Queensland tick typhus is a zoonotic disease caused by the bacterium Rickettsia australis. It is transmitted by the ticks Ixodes holocyclus and Ixodes tasmani. Signs and symptoms
Queensland tick typhus is a tick-borne disease. Onset of the illness is variable; there is an incubation period of 2 to 14 days after being bitten by the infected tick. The clinical features of this illness include fever, headache, an eschar at the site of the tick bite, erythematous eruption and satellite lymphadenopathy. Queensland tick typhus symptomatically resembles Rocky Mountain spotted fever, a less severe tick-borne disease. If left untreated for longer than one to two weeks, the disease can take longer to recover from and pose a heightened risk of pneumonitis, encephalitis, septic shock, or even death. In some cases, even after the initial rash is cleared, the person may still experience prolonged lethargy or fatigue, which is common in such rickettsial infections. Causes
Queensland tick typhus is caused by the bacteria Rickettsia australis from the genus Rickettsia. Tick life cycle
The tick life cycle consists of four stages: egg, larva, nymph, and adult. An adult female tick can lay over a thousand eggs in her lifetime. Once a tick hatches from an egg, it enters the larvae stage, where it must attach to any available host and begin feeding. After it has fed, it detaches and molts, entering the larger nymph stage. In this stage it must reattach to a larger host and feed again, whereupon it detaches and molts again.
Benign lipoblastomatosis is a tumor consisting of fetal-embryonal adipocytes, frequently confused with a liposarcoma, affecting exclusively infants and young children, with approximately 90% of cases occurring before 3 years of age. : 626  The term lipoblastomatosis was first used by Vellios et al. in 1958, at which point the tumor became generally accepted as a distinctive entity. Today Diffuse lipoblastoma is the preferred term for Lipoblastomatosis. The tumor is rare, accounting for less than 1% of all childhood neoplasm, and it has been found to be more common in males than females. It often presents as an asymptomatic rapidly enlarging mass, occurring more often in the soft tissues of the extremities. See also
Myxoid lipoblastoma
List of cutaneous conditions

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