| ehrlichia ewingii infection in white-tailed deer (odocoileus virginianus). | two closely related zoonotic ehrlichiae, ehrlichia chaffeensis and e. ewingii, are transmitted by amblyomma americanum, the lone star tick. because white-tailed deer (odocoileus virginianus) are critical hosts for all mobile stages of a. americanum and are important vertebrate reservoirs of e. chaffeensis, we investigated whether deer may be infected with e. ewingii, a cause of granulocytotropic ehrlichiosis in humans and dogs. to test for e. ewingii infection, we used polymerase chain reaction ... | 2002 | 12095432 |
| the pcs20 pcr assay for ehrlichia ruminantium does not cross-react with the novel deer ehrlichial agent found in white-tailed deer in the united states of america. | white-tailed deer are susceptible to heartwater (ehrlichia [cowdria] ruminantium infection) and are likely to suffer high mortality if the disease spreads to the united states. it is vital, therefore, to validate a highly specific and sensitive detection method for e. ruminantium infection that can be reliably used in testing white-tailed deer, which are reservoirs of antigenically or genetically related agents such as ehrlichia chaffeensis, anaplasma (ehrlichia) phagocytophilum (hge agent) and ... | 2004 | 15373331 |
| molecular and serologic evidence of tick-borne ehrlichiae in three species of lemurs from st. catherines island, georgia, usa. | in recent years, several species of ehrlichiae have been recognized as tick-borne disease agents of veterinary and medical importance. clinically normal free-ranging or previously free-ranging lemurs, including 46 ring-tailed lemurs (lemur catta), six blue-eyed black lemurs (eulemur macaco flavifrons), and four black and white ruffed lemurs (varecia variegata variegata) from st. catherines island, georgia, were tested for evidence of exposure to tick-borne ehrlichiae. all 52 adult lemurs were se ... | 2004 | 15732591 |
| transmission of bacterial agents from lone star ticks to white-tailed deer. | amblyomma americanum (l.), the lone star tick, is an aggressive ixodid tick that has been implicated as a vector for several bacteria. among these bacteria are the disease agents ehrlichia chaffeensis and ehrlichia ewingii, and the putative disease agent "borrelia lonestari." the hypothesis in this study was that wild lone star ticks from northeastern georgia are capable of transmitting all three agents to white-tailed deer, odocoileus virginianus, a known reservoir host for e. chaffeensis. in t ... | 2007 | 17547234 |
| natural and experimental infection of white-tailed deer (odocoileus virginianus) from the united states with an ehrlichia sp. closely related to ehrlichia ruminantium. | an ehrlichia sp. (panola mountain [pm] ehrlichia sp.) closely related to ehrlichia ruminantium was recently detected in a domestic goat experimentally infested with lone star ticks (lsts, amblyomma americanum) collected from georgia, usa. the infected goat exhibited pyrexia and mild clinical pathologic abnormalities consistent with ehrlichiosis. at least two other ehrlichia species (ehrlichia chaffeensis and ehrlichia ewingii) are maintained in nature by a cycle involving lsts as the primary vec ... | 2008 | 18436670 |
| detection of bacterial agents in amblyomma americanum (acari: ixodidae) from georgia, usa, and the use of a multiplex assay to differentiate ehrlichia chaffeensis and ehrlichia ewingii. | amblyomma americanum, the lone star tick, is the most common and most aggressive human biting tick in the southeastern united states. it is known to transmit the agents of human ehrlichioses, ehrlichia chaffeensis and ehrlichia ewingii. in addition, it carries agents of unspecified pathogenicity to humans, including rickettsia amblyommii, borrelia lonestari, and the newly emerging panola mountain ehrlichia (pme). surveillance of these ticks for recognized or emerging pathogens is necessary for a ... | 2014 | 25118421 |