What is the default range of salmonella typhi H and salmonella typhi O?

The default range for Salmonella typhi H (flagellar antigens) and O (somatic antigens) typically refers to the dilution ranges used in serological testing to detect specific antibodies in a patient's serum. Generally, the H antigen is tested at dilutions ranging from 1:40 to 1:320, while the O antigen is tested at dilutions that can vary but often starts around 1:20. These ranges can be adjusted based on specific laboratory protocols or patient conditions. However, it's important to consult specific laboratory guidelines for precise testing parameters.