Salivary gland of the tick vector of east coast fever. IV. Cell type selectivity and host cell responses to Theileria parva

Rhipicephalus appendiculatus ticks, infected with Theileria parva, were fed on rabbits and removed at daily intervals for 9 days. Half of the ticks removed were dissected and their salivary glands processed and examined for parasites. The remaining ticks which had been removed were ground up and aliquots of the supernatant fluid thus obtained were injected into East Coast fever susceptible cattle. Cattle injected with supernatant fluids from ticks fed for 4–9 days became infected, and this could be correlated with the histological detection of mature parasites in the corresponding ticks. The most highly infective supernatant fluids were prepared from 5-day-fed ticks. In a second experiment it was shown that female ticks of a variety of weights contained infective particles of T. parva.

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Salivary gland of the tick vector (R. appendiculatus) of East Coast fever. II. Cellular basis for fluid secretion in the type III acinus

Tissue and Cell ◽

10.1016/0040-8166(81)90003-3 ◽

1981 ◽

Vol 13 (2) ◽

pp. 231-253 ◽

Cited By ~ 46

Author(s):

Don W. Fawcett ◽

Stephen Doxsey ◽

Gottfried Büscher

Keyword(s):

Salivary Gland ◽

East Coast ◽

Fluid Secretion ◽

East Coast Fever ◽

Tick Vector ◽

Cellular Basis ◽

Type Iii

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Salivary gland of the tick vector (R. appendiculatus) of East Coast fever. I. Ultrastructure of the type III acinus

Tissue and Cell ◽

10.1016/0040-8166(81)90002-1 ◽

1981 ◽

Vol 13 (2) ◽

pp. 209-230 ◽

Cited By ~ 50

Author(s):

Don W. Fawcett ◽

Stephen Doxsey ◽

Gottfried Büscher

Keyword(s):

Salivary Gland ◽

East Coast ◽

East Coast Fever ◽

Tick Vector ◽

Type Iii

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East coast fever: 60Co-irradiation of Theileria parva in its tick vector, Rhipicephalus appendiculatus

International Journal for Parasitology ◽

10.1016/0020-7519(74)90068-x ◽

1974 ◽

Vol 4 (5) ◽

pp. 507-511 ◽

Cited By ~ 8

Author(s):

R PURNELL ◽

C BROWN ◽

M BURRIDGE ◽

M CUNNINGHAM ◽

H EMU ◽

...

Keyword(s):

East Coast ◽

Rhipicephalus Appendiculatus ◽

East Coast Fever ◽

Theileria Parva ◽

Tick Vector

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Epidemiology of East Coast fever: some effects of temperature on the development of Theileria parva in the tick vector, Rhipicephalus appendiculatus

Parasitology ◽

10.1017/s0031182000050162 ◽

1981 ◽

Vol 83 (1) ◽

pp. 199-211 ◽

Cited By ~ 51

Author(s):

A. S. Young ◽

B. L. Leitch

Keyword(s):

Salivary Gland ◽

East Coast ◽

Rhipicephalus Appendiculatus ◽

The Other ◽

Theileria Parva ◽

Rate Of Development ◽

Tick Vector ◽

Laboratory Colony ◽

Moult Period ◽

Effects Of Temperature

SUMMARYThe moulting behaviour of nymphal Rhipicephalus appendiculatus from the laboratory colony and 3 field strains from Kenya was greatly influenced by constant temperatures between 18 and 37 °C but was not significantly different for the 4 tick strains. Six batches of R. appendiculatus (Muguga laboratory) nymphs which had engorged on cattle parasitaemic with 4 stocks of Theileria parva (Kiambu 4, Kiambu 5, Muguga and Mbita 4) isolated in Kenya were incubated at constant temperatures between 18 and 37 °C during their pre-moult and post-moult periods. The Theileria infections in the salivary glands of the resultant adult ticks were assessed by staining with Feulgen's stain. Two stocks (Muguga and Kiambu 5) developed their highest infections in ticks incubated at 28 °C while the other two (Kiambu 4 and Mbita 4) developed their highest infections at 23 °C. Constant temperatures of 18, 33 and 37 ° C were detrimental to the development of salivary gland infections. Temperature influenced the rate of development and numbers of the earlier Theileria stages in the ticks. Engorged nymphal ticks incubated for 4 days at 37 °C during their pre-moult period developed lower infections than ticks exposed at 4 °C for 4 days.

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Theileria parva, the Parasite of East Coast Fever in Cattle

Parasitology ◽

10.1017/s0031182000001980 ◽

1910 ◽

Vol 3 (2) ◽

pp. 117-129 ◽

Cited By ~ 2

Author(s):

George H. F. Nuttall ◽

H. B. Fantham

Keyword(s):

Peripheral Blood ◽

East Coast ◽

East Coast Fever ◽

Theileria Parva ◽

The Subject

In an earlier paper (Nuttall, Fantham and Porter, 1909, Parasitology vol II. pp. 325—340), we recorded our observations on living Theileria parva as seen in the peripheral blood of two cows which succumbed to East Coast Fever1. We now propose to describe our studies upon the parasite in stained preparations made from the animals' blood during the course of the disease and from their organs shortly after death. We shall confine our attention to the types of parasites encountered within red blood corpuscles or to corresponding types which may be occasionally encountered free in the plasma. The subject of “Koch's blue bodies” will receive attention at a later date.

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