• Persistent fatigue: low stamina or ongoing tiredness where intracellular microbes are being explored.
• Musculoskeletal discomfort: muscle or joint pain not explained by routine investigations.
• Cognitive changes: neurological or concentration difficulties linked with possible vector-borne exposure.
• Temperature shifts: recurrent low-grade fevers, night sweats or unusual temperature sensitivity.
• Exposure history: past tick, flea or animal scratches followed by unexplained symptoms.
• Vascular discomfort: tenderness along vessels or unusual skin markings.
• Lymphatic changes: swollen lymph nodes or soft-tissue sensitivity after environmental contact.
• Fluctuating patterns: symptoms that recur or vary over time without clear cause.
• Immune profiling: when T-cell responses are assessed alongside IgG/IgM antibody testing.
• Vector-borne context: exploring Bartonella exposure within wider multi-organism panels.

Overview

The Bartonella henselae - EliSpot test measures T-cell activity specific to Bartonella henselae using a highly sensitive enzyme-linked immunospot assay. This cellular method can detect very low-level T-cell reactivity, offering insight into immune responses that may not be reflected by antibody tests alone. The test is performed on a standard blood draw and focuses on the cellular arm of the immune system.

Practitioners may consider this assessment when exploring immune responses associated with suspected exposure to Bartonella henselae, particularly in situations where symptoms are persistent or recurring and where IgG/IgM results do not clearly reflect current immune activity. The EliSpot method provides additional context on T-cell reactivity, which may relate to more recent or ongoing immune engagement.

This test is commonly interpreted in conjunction with antibody testing, clinical history, symptom patterns and other vector-borne assessments. When used in combination, practitioners can build a clearer picture of cellular and humoral immune responses and how these may relate to wider health considerations for clients.

Practical

ACD/CPDA vial

This sample requires a blood draw