Damon Mcknight
Ticks are small parasitic arachnids that attach themselves to animals and humans and feed on their blood. There are about 70 different types of ticks in Australia, with the most common species being Ixodes holocyclus, also known as the Australian paralysis tick or simply paralysis tick. This species carries a potentially lethal toxin for dogs and is found all along the eastern coast of Australia, mainly in coastal areas but also further inland. The bush tick, which feeds predominantly on cattle, is found on both the east and west coasts, while the brown dog tick is common throughout the country. Ticks are most prevalent during the warmer summer months, and can be found in grass, on tree branches, logs, leafy debris, and other areas of uncontrolled vegetation.
| Characteristics | Values |
|---|---|
| Number of Tick Types in Australia | 70 |
| Location | Coastal eastern Australia, from near Cooktown in Queensland to Lakes Entrance in Victoria |
| Inland Locations | Bunya Mountains of Queensland and the Lower Blue Mountains of New South Wales |
| Tick-Prone Areas | Grass, tree branches, logs, leafy debris, and uncontrolled vegetation |
| Tick-Borne Diseases | Lyme disease, Ehrlichia canis, Rickettsia bacteria, and mammalian meat allergy |
| Symptoms | Paralysis, skin irritation, red and slightly raised bite marks, flu-like symptoms, fever, skin rash, muscular or joint pain |
| Tick Appearance | Dark brown first and last pairs of legs, beige middle pairs of legs |
| Tick Life Stages | Eggs, larvae, nymphs, and adults |
| Tick Larvae Legs | Six |
| Tick Nymphs and Adults Legs | Eight |
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What You'll Learn
Ixodes holocyclus, also known as the Australian paralysis tick
The Australian paralysis tick has a flattened, seed-shaped body, with the larvae possessing six legs, while the nymphs and adults have eight legs, typical of arachnids. The life cycle of Ixodes holocyclus consists of four stages: egg, larva, nymph, and adult. It is a "three-host tick," requiring three hosts to complete its life cycle. The larvae search for a blood meal, feed for several days, then drop from the host to moult into nymphs. Nymphs require another blood meal before moulting into adults. Female adults then feed for an extended period before laying up to 3,000 eggs.
To find a host, Ixodes holocyclus ticks climb onto vegetation and wave their forelegs slowly until they come into contact with a potential host. They can be found in grass, on tree branches, logs, leafy debris, and uncontrolled vegetation. Ticks prefer to feed on protected, soft skin areas, anchoring themselves with hooks in their mouths and feeding on blood.
The Australian paralysis tick can cause systemic paralysis in humans, although this is now rare due to increased awareness and better diagnostics. However, it poses a more significant threat to pets, especially dogs, where paralysis and even death can occur. The toxin produced by the tick is responsible for the paralysis, and early removal and veterinary care are crucial for the best chances of recovery.
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Ticks found on dogs
Australia is home to about 70 different types of ticks, and they are most prevalent during the warmer months of summer. Ticks can carry poisonous toxins and bacteria that are harmful to dogs, so it is important to know how to prevent and remove them. Ticks are small eight-legged parasitic arachnids that attach and feed on the blood of various animals and humans. They can be found in grass, on tree branches, logs, leafy debris, and uncontrolled vegetation. When a suitable host passes by, they drop onto them and find an optimal spot to feed, typically in protected, soft skin areas.
The paralysis tick (Ixodes holocyclus) is one of the most common species of ticks in Australia and is considered the most dangerous for dogs. It carries a potentially lethal toxin and is found all along the eastern coast of Australia, from Queensland to Victoria. It can also be found further inland, particularly in areas of moist escarpments and ranges. The paralysis tick is identified by its dark brown first and last pairs of legs, in contrast to its beige middle pairs. It can cause tick paralysis in dogs, which can be fatal even with the best treatment. Signs of paralysis include weakness in the hind legs that may progress to the front legs, an unsteady staggering walk, a dry cough, or a change in the animal's bark. If you notice any of these signs, seek immediate veterinary help.
The Australian bush tick is another common species found along the east and west coasts of Australia, particularly in coastal New South Wales, eastern Victoria, and Queensland. They are known to feed predominantly on cattle, but they can also infest dogs and other animals. Bush ticks have short mouth parts and tiny spurs on their heads, and their body colour ranges from reddish-brown to blue-black depending on their level of engorgement. While they are not as dangerous as paralysis ticks, they can still cause skin irritation and transmit diseases. In dogs, they can cause a parasitic red blood cell infection called babeosis, which can result in anaemia and a lack of oxygen in the blood.
The brown dog tick is a third common species found all over Australia. They transmit bacteria that cause the potentially fatal brown dog tick disease, erhlichia canis. Heavy infestations of brown dog ticks can result in excessive blood loss and anaemia. They are identified by their reddish-brown colour and eyes, and they have short mouthparts. Brown dog ticks prefer to live on dogs and are rarely found on other animals. They are well-adapted to temperate climates and have lower moisture requirements than other ticks.
To prevent ticks on your dog, you can use a tick or flea treatment, tick collars, shampoos, and rinses. You should also check your dog daily for ticks, feeling for small lumps in hidden places such as under the collar, between the toes, in the paws, gumline, and inside the ears. If you find a tick, it is best to remove it as quickly as possible using tweezers or a tick removal system. Once removed, monitor your dog closely for any signs of illness or paralysis, and seek veterinary help if needed.
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Ticks found on cattle
Ticks are small eight-legged parasitic arachnids that attach and feed on the blood of various animals and humans. There are about 70 different types of ticks in Australia. The most economically important tick affecting livestock in Australia is the cattle tick (Rhipicephalus australis, previously known as Boophilus microplus). Cattle ticks are found widely in northern Australia, particularly in the northern parts of Western Australia, the Northern Territory, the eastern and northern regions of Queensland, and into northern New South Wales. They are also found in endemic regions of Queensland, the Northern Territory, and Western Australia.
Cattle ticks are a vector (carrier) for tick fever, a disease caused by the blood parasites Anaplasma marginale, Babesia bovis, and Babesia bigemina. They can also transmit the blood parasite Theileria (Theileria orientalis) in cattle. Infestation with cattle ticks usually occurs in late spring and summer, but they lay viable eggs all year round in northern Queensland. The parasitic stage of their life cycle takes approximately 21 days, during which time the tick changes from a minute larva to a nymph and finally an adult. Female adults feed for about a week before engorging and dropping off the host to lay up to 3,000 eggs and then die.
Cattle ticks are most often spread when they are attached to a host animal. They are single-host ticks, meaning the larval, nymph, and adult stages develop and feed on the same host. They can also survive on other animals such as sheep, goats, and horses. Small animals (calves, sheep, goats, and dogs) are more vulnerable than fully grown cattle. Cattle ticks can be controlled to varying degrees using tick-resistant cattle, treatments with chemicals, pasture spelling, or combinations of these methods.
The paralysis tick (Ixodes holocyclus) is another species of tick found on cattle in Australia. It occurs in the coastal areas of eastern Australia and is identified by its dark brown first and last pairs of legs, in contrast to its beige middle pairs. It secretes a toxin in its saliva that can cause paralysis, especially in young animals.
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Ticks found in coastal eastern Australia
Ticks are small parasitic arachnids that attach themselves to various animals and humans and feed on their blood. There are about 70 different types of ticks in Australia, and they are especially common along the east coast.
Ixodes holocyclus, commonly known as the Australian paralysis tick, is one of about 75 species in the Australian tick fauna and is considered the most medically important. It is usually found in a 20-kilometre-wide band following the eastern coastline of Australia, from Cooktown in far north Queensland to Lakes Entrance in Victoria. It is the tick most frequently encountered by humans and their pets. It can cause paralysis by injecting neurotoxins into its host. The natural hosts for the paralysis tick include koalas, bandicoots, possums and kangaroos.
The paralysis tick is identified by its dark brown first and last pairs of legs, in contrast to its beige middle pairs. It carries a potentially lethal toxin for dogs and can cause tick paralysis in them. It may be easy to find on short-haired animals but difficult on long-haired ones. It is important to inspect pets daily if they are allowed outdoors in tick-prone areas and to check them for signs of paralysis.
The Australian government does not support the diagnosis of locally acquired Lyme disease, but it does recognise Debilitating Symptom Complexes Attributed to Ticks (DSCATT). DSCATT is used to describe symptoms of ongoing illness linked to a tick bite, including mammalian meat allergy.
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Tick-borne illnesses
Ticks are small parasitic arachnids that feed on the blood of animals and humans. They can carry poisonous toxins and bacteria that cause illnesses in both humans and animals. The exact incidence of tick-borne diseases in Australia is unknown, but they are known to be harmful to dogs and can cause paralysis and even death.
Ixodes holocyclus, commonly known as the Australian paralysis tick or simply paralysis tick, is one of the three common species of ticks in Australia. It is found mainly along the coastal eastern regions, from far north Queensland to Victoria, and in certain areas, it is found more than 100 km inland. This tick species can cause paralysis in humans and animals, with the toxin produced by the tick being responsible for the paralysis. The first confirmed human death in Australia due to tick envenomation was reported in 1912, where a large, engorged tick caused flaccid paralysis in a child, leading to asphyxiation.
The brown dog tick, identified by its reddish-brown colour and eyes, is common throughout Australia. While it usually causes harmless skin irritation, it can transmit bacteria that cause Ehrlichia canis, a potentially fatal disease. Heavy infestations of brown dog ticks can result in excessive blood loss and anaemia.
The Australian bush tick is another species that can be fatal to dogs. It transmits a parasitic red blood cell infection called babeosis, which leads to anaemia and a lack of oxygen in the blood.
In addition to these, ticks in Australia have been associated with various illnesses in humans, including Rickettsial infections (such as Flinders Island Spotted Fever caused by Rickettsia honei), Q fever, allergic reactions, mammalian meat allergy, and in rare cases, systemic paralysis. While Lyme disease is not considered locally acquired in Australia, travellers returning from endemic regions may bring the disease, and Australian healthcare providers can diagnose and treat it effectively.
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Frequently asked questions
Ticks are found all along the east and west coasts of Australia, and in places more than 100 km inland.
Ticks like to hang out in grass, on tree branches, logs, leafy debris, and uncontrolled vegetation.
Ticks are small eight-legged parasitic arachnids. The paralysis tick, for example, has a dark brown first and last pair of legs, in contrast to its beige middle pairs.
If the tick is still attached to the skin, it will appear as a small lump protruding from the skin. If the tick is no longer attached, the bite site may be red and slightly raised.
If you are allergic to tick bites, you should always carry an adrenaline autoinjector. If you notice any signs of illness occurring within a few weeks of a tick bite (e.g. flu-like symptoms, fever, skin rash, or muscular/joint pain), consult a doctor immediately and inform them about the tick bite.
