Prevalence of Ehrlichia ewingii in Amblyomma americanum in North Carolina
Ticks as vectors of Ehrlichia parasites have been the subject of study in North Carolina since 1993. Recently, Ehrlichia ewingii, which causes canine granulocytic ehrlichiosis, was documented as causing human illness in Missouri. Previously, the Lone Star tick, Amblyomma americanum, was confirmed as...
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| Published in | Journal of clinical microbiology Vol. 38; no. 7; p. 2795 |
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| Main Authors | , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
American Society for Microbiology
01.07.2000
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| Online Access | Get full text |
| ISSN | 0095-1137 1098-660X |
| DOI | 10.1128/JCM.38.7.2795-2795.2000 |
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| Abstract | Ticks as vectors of Ehrlichia parasites have been the subject of study in North Carolina since 1993. Recently, Ehrlichia ewingii, which causes canine granulocytic ehrlichiosis, was documented as causing human illness in Missouri. Previously, the Lone Star tick, Amblyomma americanum, was confirmed as the vector of this parasite in dogs. Accordingly, in 1999, we focused our efforts on determining the presence and infection rate of E. ewingii in A. americanum. Infection rates for E. ewingii were low in adult A. americanum ticks, 0.4% (1 of 245) in females and 0.9% (2 of 217) in males, and a pool-positive rate of 4.7% (5 of 106) was obtained when 1,308 nymphs in 106 pools were tested for E. ewingii. However, a minimum field infection rate for the nymphs was 0.4% (5 of 1,308 ticks). |
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| AbstractList | Ticks as vectors of Ehrlichia parasites have been the subject of study in North Carolina since 1993. Recently, Ehrlichia ewingii, which causes canine granulocytic ehrlichiosis, was documented as causing human illness in Missouri. Previously, the Lone Star tick, Amblyomma americanum, was confirmed as the vector of this parasite in dogs. Accordingly, in 1999, we focused our efforts on determining the presence and infection rate of E. ewingii in A. americanum. Infection rates for E. ewingii were low in adult A. americanum ticks, 0.4% (1 of 245) in females and 0.9% (2 of 217) in males, and a pool-positive rate of 4.7% (5 of 106) was obtained when 1,308 nymphs in 106 pools were tested for E. ewingii. However, a minimum field infection rate for the nymphs was 0.4% (5 of 1,308 ticks). |
| Author | Harrison, Bruce Anderson, Alice McPherson, Todd Engber, Barry Wolf, Leslie Whitt, Parker |
| AuthorAffiliation | State Laboratory of Public Health N. C. Department of Health and Human Services Raleigh, NC 27611 Public Health Pest Management Section N. C. Department of Environment and Natural Resources Raleigh, NC 27611 |
| AuthorAffiliation_xml | – name: State Laboratory of Public Health N. C. Department of Health and Human Services Raleigh, NC 27611 – name: Public Health Pest Management Section N. C. Department of Environment and Natural Resources Raleigh, NC 27611 |
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| Cites_doi | 10.1016/S0304-4017(98)00179-4 10.1099/00207713-42-2-299 10.2460/ajvr.1990.51.06.929 10.1056/NEJM199907153410303 10.1128/JCM.37.10.3323-3327.1999 10.1128/JCM.36.4.1090-1095.1998 10.1086/314954 10.1111/j.1939-1676.1998.tb02096.x 10.3201/eid0505.990504 |
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| References | e_1_3_1_8_2 Anziani O. S. (e_1_3_1_3_2) 1990; 51 e_1_3_1_7_2 e_1_3_1_9_2 e_1_3_1_10_2 e_1_3_1_4_2 e_1_3_1_6_2 e_1_3_1_5_2 e_1_3_1_2_2 10511519 - Emerg Infect Dis. 1999 Sep-Oct;5(5):635-42 9831955 - Vet Parasitol. 1998 Nov 27;79(4):325-39 10488199 - J Clin Microbiol. 1999 Oct;37(10):3323-7 9542943 - J Clin Microbiol. 1998 Apr;36(4):1090-5 1581189 - Int J Syst Bacteriol. 1992 Apr;42(2):299-302 10438390 - J Infect Dis. 1999 Sep;180(3):900-3 10403852 - N Engl J Med. 1999 Jul 15;341(3):148-55 9560760 - J Vet Intern Med. 1998 Mar-Apr;12(2):61-70 2368951 - Am J Vet Res. 1990 Jun;51(6):929-31 |
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| SubjectTerms | Amblyomma americanum analysis Animals Arachnid Vectors Arachnid Vectors - microbiology disease vectors DNA, Bacterial DNA, Bacterial - analysis Ehrlichia Ehrlichia - isolation & purification Ehrlichia ewingii Female isolation & purification Ixodidae Letters to the Editor Male microbiology North Carolina Nymph Nymph - microbiology Polymerase Chain Reaction Ticks Ticks - microbiology USA, North Carolina |
| Title | Prevalence of Ehrlichia ewingii in Amblyomma americanum in North Carolina |
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