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TICK TYPHUS

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The Rickettsial disease known as Tick Typhus occurs in widely separated regions, such as Siberia, India, East Africa, Australia and America. Different species of Rickettsia and other bacterial genera may be involved in different regions. The disease is also known under different names depending on the region. Service (2008) observed that the ticks (e.g., Amblyomma americanum) are usually believed to be the principal reservoirs of infection, although rodents and other mammals may at times serve as reservoirs. He also noted that both tansovarial and transstadial transmission may occur.

Some of the more important kinds of Tick Typhus are Rocky Mountain Spotted Fever, Mediterranean Spotted Fever, African Tick-bite Fever, Siberian Tick Typhus, Queensland Tick Typhus and Oriental Tick Typhus. Other unnamed types exist.

LIFE CYCLE-Tick Typhus

Key References: <medvet.ref.htm> <Hexapoda>

Camicas, J. L., J. . Hervy, F. Adam & P. C. Morel. 1998. The ticks of the world (Acarida, Ixodida): Nomenclature, Described Stages, Hosts,

Distribution. Paris: Editions de l'ORSTOM..

Gammons, M. & G. Salam. 2002. Tick removal. Amer. Fam. Physician 66: 643-45.

Gothe, R., K. Kunze & H. Hoogstraal. 1979. The mechanisms of pathogenicity in the tick paralyses. J. Med. Ent. 16: 357-69.

Hoogstraal, H. 1966. Ticks in relation to human diseases caused by viruses. Ann. Rev. Ent. 11: 261-308.

Hoogstraal, H. 1967. Ticks in relation to human diseases caused by Rickettsia species. Ann. Rev. Ent. 12: 377-420.

Legner, E. F. 1995. Biological control of Diptera of medical and veterinary importance. J. Vector Ecology 20(1): 59_120.

Legner, E. F. 2000. Biological control of aquatic Diptera. p. 847_870. Contributions to a Manual of Palaearctic Diptera,

Vol. 1, Science Herald, Budapest. 978 p.

Matheson, R. 1950. Medical Entomology. Comstock Publ. Co, Inc. 610 p.

Needham, G. R. & P. D. Teel. 1991. Off-host physiological ecology of ixodid ticks. Ann. Rev. Ent. 36: 313-52.

Parola, P. & D. Raoult. 2001. Tick-borne typhuses. IN: The Encyclopedia of arthropod-transmitted Infections of Man and Domesticated

Animals. ed. M. W. Service, Wallingford: CABI: pp. 516-24.

Service, M. 2008. Medical Entomology For Students. Cambridge Univ. Press. 289 p

Sonenshine, D. E., R. S. Lane & W. L. Nicholson. 2002. Ticks (Ixodida). IN: Medical & Veterinary Entomology, ed. G. Mullen & L. Durden,

Ambsterdam Acad. Press. pp 517-58.

Sonenshine, D. E. & T. N. Mather (eds.) 1994. Ecological Dynamics of Tick-Borne Zoonoses. Oxford Univ. Press, New York.