Quantitative studies on the bactericidal actions of serum and complement. II. Some implications for the mechanism of the bactericidal reaction.

Evaluation of Pasteurella multocida serotype B:2 resistance to immune serum and complement system

Members of gram-negative bacteria family Pasteurellaceae, include a large number of important economically human and veterinary pathogens. Organisms belonging to the family can colonize in mucosal surfaces of the respiratory, alimentary, genital tracts and cause diseases in various mammals, birds, and reptiles. Hemorrhagic septicemia is an acute disease of cattle and buffaloes in tropi...

Quantitative studies on the bactericidal actions of serum and complement. I. A rapid photometric growth assay for bactericidal activity.

IgG bearing covalently bound C3b has enhanced bactericidal activity for Escherichia coli 0111

The mechanism was sought by which bactericidal IgG for E. coli 0111 (strain 12015) increases the bactericidal efficiency of C5b-9. IgG did not affect the distribution of C3 deposition on the O-Ag capsule and the outer membrane of 12015, suggesting that bactericidal IgG was not directing complement activation to different sites on the bacterial surface. However, one-fifth of the C3 that was depo...

Effects of dietary Aloe vera on some specific and nonspecific immunity in the common carp (Cyprinus carpio)

In this study, the immunostimulatory effect of dietary Aloe vera crude extract was investigated in Cyprinus carpio. Three hundred fish were randomly divided into four groups. The first group was immunized with Aeromonas hydrophila bacterin (A.h) and was fed a diet contained 0.5% Aloe vera. The second group was immunized with A.h and fed a diet without Aloe vera. The third group was not immunize...

Effects of dietary Aloe vera and Echinacea on some nonspecific immunity in shirbot (Barbus grypus)

A feeding trial was conducted for sixty continuous days to determine the effect of dietary Aloe vera and Echinacea  on immunological parameters of Shirbot (Barbus grypus) Four hundred and twenty fish weighing 50-60 g were randomly subjected to to seven different treatment, including one control  (Aloe vera and Echinacea free diet), A1 (0.1% of Aloe vera, A2 (0.2% of Aloe vera &nb...