+ Translate
+ Most Popular
Cunninghamia lanceolata plantations in China
Mammalian lairs in paleo ecological studies and palynology
Studies on technological possibilities in utilization of anhydrous milk fat for production of recombined butter-like products
Should right-sided fibroelastomas be operated upon?
Large esophageal lipoma
Apoptosis in the mammalian thymus during normal histogenesis and under various in vitro and in vivo experimental conditions
Poissons characoides nouveaux ou non signales de l'Ilha do Bananal, Bresil
Desensitizing efficacy of Colgate Sensitive Maximum Strength and Fresh Mint Sensodyne dentifrices
Administration of fluid by subcutaneous infusion: revival of a forgotten method
Tundra mosquito control - an impossible dream?
Schizophrenia for primary care providers: how to contribute to the care of a vulnerable patient population
Geochemical pattern analysis; method of describing the Southeastern limestone regional aquifer system
Incidence of low birth weights in a hospital of Mexico City
Graded management intensity of grassland systems for enhancing floristic diversity
Microbiology and biochemistry of cheese and fermented milk
The ember tetra: a new pygmy characid tetra from the Rio das Mortes, Brazil, Hyphessobrycon amandae sp. n. (Pisces, Characoidei)
Risk factors of contrast-induced nephropathy in patients after coronary artery intervention
Renovation of onsite domestic wastewater in a poorly drained soil
Observations of the propagation velocity and formation mechanism of burst fractures caused by gunshot
Systolic blood pressure in a population of infants in the first year of life: the Brompton study
Haematological studies in rats fed with metanil yellow
Studies on pasteurellosis. I. A new species of Pasteurella encountered in chronic fowl cholera
Dormancy breaking and germination of Acacia salicina Lindl. seeds
therapy of lupus nephritis. a two-year prospective study

Demonstration of vertical transmission of Cowdria ruminantium, the causative agent of heartwater, from cows to their calves

Demonstration of vertical transmission of Cowdria ruminantium, the causative agent of heartwater, from cows to their calves

Veterinary Parasitology 61(1-2): 119-132

ISSN/ISBN: 0304-4017

PMID: 8750689

DOI: 10.1016/0304-4017(95)00819-5

One of the most important questions about the epidemiology of heartwater in the field is how Cowdria ruminatium is transmitted within vertebrate host populations. In this study vertical transmission of C. ruminantium from cows to their calves was demonstrated. Twelve mixed-breed calves, born to dams living in a heartwater-endemic area of Zimbabwe, were tested post-natally for the presence of C. ruminantium. Vertical transmission was demonstrated to occur under natural field conditions using tests in which uninfected laboratory-reared Amblyomma ticks were fed on neonatal calves and subsequently either fed on, or inoculated into, susceptible small ruminants or tested by a polymerase chain reaction (PCR) assay. Prior to natural Amblyomma tick infestation, C. ruminantium infection in 5 of the 12 calves was confirmed by tick transmission to small ruminants and 11 of the 12 calves tested positive based on PCR analysis of ticks fed on them. The role of colostral cells, as one mode of infection, was demonstrated by the transmission of C. ruminantium to three out of five goats inoculated intravenously with viable colostral cells collected from dams living in a heartwater-endemic area. The significance of vertical transmission is presented in relation to the epidemiology and control of heartwater.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 045723722

Download citation: RISBibTeXText

Related references

Growth of Cowdria ruminantium, the causative agent of heartwater, in a tick cell line. Journal of Clinical Microbiology 38(3): 1238-1240, 2000

Isolation of the causative agent of heartwater (Cowdria ruminantium) from three Amblyomma species in eight Districts of Kenya. Veterinary Record 140(1): 13-16, 1997

Isolation and transmission of Cowdria ruminantium (causal agent of heartwater disease) in Blue Nile Province, Sudan. Veterinary Research Communications 8(2): 141-145, 1984

Heartwater. The artificial transmission of Cowdria ruminantium in domestic ruminants and mice. Onderstepoort Journal of Veterinary Research 54(3): 277-279, 1987

Predicting the effect of vaccination on the transmission dynamics of heartwater (Cowdria ruminantium infection). Proceedings of the 9th Symposium of the International Society for Veterinary Epidemiology and Economics, Breckenridge, Colorado, USA, August 6-11-2000: Id 209, 2000

Predicting the effect of vaccination on the transmission dynamics of heartwater (Cowdria ruminantium infection). Preventive Veterinary Medicine 42(1): 17-38, 1999

The relationship between tick (Amblyomma hebraeum) infestation and immunity to heartwater (Cowdria ruminantium infection) in calves in Zimbabwe. Veterinary Parasitology 58(4): 335-352, 1995

The role of males of the bont tick (Amblyomma hebraeum) in the transmission of Cowdria ruminantium (heartwater). Veterinary Parasitology 34(1-2): 15-23, 1989

Abortion in a heifer associated with the intra-uterine transmission of Cowdria ruminantium-like organisms following heartwater vaccination. Journal of the South African Veterinary Association 67(3): 158-160, 1996

Investigating the epidemiology of heartwater (Cowdria ruminantium infection) by means of a transmission dynamics model. Parasitology 117: 49-61, 1998

Improved culture conditions for Cowdria ruminantium (Rickettsiales), the agent of heartwater disease of domestic ruminants. Cytotechnology 4(3): 285-290, 1990

DNA vaccination with map1 gene followed by protein boost augments protection against challenge with Cowdria ruminantium, the agent of heartwater. Vaccine 20(7-8): 1215-1225, 2002

Immunisation of cattle against heartwater by infection with Cowdria ruminantium elicits T lymphocytes that recognise major antigenic proteins 1 and 2 of the agent. Veterinary immunology and immunopathology 85(1-2): 23-32, 2002

Competence of the African Tortoise Tick, Amblyomma marmoreum (Acari: Ixodidae), as a Vector of the Agent of Heartwater (Cowdria ruminantium). The Journal of Parasitology 86(3): 438-441, 2000

Competence of the African tortoise tick, Amblyomma marmoreum (Acari: Ixodidae), as a vector of the agent of heartwater (Cowdria ruminantium). Journal of Parasitology 86(3): 438-441, 2000