How do I know my Widal test positive?

The Widal test is positive if TO antigen titer is more than 1:160 in an active infection, or if TH antigen titer is more than 1:160 in past infection or in immunized persons. A single Widal test is of little clinical relevance especially in endemic areas such as Indian subcontinent, Africa and South-east Asia.

How is Widal test reported?

Normally the result of Widal test should be reported as either of ‘agglutination’ or ‘no agglutination’ and if agglutination is present, in titers (1:20, 1:40…) rather than in reactive or non reactive terms.

What is O and H in Widal test?

The traditional Widal test measures antibodies against flagellar (H) and somatic (O) antigens of the causative organism. In acute infection, O antibody appears first, rising progressively, later falling and often disappearing within a few months.

What does S typhi O 1 160 mean?

Just see the O antigen titer if it is 1:160, indicating Enteric fever. If the O antigen is 1:80, repeat the test after 5 to 7 days, and now if the titer is 1:160, the rising titer again indicates acute infection.

What is Paratyphi BH?

Paratyphoid fever, also known simply as paratyphoid, is a bacterial infection caused by one of the three types of Salmonella enterica. Symptoms usually begin 6–30 days after exposure and are the same as those of typhoid fever.

What is typhoid O and H?

S typhi O positive means active infection of typhoid fever. Active infection indicates the patient has an infection of Salmonella enterica serovar typhi. S typhi H positive means there is a past infection or it shows the result of the immunized person’s serum test report.

What is the high range of typhoid?

Typhoid fever and paratyphoid fever have similar symptoms̵. People usually have a sustained fever (one that doesn’t come and go) that can be as high as 103–104°F (39–40°C). Some people with typhoid fever or paratyphoid fever develop a rash of flat, rose-colored spots.