Serological methods are most reliable when a fourfold-rise in antibody titre is looked for.

Another factor that needs to be considered is the fate of the antibody titres once their formation has been triggered by one or more of H pylori antigens.

It may also be possible to extend the diagnostic discrimination using cytokeratin subtype classification, neuroendocrine status, or serological antibody titres.

Campylobacter infection can be confirmed by rising antibody titres, culture on a selective medium or histological examination.

Antistreptococcal antibody titres - GPnotebook.co.uk.

It's not a virus, because antibody titres don't go up, and white-cell differentials don't change.

Definitive diagnosis can only be achieved by measuring a fourfold rise in antibody titre over the course of the disease.

Neutralising antibody titres against poliovirus types 1, 2, and 3 were measured with a modified microneutralisation assay.

Also, 10-15% of normal individuals can have high level anti-TPO antibody titres.

Serological tests may show high antibody titre against the causative antigen.