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Under a low magnification of 23X, this scanning electron micrograph (SEM) depicted a dorsal view of an unidentified male Dermacentor sp. tick found upon a cat in the suburbs of Decatur, Georgia, which measured approximately 3.5mm from its gnathosoma (i.e., capitulum), which is where its mouthparts are located, to the distal abdominal margin. Note that the entire dorsum of this ticks abdomen is covered by its tough scutum, or shield, categorizing it as a male, whereas, in female Ixodid-species ticks, the scutum only partially covers the dorsal abdomen. The ridges running along the distal abdominal border are known as festoons.Created: 2006
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This illustration depicts the festoons found on the abdomen of Dermacentor and Anocentor Ixodidae hard ticks.Created: 1976
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This illustration depicts a female Boophilus tick from the ventral view showing its ridged palpi, and indented fore coxae.Created: 1976
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This illustration depicts tick morphology associated with the presence of a laterally extended basis capituli.Created: 1976
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This illustration shows an Otobius soft tick from the ventral view with its reduced hypostome and granular integument.Created: 1976
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This illustration depicts the integumentary structure found on the dorsum of the Otobius and Antricola soft ticks.Created: 1976
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This illustration of a female red mite, Dermanyssus gallinae, reveals the insects ventral morphologic characteristics.Created: 1975
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This illustration depicts the ventral aspect of a female Dermanyssus gallinae mite during its deutonymph stage of development.Created: 1975
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This illustration reveals the morphologic characteristics on the dorsal surface of the female mite Dermanyssus gallinae.Created: 1975
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This photograph depicted a dorsal view of an adult female western blacklegged tick, Ixodes pacificus, which has been shown to transmit Borrelia burgdorferi, the agent of Lyme disease, and Anaplasma phagocytophilum, the agent of human granulocytic anaplasmosis (HGA), which was previously known as human granulocytic ehrlichiosis (HGE), in the western United States. The small scutum, or tough, chitinous dorsal abdominal plate, does not cover its entire abdomen, thereby allowing the abdomen to expand many times when this tick ingests its blood meal, and which identified this specimen as a female. The four pairs of jointed legs, places these ticks in the Phylum Arthropoda, and the Class Arachnida.Created: 2006
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This photograph depicted a dorsal view of an adult female western blacklegged tick, Ixodes pacificus, which has been shown to transmit Borrelia burgdorferi, the agent of Lyme disease, and Anaplasma phagocytophilum, the agent of human granulocytic anaplasmosis (HGA), which was previously known as human granulocytic ehrlichiosis (HGE), in the western United States. The small scutum, or tough, chitinous dorsal abdominal plate, does not cover its entire abdomen, thereby allowing the abdomen to expand many times when this tick ingests its blood meal, and which identified this specimen as a female. The four pairs of jointed legs, places these ticks in the Phylum Arthropoda, and the Class Arachnida.Created: 2006
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The blacklegged ticks, I. pacificus, (depicted here), and I. scapularis, are known vectors for the zoonotic spirochetal bacteria Borrelia burgdorferi, which is the pathogen responsible for causing Lyme disease. The ticks, inoculated with the bacterium when they bite infected mice, squirrels and other small animals, subsequently pass the pathogens to their human victims when they obtain a blood meal.B. burgdorferi bacteria can infect several parts of the body, producing different symptoms at different times. Not all patients with Lyme disease will have all symptoms, and many of the symptoms can occur with other diseases as well. If you believe you may have Lyme disease, it is important that you consult your health care provider for proper diagnosis.Created: 2005
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This photograph depicts a dorsal view of both a female (Lt), and male (Rt) Rocky Mountain wood tick, Dermacentor andersoni. This tick specie is a known North American vector of Rickettsia rickettsii, which is the etiologic agent of Rocky Mountain spotted fever. Note the smaller size of the females scutum compared to the males larger scutum. From the Latin word for shield, the scutum, i.e., dorsal shield, covers only a small part of the females dorsal surface, thereby, enabling her abdomen to expand, becoming engorged during feeding. The males scutum covers his entire dorsal surface, and is mottled with brown markings overall, while the females small scutum sports an almost entirely a cream-colored gray surface.Created: 2008
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This photograph depicts a dorsal view of a male Rocky Mountain wood tick, Dermacentor andersoni. This tick specie is a known North American vector of Rickettsia rickettsii, which is the etiologic agent of Rocky Mountain spotted fever.Rocky Mountain spotted fever, like all rickettsial infections, is classified as a zoonosis. Zoonoses are diseases of animals that can be transmitted to humans. Many zoonotic diseases require a biological vector (e.g., a mosquito, tick, flea, or mite) in order to be transmitted from the animal host to the human host. In the case of Rocky Mountain spotted fever, ticks are the natural hosts, serving as both reservoirs and vectors of R. rickettsii. Ticks transmit the organism to vertebrates primarily by their bite. Less commonly, infections may occur following exposure to crushed tick tissues, fluids, or tick feces.See PHIL 10869, for a side-by-side comparative view of both a male and female D. andersoni tick.Created: 2008
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This photograph depicts a dorsal view of a male Rocky Mountain wood tick, Dermacentor andersoni. This tick specie is a known North American vector of Rickettsia rickettsii, which is the etiologic agent of Rocky Mountain spotted fever.Rocky Mountain spotted fever, like all rickettsial infections, is classified as a zoonosis. Zoonoses are diseases of animals that can be transmitted to humans. Many zoonotic diseases require a biological vector (e.g., a mosquito, tick, flea, or mite) in order to be transmitted from the animal host to the human host. In the case of Rocky Mountain spotted fever, ticks are the natural hosts, serving as both reservoirs and vectors of R. rickettsii. Ticks transmit the organism to vertebrates primarily by their bite. Less commonly, infections may occur following exposure to crushed tick tissues, fluids, or tick feces.See PHIL 10869, for a side-by-side comparative view of both a male and female D. andersoni tick.Created: 2008
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This photograph depicts a dorsal view of a female Rocky Mountain wood tick, Dermacentor andersoni. This tick specie is a known North American vector of Rickettsia rickettsii, which is the etiologic agent of Rocky Mountain spotted fever.Dermacentor andersoni is found in the Rocky Mountain states and in southwestern Canada. The life cycle of this tick may require up to 2 to 3 years for completion. Adult wood ticks feed primarily on large mammals, while the larvae and nymphs feed on small rodents. See PHIL 10869, for a side-by-side comparative view of both a male and female D. andersoni tick.Created: 2008
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This photograph depicts a dorsal view of a female Rocky Mountain wood tick, Dermacentor andersoni. This tick specie is a known North American vector of Rickettsia rickettsii, which is the etiologic agent of Rocky Mountain spotted fever.Dermacentor andersoni is found in the Rocky Mountain states and in southwestern Canada. The life cycle of this tick may require up to 2 to 3 years for completion. Adult wood ticks feed primarily on large mammals, while the larvae and nymphs feed on small rodents. See PHIL 10869, for a side-by-side comparative view of both a male and female D. andersoni tick.Created: 2008
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This photograph depicts a dorsal view of both a female (Lt), and male (Rt) Rocky Mountain wood tick, Dermacentor andersoni. This tick specie is a known North American vector of Rickettsia rickettsii, which is the etiologic agent of Rocky Mountain spotted fever. Note the smaller size of the females scutum compared to the males larger scutum. From the Latin word for shield, the scutum, i.e., dorsal shield, covers only a small part of the females dorsal surface, thereby, enabling her abdomen to expand, becoming engorged during feeding. The males scutum covers his entire dorsal surface, and is mottled with brown markings overall, while the females small scutum sports an almost entirely a cream-colored gray surface.Created: 2008
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This photograph depicts a dorsal view of a male Rocky Mountain wood tick, Dermacentor andersoni. This tick specie is a known North American vector of Rickettsia rickettsii, which is the etiologic agent of Rocky Mountain spotted fever.Rocky Mountain spotted fever, like all rickettsial infections, is classified as a zoonosis. Zoonoses are diseases of animals that can be transmitted to humans. Many zoonotic diseases require a biological vector (e.g., a mosquito, tick, flea, or mite) in order to be transmitted from the animal host to the human host. In the case of Rocky Mountain spotted fever, ticks are the natural hosts, serving as both reservoirs and vectors of R. rickettsii. Ticks transmit the organism to vertebrates primarily by their bite. Less commonly, infections may occur following exposure to crushed tick tissues, fluids, or tick feces.See PHIL 10869, for a side-by-side comparative view of both a male and female D. andersoni tick.Created: 2008
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This photograph depicts a dorsal view of a female Rocky Mountain wood tick, Dermacentor andersoni. This tick specie is a known North American vector of Rickettsia rickettsii, which is the etiologic agent of Rocky Mountain spotted fever.Dermacentor andersoni is found in the Rocky Mountain states and in southwestern Canada. The life cycle of this tick may require up to 2 to 3 years for completion. Adult wood ticks feed primarily on large mammals, while the larvae and nymphs feed on small rodents. See PHIL 10869, for a side-by-side comparative view of both a male and female D. andersoni tick.Created: 2008
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This photograph depicts a dorsal view of a female Rocky Mountain wood tick, Dermacentor andersoni. This tick specie is a known North American vector of Rickettsia rickettsii, which is the etiologic agent of Rocky Mountain spotted fever.Dermacentor andersoni is found in the Rocky Mountain states and in southwestern Canada. The life cycle of this tick may require up to 2 to 3 years for completion. Adult wood ticks feed primarily on large mammals, while the larvae and nymphs feed on small rodents. See PHIL 10869, for a side-by-side comparative view of both a male and female D. andersoni tick.Created: 2008
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This photograph depicted a dorsal view of an immature, or nymphal, "lone star tick", Amblyomma americanum. Nymphal ticks are much smaller than adult ticks, and people might not notice a nymph until it has been feeding for a few days. Nymphs are, therefore, more likely than adult ticks to transmit diseases to people.Created: 2006
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This photograph depicted a dorsal view of a male "lone star tick", Amblyomma americanum.Created: 2006
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This photograph depicted a dorsal view of a male "lone star tick", Amblyomma americanum.Created: 2006