syphilis/protease

Deconvolution of syphilis pathogenesis and selection of candidate syphilis vaccinogens requires detailed knowledge of the molecular architecture of the Treponema pallidum outer membrane (OM). The T. pallidum OM contains a low density of integral OM proteins, while the spirochete's many lipoprotein

Rabbits immunized with the protease resistant recombinant Treponema pallidum surface-associated Ag 4D showed an altered course of experimental syphilis after intradermal challenge with virulent T. pallidum. Vaccination trials using three different protocols were examined. In one experiment, a

Sexually transmitted disease (STD) remains a major public health challenge in developed countries, exacerbated by the advent of the HIV epidemic. The objectives of this study were to assess the prevalence of serological markers of syphilis, HIV-1/2, HTLV-I/II, HBV, and HCV infections among immigrant

An immunochip for multiple parallel detection of specific serum IgG in serological screening for syphilis is based on the use of an extended array of Treponema pallidum recombinant proteins and includes traditionally used immunodominant antigens (Tp15, Tp17, Tp47, and TmpA) and new synthetic

We evaluated the serological reactivity of a protease-resistant antigen designated 4D which was encoded by Treponema pallidum DNA and was expressed in Escherichia coli from recombinant plasmid pAW329. This 19,000-molecular-weight antigen was purified in its native, non-protease-treated form from E.

OBJECTIVE Trichomonas vaginalis (Tv) is a common sexually transmitted disease (STD) among HIV-infected populations. The relationship between Tv and immune status and HIV viral load as affected by protease inhibitor (PI) use has not been well examined. OBJECTIVE The goals were to evaluate the

A cloned Treponema pallidum antigen, designated 4D, was purified from Escherichia coli predominantly as a 190-kilodalton (kd) polypeptide, although higher oligomeric forms exist. Extensive proteolysis of 4D created a limit digestion product of 90 kd which retained antigenicity with sera from

BACKGROUND The prevalence of HIV-1 non-B variants is increasing in Spain, showing a higher number of transmitted drug resistance mutations (TDR) since 2002. This study presents the features of non-B-infected patients enrolled in the cohort of antiretroviral treatment (ART) naïve HIV-infected

BACKGROUND In resource-limited settings where antiretroviral treatment (ART) access is being scaled-up, the World Health Organization (WHO) recommends surveillance of transmitted HIV drug resistance (HIVDR). We used the WHO HIVDR threshold survey method to assess transmitted HIVDR in Dar es Salaam

Early prophylaxis after exposure to human immunodeficiency virus (HIV) can reduce the risk of HIV infection 10-fold and should be recommended or offered after all parenteral exposures. The current recommendations from the Centers for Disease Control and Prevention call for the use of two nucleoside

We assessed the correlation between HIV-RNA viral load in blood (BPVL) and seminal plasma (SPVL) in a cross-sectional cohort of 119 asymptomatic, antiretroviral-naive and experienced HIV-1 subjects (BPVL < 50 copies/mL for minimum 12 months and stable on one drug regimen). The cohort was divided

Purified flagellar protein (p41) of Borrelia burgdorferi (strain B31) was subjected to chemical cleavage with hydroxylamine or proteolysis with V8 protease, endoproteinase Asp-N, or alpha-chymotrypsin. The resulting polypeptides were identified by sodium dodecyl sulfate-polyacrylamide gel

BACKGROUND This is the first ophthalmic report--to our knowledge--of an anterior uveitis secondary to sarcoidosis in a patient infected with human immunodeficiency virus (HIV). Other reported causes of uveitis in HIV-infected patients have included HIV, herpes zoster, tuberculosis, syphilis,

The outer membrane (OM) of Treponema pallidum, the uncultivatable agent of venereal syphilis, has long been the subject of misconceptions and controversy. Decades ago, researchers postulated that T. pallidum's poor surface antigenicity is the basis for its ability to cause persistent infection, but