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Hyalomma lusitanicum is a species of large, hard-bodied tick belonging to the family Ixodidae, characterized by its distinctive banded legs, dark shield (scutum), and aggressive hunting behavior. Unlike most common ticks that passively wait for a host to brush past vegetation, this species actively pursues its prey. It tracks hosts by detecting body heat and carbon dioxide emissions from afar.Historically concentrated in the southwestern regions of the Iberian Peninsula, Hyalomma lusitanicum has experienced rapid geographic expansion across southern Europe. This surge is heavily driven by rising global temperatures and growing wild host populations.
Key Characteristics & Anatomy
Visual Identifiers: Large size relative to other ticks, notable distinct striped or banded legs, visible eyes (the genus name translates to "glass eyes"), and a rigid, dark scutum.
Active Hunting: Moves quickly across the ground directly toward humans or animals once it registers a target.
Preferred Hosts: Primarily feeds on large and medium wild mammals like wild boars and rabbits, though it readily feeds on cattle, horses, deer, and humans.
Geographical Distribution & Recent ExpansionWhile native to dry and warm environments across North Africa, Asia, and Southern Europe, the species has drawn significant public health attention due to its northern push.
Spain and Portugal: Main distribution remains the southwest Iberian Peninsula, but studies reveal significant colonization further north and east. For example, the tick has rapidly spread throughout Catalonia (infesting scores of municipalities across Barcelona and Tarragona).
Encroachment into Cities: It has moved past rural shrublands into suburban zones, urban public parks, school courtyards, and gardens.
Public Health Risks & Pathogens
Hyalomma lusitanicum serves as a highly efficient vector for several severe zoonotic diseases affecting both humans and livestock:Crimean-Congo Hemorrhagic Fever (CCHF): This is the primary human threat. The tick acts as a reservoir and vector for the CCHF virus, which causes a severe illness marked by high fever, muscle pain, and internal bleeding, yielding a high mortality rate.
Bacterial Infections: Capable of transmitting Coxiella burnetii (the causative agent of Q-fever) and specific Rickettsia bacterial strains.
