Hostname: page-component-77c89778f8-n9wrp Total loading time: 0 Render date: 2024-07-17T13:15:16.397Z Has data issue: false hasContentIssue false
  • English
  • Français

Dirofilaria aethiops Webber, 1955, a filarial parasite of monkeys III. The larval development in mosquitoes

Published online by Cambridge University Press:  06 April 2009

Winfrith A. F. Webber
Winfrith A. F. Webber
Affiliation:
National Institute for Medical Research, London
Get access Rights & Permissions [Opens in a new window]

Extract

1. A description is given of the morphological development of the larval stages of Dirofilaria aethiops in the mosquito Aëdes aegypti.

2. The first-stage larvae migrate from the stomach to the connective tissue in all parts of the mosquito body, where they pass through the inactive ‘sausage’ stages. At 26° C. and 80% relative humidity the first moult takes place about the twelfth day of development and the second moult about the sixteenth day. The third-stage larvae migrate towards the proboscis where they can be found after 18–20 days.

3. The number of microfilariae ingested by the mosquito is approximately equal to the number which would be expected from the numbers in the blood of the monkey and the volume of the blood meal. The death rate of the larvae in the mosquitoes is very high for the first 2 days, but less severe later. Approximately 1% of the ingested microfilariae survive 20 days; at this time two-thirds of the surviving larvae have reached the third stage.

4. Comparison of D. aethiops with other filariae shows that first-stage larvae of different species can often be distinguished by the structure of the tail, which is the same as that of the microfilaria. Second-stage larvae are similar to each other in morphology but develop in characteristic sites in the host. Third-stage larvae differ from each other in the cephalic and caudal papillae.

Type
Research Article
Information
Parasitology , Volume 45 , Issue 3-4 , November 1955 , pp. 388 - 400
Copyright
Copyright © Cambridge University Press 1955

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

Feng, L. C. (1936). The development of Microfilaria malayi in Anopheles hyrcanus var. sinensis Wied. Chin. med. J. (Suppl. 1), pp. 345–67.Google Scholar
Hawking, F. & Webber, W. A. F. (1955). Dirofilaria aethiops Webber, 1955, a filarial parasite of monkeys: II. Maintenance in the laboratory. Parasitology, 45, 378–87.CrossRefGoogle ScholarPubMed
Rodenwaldt, E. (1933). Zur Morphologie von Microfilaria malayi. Meded. Dienst Volksgezondh. Ned.-Ind. 22, 54–60.Google Scholar
Summers, W. A. (1943). Experimental studies on the larval development of Dirofilaria immitis in certain insects. Amer. J. Hyg. 37, 173.Google Scholar
Webber, W. A. F. (1955 a). The filarial parasites of primates: a review. I. Dirofilaria and Dipetalonema. Ann. Trop. Med. Parasitol. 49, 123–41.Google Scholar
Webber, W. A. F. (1955 b). Dirofilaria aethiops Webber, 1955, a filarial parasite of monkeys: I. The morphology of the adult worms and microfilariae. Parasitology, 45, 369–77.Google Scholar