Babesiosis, a tick-borne illness caused by Babesia parasites, is commonly diagnosed using serological testing, where the B. duncani IFA (Indirect Fluorescent Antibody) IgM test plays a crucial role. This test specifically detects IgM antibodies against B. duncani, a Babesia species predominantly found in the western United States. IgM antibodies are among the first antibodies produced by the immune system when it encounters a pathogen. The presence of these antibodies is indicative of a recent or acute infection.

The Bartonella henselae antibody (IgG) screen is a serological test used to detect the presence of IgG antibodies against Bartonella henselae, the bacterium responsible for Cat Scratch Disease (CSD).

This screening test is essential in the diagnostic workup of patients presenting with symptoms suggestive of CSD, such as prolonged fever, lymphadenopathy, and in some cases, more severe complications like bacillary angiomatosis or neuroretinitis. The IgG antibodies typically develop a few weeks after the initial infection and can persist in the body for a long time, potentially indicating either a past or an ongoing infection.

Bartonella henselae antibody (IgG) testing is a critical diagnostic tool for identifying past or chronic infection with Bartonella henselae, the bacterium primarily responsible for causing Cat Scratch Disease (CSD).

This test measures the level of immunoglobulin G (IgG) antibodies specific to B. henselae in a patient's blood.

IgG antibodies against this pathogen typically develop several weeks after the initial infection and can persist in the body for a long period, sometimes even for years.

Bartonella henselae antibody (IgM) testing plays a crucial role in the serological diagnosis of acute infections caused by Bartonella henselae, the bacterium responsible for Cat Scratch Disease (CSD) and other associated conditions. IgM antibodies are the first type of antibodies produced by the immune system in response to an infection. In the context of B. henselae exposure, the detection of IgM antibodies is particularly significant as it often indicates a recent or ongoing infection. The IgM response typically develops within a few days to weeks following the initial exposure to the pathogen and can provide early diagnostic clues before the appearance of IgG antibodies.