The Tswana is also known to have resistance to the endemic heartwater disease
, as do Landim cattle (South African sanga) from Mozambique (Asselbergs et al., 1993).
These tick-borne diseases include, but are not limited to, heartwater disease
(Ehrlichia ruminantium) transmitted by Amblyomma hebraeum (bont tick); red water disease (Babesia bigemina) transmitted by Rhipicephalus (Boophilus) decoloratus (blue tick); and East coast fever (Theileria parva parva) and corridor disease (Theileria parva lawrencei) transmitted by Rhipicephalus appendiculatus (brown ear tick).
causes an acute high lever, loss of appetite, and respiratory distress.
The tick is a pest of economic and pathogenic concern since it readily infests cattle (Semtner & Hair 1973), and is the vector of Cowdria ruminantium Cowdry (the causative agent of Heartwater disease
) (Uilenburg 1982) and Rickettsia parkeri (the causative agent of newly described spotted fever) (Paddock et al.
* Heartwater Disease
: Heartwater is a disease of cattle, sheep, and goats, and can cause mortality rates of 60% in cattle and up to 100% in sheep.
ruminantium (causes heartwater disease
in ruminants), Ana.
Isolation and transmission of Cowdria ruminantium (causal agent of heartwater disease
) in Blue Nile Province, Sudan.
It is claimed that African tortoises harbour a deadly tick that can infect cattle, sheep and deer with the killer heartwater disease
The southern African bont tick, which produces a deadly malady in cattle known as heartwater disease
, prefers animals tested out by its peers, according to a study conducted in Zimbabwe and reported in the Jan.
Ticks carry many diseases that threaten livestock and human health, including heartwater disease
, Lyme disease, and babesiosis.
Multigene families of MSP2 paralogs have been found in Cowdria ruminatium (34), the cause of heartwater disease
of ruminants in Africa and Caribbean, and Ehrlichia granulocytophila, the agent of human granulocytic ehrlichiosis (35).