Typhoid IgG positive with IgM negative usually indicates past infection or prior vaccination rather than an active acute infection. IgM appears early in recent disease; IgG rises later and can persist, showing past exposure or developed immunity. Interpretation depends on symptoms, timing and other tests (blood culture or repeat serology). If you have fever or concerns, consult your clinician for further testing and advice.

IgG and IgM antibody tests detect immune responses to a specific pathogen. IgM appears early after infection and suggests recent or active infection; IgG develops later and indicates past infection or longer-term immunity (or vaccine response). These tests help distinguish acute versus prior exposure, assess immune status, and support public-health tracking. Results must be interpreted with timing, symptoms, and other tests, since antibodies may take days to weeks to appear.

The TORCH test is a blood panel in pregnancy that screens for infections harmful to the fetus: Toxoplasma, Other (syphilis, varicella, parvovirus), Rubella, Cytomegalovirus, and Herpes simplex. It detects IgM (recent) and IgG (past/immunity) antibodies to assess risk of congenital infection and guide monitoring or treatment. It's usually done early in pregnancy or when fetal issues are suspected, and results require clinical interpretation.

Positive HSV IgM suggests a recent or primary herpes infection (or sometimes a false‑positive/non‑specific result), while positive HSV IgG indicates past exposure and long‑term antibodies. If both are positive, it often reflects recent infection or reactivation. Because IgM can be unreliable, clinicians may use repeat serology or direct tests (PCR/culture) plus clinical assessment to confirm timing and guide management.

If both IgG and IgM are negative, it may mean you haven't been exposed or vaccinated, the test was done too early before antibodies formed, or your immune system isn't mounting a detectable response; false negatives are also possible. If you have symptoms or recent exposure, get a diagnostic PCR and repeat antibody testing after 1–3 weeks. Discuss results and next steps (including vaccination) with a healthcare provider and continue precautions.

IgG positive for typhoid usually means past exposure or vaccination and suggests immunity rather than active infection. IgM or blood culture/PCR are needed to diagnose acute disease. IgG can persist for months to years and sometimes cross‑react, causing false positives. If you have fever or other symptoms, see a doctor for assessment and appropriate tests and treatment; otherwise no immediate antibiotics are required.