Latex agglutination assays are employed for the detection of Coccidioides, the fungus responsible for causing coccidioidomycosis, commonly known as Valley fever. Similar to the tests for Cryptococcus and Histoplasma, latex agglutination assays for Coccidioides use latex beads coated with specific antibodies against Coccidioides antigens.

The latex agglutination test for Coccidioides is performed by mixing the patient's sample (usually serum) with latex beads coated with antibodies that specifically recognize Coccidioides antigens. If the antigens are present in the sample, they will bind to the antibodies on the latex beads, resulting in visible agglutination or clumping.

The degree of agglutination observed can be visually assessed or quantitatively measured. A positive result indicates the presence of Coccidioides antigen in the patient's sample, suggesting an active coccidioidomycosis infection.

Latex agglutination assays for Coccidioides offer several advantages, including rapid results, ease of use, and good sensitivity and specificity. These tests are commonly used as screening tools for coccidioidomycosis, especially in individuals with compatible symptoms and who reside in or have traveled to regions where Coccidioides is endemic.