BSIP RM batch 12 September 2013
EN_01107858_0075
This photograph depicts a dorsal view of a female Gulf Coast tick, Amblyomma maculatum. This tick specie is a known vector for Rickettsial organisms, Rickettsia parkeri, and Ehrlichia ruminantium, formerly Cowdria ruminantium. R. parkeri is a member of the spotted fever group of rickettsial diseases affecting humans, while E. ruminantium causes ?heartwater disease?, an infectious, noncontagious, tick-borne disease of domestic and wild ruminants, including cattle, sheep, goats, antelope, and buffalo. Note the considerably-smaller scutum, or ?shield? covering only a small region of its dorsal abdomen, unlike its male counterpart, an example of which can be seen in PHIL 10876, 10877, and 10878, which sports a scutum covering its entire dorsal abdomen. The smaller scutum in the female enables its abdomen to expand considerably, leading to an engorged appearance after ingesting its host blood meal. Ticks possess four pairs of legs, placing it in the class of Arachnida, as its cousins, the spiders and scorpions.
2013-08-19
CDC / BSIP/EAST NEWS
BSIP
CDC / BSIP
Bsip_013586_004
0,54MB
19cm x 13cm przy 300dpi
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