Tick Alert Group Support Incorporated


Ixodes holocyclus - engorged with eggs

All of these photographs are of one individual tick removed from the flank of a dog showing advanced signs of tick paralysis. The tick was alive - its legs moving and the body contracting. The dog was successfully treated with canine anti-tick serum. Location: Wollongong, NSW, Australia. Date: September 1999. Source: N Fischer.

This tick was easily removed by the scissor method.

Sizing photo
Dorsal view
Ventral view
Cuticle
Spiracle
Capitulum
Female with Eggs
Larvae freshly hatched from eggs

Sizing photo

the fully engorged adult female is greater than 1 cm in length

 Dorsal view

picture highlighting the spotted appearance of a local fully engorged female paralysis tick

 Ventral view

venrtal view clearly showing anal and genital grooves, as well as the anal and genital apertures

 Cuticle

The cuticle is dotted with punctations (cuticular pores) and lined with striations (cuticular folds).

here the incandescent light exposure has caused a different colour of the cuticle

 Spiracle

the spiracular plate and off-centred macula

^ This lateral photograph shows the location of the spiracular plate, and the off-centred macula. The spiracle is the respiratory organ of the tick. The tracheal trunks arise from here.

 Capitulum

Female with Eggs

Engorged tick with eggs; source: NF, 1999

^ The same engorged tick 2 weeks later, still alive (legs moving) showing eggs heaped forward. These were originally covering the anterior dorsum of the body

Engorged tick with eggs; source: NF, 1999

^ The tick turned onto its back 

Ixodes holocyclus eggs with millimeter rule; source: NF, 1999

^ Size of the eggs, each small notch represents 1 millimeter

Larvae

Ixodes holocyclus eggs with millimeter rule; source: NF, 1999

^ Larvae freshly hatched from some of the previously shown eggs. The ruler's notches are each 1 millimeter apart.