Heartwater in hosts other than domestic ruminants.
نویسندگان
چکیده
The importance of further research on the susceptibility of wild hosts to Cowdria ruminantium infection is discussed. The literature is surveyed and an attempt is made to divide the various species described into susceptible and refractory hosts. The reasons for the numerous apparently conflicting reports are considered and it is suggested that those making further inquiries in this field of work take these factors into account.
منابع مشابه
Recognition of the threat of Ehrlichia ruminantium infection in domestic and wild ruminants in the continental United States.
JAVMA, Vol 237, No. 5, September 1, 2010 D attributable to Ehrlichia ruminantium (formerly Cowdria ruminantium) infection was first described in South Africa in 1838 as a nervous condition of sheep that developed after a substantial infestation of ticks. It is an infectious but noncontagious tick-borne disease (ie, heartwater) that affects domestic and wild ruminants. Infection often causes the...
متن کاملPathogenesis of heartwater. I. Cowdria ruminantium in the lymph nodes of domestic ruminants.
DU PLESSIS, J. L. Pathogenesis of heartwater. I. C01vdria ruminantium in the lymph nodes of domestic ruminants. Onderstepoort f. vet. Res. (1970), 37 (2), 89-96. The intracellular replication of CoJPdria mminanti11111 (Cowdry, 1926) is described in reticulum cells of lymph nodes severa l days prior to the appearance of rickettsial colonies in vascular endothelial cells. This is suggestive of a ...
متن کاملA glycosylated recombinant subunit candidate vaccine consisting of Ehrlichia ruminantium major antigenic protein1 induces specific humoral and Th1 type cell responses in sheep
Heartwater, or cowdriosis, is a tick-borne disease of domestic and wild ruminants that is endemic in the Caribbean and sub-Saharan Africa. The disease is caused by an intracellular pathogen, Ehrlichia ruminantium and may be fatal within days of the onset of clinical signs with mortality rates of up to 90% in susceptible hosts. Due to the presence of competent tick vectors in North America, ther...
متن کاملThe detection of antibodies cross-reacting with Cowdria ruminantium in the sera of domestic ruminants in regions of South Africa where Amblyomma hebraeum does not occur.
High levels of seropositivity, in all probability attributable to Ehrlichia, were recorded in the serum of domestic ruminants throughout districts in South Africa where Amblyomma hebraeum, the vector of the heartwater agent, does not occur. The antibodies, detected with the indirect fluorescent antibody (IFA) and the indirect ELISA tests, cross-reacted with Cowdria ruminantium, which was used a...
متن کاملVeterinary extension on sampling techniques related to heartwater research.
Heartwater, a tick-borne disease caused by Ehrlichia ruminantium, is considered to be a significant cause of mortality amongst domestic and wild ruminants in South Africa. The main vector is Amblyomma hebraeum and although previous epidemiological studies have outlined endemic areas based on mortalities, these have been limited by diagnostic methods which relied mainly on positive brain smears....
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ورودعنوان ژورنال:
- The Onderstepoort journal of veterinary research
دوره 54 3 شماره
صفحات -
تاریخ انتشار 1987