Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-19T11:25:10.030Z Has data issue: false hasContentIssue false
  • English
  • Français

Studies in Tick-borne Fever of Sheep

II. Experiments on Transmission and Distribution of the Disease

Published online by Cambridge University Press:  06 April 2009

John Macleod
John Macleod
Affiliation:
Cooper Technical Bureau, London
Get access Rights & Permissions [Opens in a new window]

Extract

(1) Female Ixodes ricinus ticks which feed on a sheep infected with tick-borne fever are not capable of transmitting the infective agent to their progeny. Only the nymphs and females, therefore, can be infective to sheep. In the case of an infective female, the infection may have been acquired, (a) in the immediately preceding stage, or (b) in the larval stage, the infective agent remaining in the tissues of the tick during the nymphal engorgement and subsequent moult. This appears to occur irrespective of whether the host on which the nymph feeds is a susceptible or an insusceptible. animal.

(2) Ticks which have acquired infection are infective as soon after moulting to the next stage as they are able to attach to hosts. Unfed ticks were not found to be infective after a period of about 14 months.

(3) Infection is transmitted to the sheep in the course of the 2nd day after attachment of infective nymphs.

(4) The disease may be transmitted to sheep by inoculation of emulsions of infective ticks, if these have been allowed to commence engorgement. The use of saline for such emulsions appears to be inadvisable.

Type
Research Article
Information
Parasitology , Volume 28 , Issue 3 , July 1936 , pp. 320 - 329
Copyright
Copyright © Cambridge University Press 1936

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Cowdry, E. V. & Danks, W. B. C. (1933). Parasitology, 25, 1.CrossRefGoogle Scholar
Du Toit, P. J. (1919). Abst. in Rev. appl. Ent. B, 8, 151.Google Scholar
Gordon, W. S., Brownlee, A., Wilson, D. R. & MacLeod, J. (1932). J. comp. Path. 45, 106.CrossRefGoogle Scholar
MacLeod, J. (1932). Parasitoloy, 24, 382.CrossRefGoogle Scholar
MacLeod, J. (1934). J. Anim. Ecol. 3, 161.CrossRefGoogle Scholar
MacLeod, J. & Gordon, W. S. (1933). Parasitology, 25, 273.CrossRefGoogle Scholar
Regendanz, P. & Reichenow, E. (1932). Zbl. Bakt. (I Orig.), 124, 471.Google Scholar
Sergent, E., Donatien, A., Parrot, L. & Lestoquard, F. (1931). Bull. Soc. Path. exot. 24, 195.Google Scholar
Stockman, S. (1918). J. comp. Path. 31, 137.CrossRefGoogle Scholar
Stockman, S. (1919). J. comp. Path. 32, 283.CrossRefGoogle Scholar
Walton, C. L. (1927). Parasitology, 19, 265.CrossRefGoogle Scholar