 Category: Microbiology Authors: Ferreira MRA, Motta JF, Azevedo ML, Dos Santos LM, Júnior CM, Rodrigues RR, Donassolo RA, Reis ADSB, Barbosa JD, Salvarani FM, Moreira ÂN, Conceição FR Tags: Anaerobe Source Type: research