Accutest Typhi (Typhoid) (5 Tests)

Principle:
The Typhoid IgG/IgM Rapid Test is a lateral flow immunochromatographic assay. The test cassette consists of: 1) a pink-purple colored conjugate pad containing recombinant S. typhi H antigen and O antigen conjugated with colloid gold (Typhoid conjugates) and rabbit IgG-gold conjugates, 2) a nitrocellulose membrane strip containing two test region (Test line M and G) and a control region (control line). The test line ‘M’ is pre-coated with monoclonal anti-human IgM for the detection of IgM anti-S. typhi, test line
G is pre-coated with monoclonal anti-human IgG for the detection of IgG anti-S. typhi , and the C band is pre-coated with goat anti rabbit IgG. When an adequate volume of test specimen is dispensed into the sample well of the cassette, the test specimen migrates by capillary action across the test cassette. Anti-S. typhi IgM if present in the patient specimen will bind to the Typhoid conjugates. The immunocomplex is then captured on the membrane by the pre-coated anti-human IgM antibody at test region M, forming a pink-purple line at M region, indicating a S. typhi IgM positive test result.
Anti-S. typhi IgG if present in the patient specimen will bind to the Typhoid conjugates. The immunocomplex is then captured by the pre-coated reagents on the membrane, forming a pink-purple line at test region G,
indicating a S. typhi IgG positive test result. Absence of any pink-purple line at test region (M and G) suggests a negative result. The test contains an internal control (control line) which should exhibit a pink-purple line of the immunocomplex of goat anti rabbit IgG/rabbit IgG-gold conjugate regardless of the color development on any of the test region. Otherwise, the test result is invalid and the specimen must be retested with another device.