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Ticks are parasitic bloodsuckers, capable of spreading deadly disease, and they are becoming increasingly common. Here’s what you need to know about them.
Dermacentor albipictus, the winter tick, is a species of hard tick that parasitizes many different mammal species in North America.It is commonly associated with cervid species such as elk (Cervus canadensis), white-tailed deer (Odocoileus virginianus), mule deer (O. hemionus) and caribou (Rangifer tarandus) but is primarily known as a serious pest of moose (Alces alces).
Dermacentor andersoni is a three-host tick with larval, nymphal, and adult life stages. During each life stage, the tick takes a single blood meal from a mammalian host. The duration of the lifecycle varies between 1 and 3 years and is influenced by factors such as temperature, humidity, and host availabil
Chorioptes bovis infestations are found on cattle, sheep and horses but do not cause the severe reactions associated with Psoroptes mites. Other common psoroptic mites are in the genera Chorioptes and Otodectes. Otodectes cynotis infestations in the ears of dogs are a common problem. Psoroptes ovis (arrowed) on skin, histological section
Colour and markings change markedly as engorgement progresses. It is the third tick, the moderately engorged adult female (width, at level of the spiracles, more than 4 mm) which is most commonly removed from dogs with tick envenomation. If a fully engorged tick is found on a dog, it suggests that the dog has a certain degree of immunity.
The ticks that transmit Lyme disease are hard ticks. [4] Ticks often have a preferred host, but may still attach to a different host when called for. Their preferred host may change depending on the tick's stage of development (eg larval vs adult) and the host may or may not carry the transmittable pathogen. [3]
Ixodes ricinus, the castor bean tick, is a chiefly European species of hard-bodied tick. It may reach a length of 11 mm (0.43 in) when engorged with a blood meal, and can transmit both bacterial and viral pathogens such as the causative agents of Lyme disease and tick-borne encephalitis .
Dermacentor reticulatus, also known as the ornate cow tick, ornate dog tick, meadow tick, and marsh tick, [2] is a species of tick from the family Ixodidae. It is the type species for the genus Dermacentor. [1] D. reticulatus is an ornate tick. [3] The female varies in size from 3.8–4.2 mm (unfed) to 10 mm when engorged after feeding. [4]