Histopathological effects of the fruit extract of Citrullus colocynthis on the ovary of the tick Hyalomma dromedarii.

Hyalomma dromedarii is the predominant tick species parasitizing camels in Egypt which leads to mortalities in young animals that result in economic losses. It can transmit a lot of pathogens to animals and humans, such as the Crimean-Congo hemorrhagic fever virus, the Dhori virus, Kadam virus, Theileria annulata and spotted fever rickettsia. The continuous use of chemical acaricides has negative impact on the environment and almost led to acaricidal resistance, and hence the plant extracts represent alternative methods for controlling ticks.

Acaricidal effect of Citrullus colocynthis fruit extract on the camel tick Hyalomma dromedarii (Koch, 1844).

The hard tick Hyalomma dromedarii is one of the most injurious ectoparasites affecting camels in Egypt and several other areas of the world. Hyalomma dromedarii engorged females were dipped in alcoholic extract of Citrullus colocynthis fruits at concentrations of 25, 50, 100, 200 and 400 mg/mL and then observed over four weeks following treatment. There was a marked increase in dead females following single treatment with the above concentrations, particularly for the two highest which caused ≥ 90% mortality.

Redescription of Female Laelaps nuttalli Hirst, 1915 (Acari: Dermanyssoidea: Laelapidae) with Emphasis on Its Gnathosoma, Sense Organs and Pulvilli.

The present scanning electron microscopic (SEM) study includes the redescription of female Laelaps nuttalli with emphasis on its gnathosoma and pulvilli which were rarely described in superfamily Dermanyssoidea. Chaetotaxy of dorsal shield revealed 40 pairs of setae, 22 on prosoma and 18 on opisthosoma. Epigynial plate carried 4 pairs of setae.

Efficacy of abamectin against the fowl tick, Argas (Persicargas) persicus (Oken, 1818) (Ixodoidea: Argasidae).

Abamectin, in aqueous solutions of dose rates 0.0625, 0.125, 0.

The fowl tick, Argas (Persicargas) persicus (Ixodoidea: Argasidae): description of the egg and redescription of the larva by scanning electron microscopy.

This scanning electron microscopy study revealed that the egg of Argas persicus was covered with chorion which appeared as a wrinkled layer containing regions of three textures. The first had elevated parts of slightly rough surface. The second had irregular smooth elevations; each carried numerous parallel horizontal foldings with vertical ridges.

Effect of ivermectin on the integument and dorsoventral muscles of the tick Argas (Persicargas) persicus (Oken) (Ixodoidea: Argasidae).

Light and transmission electron microscopy (TEM) revealed that integument of Argas persicus consisted of cuticle underlined with epidermal cells. Cuticle consisted of outer epicuticle and inner procuticle. Epicuticle is further subdivided into thin wax, thin electron dense cuticulin, and thick less electron dense protein epicuticle layers.

Impact of ivermectin on the ultrastructure of the testis of Argas (Persicargas) persicus (Ixodoidea: Argasidae).

Mated male Argas persicus were dissected 1 and 2 weeks after feeding on untreated and ivermectin (IVM)-treated pigeons. One week after feeding, testes of untreated ticks were filled with rounded spermatids with subplasmalemmal vesicles and cytoplasmic organelles, but lacking in treated ticks. Two weeks after feeding, testes were crowded with elongated spermatozoa supported by double-walled cisternal tubes.

Gram-negative bacteria from the camel tick Hyalomma dromedarii (Ixodidae) and the chicken tick Argas persicus (Argasidae) and their antibiotic sensitivities.

A total of nine species of gram-negative bacteria were isolated from organs and haemolymph of the hard tick Hyalomma (Hyalomma) dromedarii and the soft tick Argas (Persicargas) persicus. Four species namely Serratia liquefaciens, Stenotrophomonas maltophilia, Klebsiella ornithinolytica and Aeromonas hydrophila were isolated from H. dromedarii and five species namely Rahnella aquatilis, Pseudomonas fluorescens, Enterobacter cloacae, Chryseomonas luteola and Chryseobacterium meningosepticum were isolated from A.

Guillain-Barré syndrome in a patient with hereditary spastic paraparesis. A case report.

Objective: To report the unusual occurrence of Guillain-Barre syndrome (GBS) in a case of hereditary spastic paraparesis (HSP) and describe its effect on the preexisting clinical picture as well as the importance of early recognition and treatment.

Clinical Presentation And Intervention: A 41-year-old man known to have HSP developed an acute and rapid deterioration of muscle power associated with paresthesia in both upper and lower limbs. Clinical examination revealed flaccid quadriparesis with areflexia.