The Hyalomma dromedarii Koch, tick is a common parasite of camels and probably the best adapted to deserts of all hard ticks. Like other. Engorged Hyalomma dromedarii females were placed for development in shade and sun (open non-shaded site) in April, August and December for two. In this study, complete nucleotide sequences of Calreticulin and Internally Transcribed Spacer Region -2 (ITS-2) encoding genes of Hyalomma dromedarii from.

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The chorion covering the egg of H. Biochemical and physiological studies of certain ticks Ixodoidea water loss from the spiracles of Hyalomma H. Oxford University Press is a department of the University of Oxford.

Hyalomma dromedarii

Tegument of posterior margin was subdivided into 9 festoons Fig. Egg surface following chorion removal was not smooth Fig. Simple conical, conical with drmoedarii expansions or irregularly shaped bumps which looked like to be externally coated with the chorion and observed between the egg shell and the chorion probably represented some sort of excreta of the developing embryo passed from the egg shell or debris passed from the outside through the chorion slits.

Eggs and larvae were washed several times using saline solution to remove debris. Anal opening was located at the beginning of the posterior one-third of the idiosomal ventral surface Fig. Sign in via your Institution Sign in. Presence of the chorion around the egg shell probably represents an extra barrier for the embryo against external pollutants.

In order to view specimens, they were first attached with double-sided carbon tape to aluminum stubs hyalommaa that they could be coated with gold in a sputter-coating apparatus JEOL JFC Scutum length from scapulae to posterior margin along median line was Absence of ovicidal effects of fenoxycarb in the tick Ixodes dammini as observed by light scanning and transmission electron microscopy.


Fixation and dehydration processes caused wrinkling in the chorion plates and disappearance of these slits Fig. The second type was numerous, slit-like and without rings or lips. A characterization of the egg capsules of Anacroneuria starki and A talamanca Plecoptera perlidae with a suggestion about the distribution of stoneflies in the tropics.

Each leg was divided into 7 hyalommma segments Fig.

Using SEM processing was applied by many workers Burkhart et al. This greatly supports the opinion of Balashov in female H. Humidity Relationships and Water Balance of Tick. The ventral plate of the hypostomal tube carried 4 rows of dromedarki directed retrograde conical denticles Fig.

Two large vertical openings were positioned anterolateral to festoons, each was observed in front of the second festoon Fig.

These specimens are referred to herein after as unprocessed. These setae were simple, short and pointed Fig.

Euhyalomma dromedarii and H.

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Hypostome appeared as a tube made up of 2 hardly sclerotized plates, one dorsolateral and the other hyalomm, connected together by a thin extensible cuticle on lateral sides Fig. Ixodidae description of the male and immature stages from rodents and insectivores and notes on its biology in South Africa. The first type only represented by 2 openings, each was located anterolateral to festoons.

Comparative description of the nymphal and larval characters of three camel and cattle ticks in Egypt. Deomedarii to cite this article: SEM processing caused partial removal of the chorion which made the egg shell clear and easily observed.

Vials were securely covered and containing small parts of filter papers to collect their wastes. Also in his thorough description of H. Ticks were identified according to Hoogstraal et al. Concerning morphological characters of the larva in the present study; 1 the basis capituli posterior margin was straight from dorsal side and curved from ventral side.


Phagocytosis of Coxiella burnetii by Hyalomma dromedarii tick haemocytes. Each leaf was made of hard cuticle and carried 1 unbranched short pointed seta. Description of the nymph and larva and redescription of the female of Ixodes neuquenensis Ringuelet Acari Ixodidae a parasite of the endangered neotropical marsupial Dromiciops gliroides thomas Microbiotheria microbiotheriidae. Width of each festoon was greater than its length except the middle one which was as long as wide Fig.

The epidemiology of tick borne crimean congo hemorrhagic fever in Asia, Europe and Africa. The egg shell was perforated particularly at poles. Body consisted of 2 major parts; the capitulum or gnathosoma and the unsegmented body or idiosoma. Biometry and scanning electron microscopic studies of acarine eggs and larvae not only provide descriptions of far greater accuracy and fidelity than achieved by traditional light microscope, but they can also be used to aid in the differentiation of the species and subspecies of a particular genus based on these stages.

Higher magnification of the ventral view showing an opening behind the coxae of the 2nd and 3rd legs arrows. Small bumps were noticed on the egg shell Fig. Mouth enclosed 2 cheliceral digits, each terminated with 3 lobes. Light Microscope LM characters of H.

Dorsal view of the capitulum. Outline of these openings was circular, oval or irregular with a diameter of 0.