Prevalence and risk factors associated with gastrointestinal parasites of pet dogs in North-Central Algeria.

The prevalence and risk factors associated with gastrointestinal parasites in dogs were conducted in Blida, North-Central Algeria. The study was carried out over 131 clinically healthy dogs, from March to June 2019, by coprological methods. Of the 131 collected dogs, 61.07% (n = 80) were found infected by gastrointestinal parasites. Sixty-four dogs were carriers of a single infection with the following parasites Ancylostoma spp (15.27%), Uncinaria spp (14.50%) Toxocara canis (4.58%), Trichuris vulpis (3.82%), Toxascaris leonina (2.29%), Taenia/Echinococcus spp. (2.29%), Mesocestoides spp (0.76%), Cystoisospora spp. (3.05%) and Neospora caninum-like (2.29%). Sixteen dogs harbored mixed infection. Male (OR = 1.18) German shepherds' dogs were more infected (OR = 1.08) by helminthic parasites (OR = 13.64). The frequency of single infections (OR = 6.86) increased with the animal's age (OR = 1.73-3.46). Identifying hookworms, T. canis, and T. vulpis suggests a continuing risk of contamination of pet dogs as a source of human infection with the zoonotic parasites in Blida.

Range expansion of the Bluetongue vector, Culicoides imicola, in continental France likely due to rare wind-transport events.

The role of the northward expansion of Culicoides imicola Kieffer in recent and unprecedented outbreaks of Culicoides-borne arboviruses in southern Europe has been a significant point of contention. We combined entomological surveys, movement simulations of air-borne particles, and population genetics to reconstruct the chain of events that led to a newly colonized French area nestled at the northern foot of the Pyrenees. Simulating the movement of air-borne particles evidenced frequent wind-transport events allowing, within at most 36 hours, the immigration of midges from north-eastern Spain and Balearic Islands, and, as rare events, their immigration from Corsica. Completing the puzzle, population genetic analyses discriminated Corsica as the origin of the new population and identified two successive colonization events within west-Mediterranean basin. Our findings are of considerable importance when trying to understand the invasion of new territories by expanding species.

Estimation of canine Leishmania infection prevalence in six cities of the Algerian littoral zone using a Bayesian approach.

A large-scale study on canine Leishmania infection (CanL) was conducted in six localities along a west-east transect in the Algerian littoral zone (Tlemcen, Mostaganem, Tipaza, Boumerdes, Bejaia, Jijel) and covering two sampling periods. In total 2,184 dogs were tested with an indirect fluorescent antibody test (IFAT) and a direct agglutination test (DAT). Combined multiple-testing and several statistical methods were compared to estimate the CanL true prevalence and tests characteristics (sensitivity and specificity). The Bayesian full model showed the best fit and yielded prevalence estimates between 11% (Mostaganem, first period) and 38% (Bejaia, second period). Sensitivity of IFAT varied (in function of locality) between 86% and 88% while its specificity varied between 65% and 87%. DAT was less sensitive than IFAT but showed a higher specificity (between 80% and 95% in function of locality or/and season). A general increasing trend of the CanL prevalence was noted from west to east. A concordance between the present results and the incidence of human cases of visceral leishmaniasis was observed, where also a maximum was recorded for Bejaia. The results of the present study highlight the dangers when using IFAT as a gold standard.