University of Melbourne Develops World's First Lab-Based Tick Feeding System
The University of Melbourne researchers have developed the world's first lab-based tick feeding system for bush ticks. This groundbreaking technology significantly reduces the requirement for animal experiments in tick studies, promoting ethical and reproducible research.
Background on Ticks and Disease Transmission
Ticks are significant carriers of infectious diseases globally, transmitting various viruses, bacteria, and protozoa to both animals and humans. Global changes in climate, land-use patterns, and trade are influencing the distribution of ticks and the diseases they carry.
Key Research Details
The research was led by Dr. Abdul Ghafar and Professor Abdul Jabbar from the Melbourne Veterinary School, alongside Professor Ard Nijhof from Freie Universität Berlin, Germany. Their findings were published in The Veterinary Journal.
Revolutionizing Tick Studies: Platform Capabilities
The study demonstrated that the developed platform can facilitate the feeding and complete reproduction of the Asian longhorned tick (Haemaphysalis longicornis) without the use of animal hosts.
In Australia, the Asian longhorned tick is widespread and contributes to economic impact. It is the primary transmitter of Theileria orientalis, which causes production losses in cattle. Evidence also suggests that bites from H. longicornis may contribute to alpha-gal syndrome in humans, an allergy to red meat.
Overcoming Traditional Research Limitations
Professor Nijhof noted that traditional tick research relies on live animals, which presents challenges including being labor-intensive, costly, ethically complex, and subject to variability from host immune responses and behavior.
Professor Jabbar explained that the new laboratory platform eliminates the need for animal hosts. The system utilizes a thin silicone membrane and cattle blood, with the clotting protein fibrin removed, to replicate natural feeding conditions.
Advantages of the Innovative System
This platform allows for controlled studies on tick physiology, microbiome dynamics, pathogen acquisition, transmission, and the high-throughput screening of new pesticides and anti-tick vaccines under standardized laboratory conditions.
Dr. Ghafar stated that the research team optimized membrane thickness and feeding conditions to address the anatomical limitations of H. longicornis, such as short mouthparts and limited mobility, which previously hindered reliable artificial feeding.
Dr. Ghafar also indicated that this host-free feeding system can support integrated research on disease-carrying animals of importance to animal and human health, particularly as climate change, land-use change, and global trade continue to alter the distribution of ticks and tick-borne diseases in Australia.