HBV and HCV chronic infection was determined in cases and in referents by serologic markers [HBV surface antigen (HbsAg) and anti-HCV antibodies].
The high immunofluorescence assay titer to Cp. psittaci is consistent with an infection with Cp. abortus because both species are closely related and share most surface proteins (11 ), making a serologic distinction between both pathogens virtually impossible.
Influenza A viruses are divided into subtypes according to the serologic reactivity of the surface glycoproteins hemagglutinin (H1 H16) and neuraminidase (N1 N9).
The serologic markers tested were, hepatitis B surface antigen (HBsAg), Hepatitis B surface antibody (anti-HBs) and total hepatitis B core antibody (total anti-HBc).
Serologic tests for hepatitis B surface antigen and hepatitis C antibody were negative.
Serologic detection of the hepatitis B virus surface antigen was indicative of hepatitis B infection.
Commercial enzyme immunoassay kits (Huakang Biotech, Shenzhen; Kehua Bio-Engineering, Shanghai, China) were used for qualitative testing of HBV serologic markers, including HBsAg, antibody against hepatitis B surface antigen (anti-HBs), and antibody against hepatitis B core antigen (anti-HBc).
For many decades, GAS strains have been classified based on serologic differences in M protein, a highly polymorphic cell-surface virulence factor [14], [15].
Recently, recombinant antigens of P. jirovecii have been developed that show promise as reagents for serologic studies: Kexin 1, which is encoded by a single gene; the major surface glycoprotein (Msg), which is encoded by multiple genes and is capable of antigenic variation [20] [21].
The serologic status of chronic viral hepatitis was evaluated by assays for hepatitis B surface antigen (HBsAg)/antibody (HBsAb) and anti-hepatitis C virus antibody (anti-HCV).
