Ehrlichia ruminantium (formerly Cowdria ruminantium). Order Rickettsiales, Family Anaplasmataceae. • Small, Gram negative, pleomorphic coccus, and obligate. caused by the ehrlichial rickettsia Ehrlichia ruminantium (formerly Cowdria ruminantium), heartwater is transmitted from reservoir wildlife hosts (e.g., wildebeest). E. ruminantium is best demonstrated in fixed sections stained with Giemsa. It resembles a Gram-negative coccus, the colour varying from lilac purple.

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It is frequently dowdria. Since this sample originated from a goat, we believe that it might be Anaplasma oviswhich has been reported to occur in sheep and goats in Mozambique 2. The development of a restocking decision support aid for Mozambique. Antibodies to Cowdria ruminantium in Mozambican goats and cattle detected by immunofluorescence using endothelial cell culture antigen.

The tick-borne rickettsia Cowdria ruminantium has a Chlamydia-like developmental cycle. OIE Handistatus, ; Molia et al. The map1 gene of Cowdria ruminantium is a member of a multigene family containing ruminajtium conserved and variable genes. Molecular detection of Ehrlichia ruminantium infection in Amblyomma variegatum ticks in The Gambia.

Physical examination may reveal petechiae of the mucous membranestachycardia and muffled heart sounds.


The force of infection based on the age seroprevalence profile was estimated at 18 per cattle year-risk. By using this site, you agree to the Terms of Use and Privacy Policy. Journal of Animal Science Some authors differentiate elementary, intermediate and reticulated bodies Prozesky et al. Heartwater infection cowdriosis in a Sitatunga Tragelaphus spekei in Nigeria. Biochemical and Biophysiological Rruminantium Communications, 2: Annals of the New York Academy of Sciences They most often occur in clumps rukinantium 1 or 2 to several thousand in a vacuole in the cytoplasm of endothelial cells.

International Journal of Systematic and Evolutionary Microbiology, Onderstepoort Journal of Veterinary Research, 58 4: With permission of the editor. In Mozambique heartwater has been reported to occur throughout the country and mainly during the rainy season 3 Tetracyclines can also be used prophylactically when animals are introduced into an area endemic with cowdriosis.

Pulmonary oedema and mucosal congestion are regularly seen along with frothy fluid in the airways and cut surfaces of coqdria lungs. Title Adult female Vector.

Ehrlichia ruminantium

Arrow, translocation of sentinel goats. Jongejan F, Thielemans M J Identification of an immunodominant antigenically conserved kilodalton protein from Cowdria ruminantium. Ehrlichia ruminantium Dumler, Note on the use of the white mouse for the transport of strains of heartwater.

It was first identified in sheep in South Africa in the s, and had reached the Caribbean by After a day quarantine period at the Veterinary Faculty in Maputo, the goats were subdivided into two sentinel herds and placed at two farms south of Maputo Porto Henrique and Bom Pastor and were herded together with the local free-ranging goats.


Journal of Wildlife Diseases Multivariate logistic regression modelling was used to identify risk factors associated with seropositivity.

Ehrlichia ruminantium – Wikipedia

Despite the fact that sheep seroconverted after treatment, no C. Title Adult male Vector Caption Amblyomma hebraeum: Epi-info Centres for Disease Control, version 6.

Brain smear from a goat. In The Netherlands three seronegative Texelaar sheep were subinoculated with 4 ml of blood no. The entire 16S sequences of three samples were determined elsewhere Baseclear, Leiden, The Netherlands. Author information Article notes Copyright and License information Disclaimer.

Distribution Table Top of page The distribution in this summary table is based on all the information available. Point seroprevalence survey cowdrix Ehrlichia ruminantium infection in small ruminants in the Gambia. Rickettsial and chlamydial diseases of domestic animals. Department of Agriculture;