Narrative review highlights diagnostic gaps for house dust mite allergy in tropical regions

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Frontiers in Medicine Published May 21, 2026 Medically reviewed May 21, 2026 DOI ↗ By Dr. Amelia Tan, PhD · Internal Medicine & Chronic Disease

Key Takeaway

Note that diagnostic strategies for house dust mite allergy must account for unique tropical species diversity and cross-reactivity.

This narrative review focuses on house dust mite allergy within populations residing in tropical regions. The scope of the article addresses the specific challenges presented by these environments, where local ecological factors may differ significantly from temperate zones. The authors synthesize current understanding to highlight that substantial gaps exist regarding the ecology, prevalence, and diagnostic approaches for these allergies in tropical settings. These areas remain largely unexplored in the existing literature.

The review argues that standard diagnostic strategies may not be sufficient without adaptation to local conditions. Specifically, the unique species diversity and cross-reactivity patterns found in tropical regions require tailored approaches. The authors suggest that current knowledge is insufficient to guide optimal management without further investigation into these specific environmental contexts.

The practice relevance of this review is limited to the need for region-specific research. Diagnostic strategies must account for the unique biological and environmental factors present in tropical settings. Until these gaps are addressed, clinicians should be cautious about applying generalized diagnostic criteria to these populations.

Study Details

Study typeSystematic review

EvidenceLevel 1

PublishedMay 2026

View Original Abstract ↓

House dust mite (HDM) allergy is among the leading causes of allergic disease worldwide, yet significant knowledge gaps regarding its ecology, prevalence, and diagnostic approaches in tropical regions remain unexplored. The constant warmth and humidity characteristic of the tropics create optimal conditions for mite proliferation and year-round allergen exposure, leading to high sensitisation rates among populations with allergies. This review synthesises current knowledge on the ecology, distribution, and sensitisation patterns of HDM species in tropical environments, with particular attention to Dermatophagoides pteronyssinus, Dermatophagoides farinae, and Blomia tropicalis. It also examines diagnostic approaches used across tropical countries, ranging from conventional skin prick testing (SPT), specific IgE test and to advanced molecular methods such as Component-Resolved Diagnosis (CRD). By integrating ecological and clinical perspectives, this review highlights the importance of region-specific research and diagnostic strategies that account for species diversity and cross-reactivity unique to tropical settings. Advancing molecular allergen characterisation and developing standardised tropical mite extracts will be essential for improving diagnostic accuracy, guiding immunotherapy, and informing public health policies aimed at reducing the burden of mite-related allergic diseases in tropical populations.