Publications by authors named "Rachid Kaidi"

Article Synopsis
  • Crimean-Congo hemorrhagic fever (CCHF) is a viral disease transmitted by ticks, and its prevalence in northern Africa, particularly Algeria, is not well understood.
  • A study was conducted on 269 camels in southern Algeria to determine CCHFV antibodies, revealing a high seroprevalence rate of 94.8%.
  • The presence of ticks was identified as a significant risk factor for CCHF exposure in camels, urging further research on CCHFV's impact on humans, animals, and ticks in the region.
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  • Coxiella burnetii, the agent responsible for Q fever, affects both human and livestock health, particularly in cattle where it causes reproductive issues and can be transmitted through birth fluids, milk, and placental tissues.
  • A study in Kabylia, northern Algeria analyzed 184 dairy farms and found a 26.63% prevalence of Coxiella burnetii antibodies, indicating significant exposure among local cattle.
  • Risk factors identified include cattle cohabitating with small ruminants, exposure to prevailing winds, and the frequency of veterinarian visits, suggesting the need for better hygiene practices to reduce Q fever transmission.
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Rift Valley fever (RVF) is a mosquito-borne viral zoonosis caused by the Rift Valley fever virus (RVFV). The present work aims to investigate the epidemiological status and identify the risk factors associated with RVFV infection in dromedary camels (Camelus dromedarius) from southern Algeria. A total of 269 sera of apparently healthy camels was collected and tested using a competitive Enzyme-Linked Immunosorbent Assay (ELISA).

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The present study was designed to evaluate the protective effects of ascorbic acid (AA) against lambda cyhalothrin insecticide formulation Ampligo® (AP)-induced testicular toxicity in rabbit laboratory strain ITELV2006 (Oryctolagus cuniculus). Twenty rabbits were randomly divided into four equal groups and treated by oral gavage for 21 consecutive days: Group 1 served as a control and received 1 ml of distilled water, group 2 was supplemented with1ml of ascorbic acid (AA) dilution (200 mg/kg b.w), Group 3 was treated with a dose of AP at 20 mg/kg bw (1 µl/1 ml of distilled water/animal), whereas group 4 was co-administered AA and AP as the same dose of group 2 and 3, respectively.

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Background And Aim: An ethnobotanical survey was carried out among the inhabitants of the Aflou region of Laghouat (Southern Algeria). This study was considered as a first step toward the identification of new bioactive antiparasitic molecules. The preservation and documentation of this traditional knowledge will ensure its continuity and transmission from one generation to another, especially because of the emergence of resistant parasites and the lack of references caused by the lack of work in this area; therefore, we intended to inventory and collect the maximum amount of information on medicinal plants that are traditionally used by the local population as antiparasitic in humans and animals (small ruminants, cattle, and livestock).

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Background And Aim: Ovarian cysts (OC) in female dromedary camels have been described as problematic because they can cause infertility. This study aimed to compare the hormone concentrations and biochemical contents present in serum and follicular fluid of normal and cystic she-dromedaries of the two most common Algerian camel breeds (Sahraoui and Targui) to gain a better understanding of biological differences that may yield insights into preventing or treating this ovarian abnormality.

Materials And Methods: At an abattoir in southeastern Algeria, 100 pairs of the same females' ovaries and blood samples were taken immediately after the slaughter of clinically healthy, non-pregnant females (8-15 years old) over two consecutive breeding seasons (November 2017-April 2018 and November 2018-April 2019).

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Leptospirosis is an anthropozoonosis disease of worldwide distribution caused by mobile spirochetes of the genus and rodents, mainly rats, are described as its primary reservoir. In Algeria, there is limited data about the prevalence of spp. in humans and animals, as well as carriage in wild rodents.

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Meat is a food of animal origin, which can be contaminated by infectious, parasitic and other non-infectious agents responsible for diseases, which threaten the health of consumers. This still poses a public health problem in Algeria and in many countries. In order to assess the epidemiological situation of certain diseases in the Taher region in Jijel and to determine the influence of certain variation factors and to estimate the risk on public health, a study was extended over a period of 14 months on a total of 1756 cattle slaughtered at the Taher slaughterhouse.

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Article Synopsis
  • Infectious bovine rhinotracheitis (IBR) is a significant health issue linked to bovine herpesvirus-1 (BHV-1) and was studied in dromedary camels in Algeria.
  • The study analyzed blood samples from 865 camels, revealing a seroprevalence of 3.7%, with 21.4% of herds having at least one positive camel.
  • Key risk factors for BHV-1 infection included the introduction of purchased animals, highlighting potential transmission pathways and raising concerns about camels as reservoirs for the virus.
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Background And Aim: Since 2017, there have been epidemics with respiratory disorders in the laying hen farms in Algeria, as signs and lesions, respiratory difficulties, and hemorrhagic tracheitis, which closely like laryngotracheitis. This study aimed to analyze the epidemiological, serological, and clinical indicators, as well as the risk factors, of infectious laryngotracheitis (ILT) in layer hen flocks in Algeria.

Materials And Methods: A total of 1728 layer hens were sampled randomly from 48 poultry houses.

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Background And Aim: Knowledge of potentially pathogenic bacteria presents in the oral cavity of dogs and cats may be helpful in determining appropriate treatment for infected bite wounds. About 120.000 people are exposed to dog and cat bites every year in Algeria, but little is known about the dog and cat oral flora causing bite wound complications.

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  • Surra, caused by Trypanosoma evansi, is a major concern for camel-rearing areas in Africa and Asia due to its negative impacts on milk yield and animal health, leading to economic losses.
  • A study in Algeria tested 865 dromedary camels and found a high seroprevalence of T. evansi, with 49.5% infected at the individual level and 73.2% at the herd level, indicating significant exposure.
  • Key risk factors for T. evansi infection included geographical area, herd size, husbandry practices, and water access, but breed, sex, and age were not associated with infection rates.
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The study aimed at assessing the prevalence of toxoplasmosis due to T. gondii in dromedaries by the ELISA test and to identify associated risk factors. A cross-sectional study was performed on 320 dromedaries (Camelus dromedaries) from January to March 2018 in four provinces of southeastern Algeria (Biskra, El- Oued, Ouargla, and Ghardaia).

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Chlamydiosis is caused by an obligate intracellular gram-negative bacterium of the genus Chlamydophila which is a zoonotic pathogen. The objectives of the study were to identify the seroprevalence of antibodies against Chlamydophila abortus in dromedary camel herds from four districts in eastern Algeria, as well as to estimate the association between seroprevalence and certain factors present at the animal and herd levels. Blood samples were collected from a random sample of animals within each of 82 camel herds.

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A radioimmunoassay (RIA) method for progesterone has been developed. It has been validated for the determination of progesterone in cow skim milk. The main reagents used in the development work were prepared and characterized in-house.

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Objective: To explore feeding strategies and identify eventual errors that could cause poor production and reproduction performances in dairy farms in the north of Algeria.

Materials And Methods: A survey was conducted among 211 farms of different sizes, from 2014 to 2018 to compose a database that is analyzed statistically.

Results: The results relative to the nutritive value of the rations showed an average dry matter intake of 15.

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Background And Aim: The Barb horse occupies a prominent place in the history, culture, and equestrian traditions of the Maghreb (Algeria, Morocco, and Tunisia). Although many studies on the breed standard and morphometry have been published, there are no studies on its fertility and reproductive potential. Thus, this work aimed to study the fertility of Barb, Arabian Purebred, and Thoroughbred horses in Algeria.

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Aim: The work aimed at studying the serological and clinical factors, as well as the risk factors of the Newcastle disease (ND) on broilers herds in Algeria.

Materials And Methods: A sample of 1248 birds was randomly selected from 52 broiler flocks. We took blood samples from each bird at the level of the wing vein area where an indirect enzyme-linked immunosorbent assay technique was carried out through the use of an IDvet kit.

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Objective: This work aimed to determine the resistance and/or the susceptibility to antibiotics of staphylococci isolated from cattle with mastitis in the North of Algeria.

Materials And Methods: The disk diffusion method was carried out to reveal the antibiotic resistance in accordance to the National Committee for Clinical Laboratory Standards guidelines in the Mueller-Hinton agar.

Results: Coagulase-negative (CNS) isolates showed more resistance to Cefoxitin, Amoxicillin + Clavulanic Acid, Vancomycin, Trimethoprime Sulfamethoxazole, Clindamycine, Neomycin, and Erythromycin than Coagulase-positive (CPS).

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Aim: The present cross-sectional study aimed at assessing the seroprevalence of infection both at herd and within herd and at determining risk factors that are associated with its seropositivity.

Materials And Methods: A total of 90 cows distributed over seven herds located in two North-Eastern Algerian provinces were blood sampled in order to be tested for the presence of antibodies against using a commercially available enzyme-linked immunosorbent assay kit.

Results: The individual seroprevalence of was found to be 12.

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A cross-sectional study aimed at assessing the seroprevalence and identifying the risk factors for infection in cattle, sheep, and goats in eight provinces located in two main Algerian agro-ecological zones was carried out from October 2015 to March 2018. Blood sera from 4074 animals of both sexes were tested for the presence of anti- IgG antibodies, using the indirect, enzyme-linked, immunosorbent assay technique (ELISA). Moreover, to identify the potential risk factors of infection, a survey through a breeders' questionnaires was conducted.

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Although T. gondii is of considerable both public and veterinary importance worldwide, studies on its existence in sheep in Algeria, either through serology and or parasitology is scarce. To this end, a cross-sectional study was carried out in Tébessa, an Algerian eastern province, to, firstly, investigate the seroprevalence of T.

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Neonatal calf diarrhoea triggered by the enteric protozoan parasite Cryptosporidium is a leading cause of morbidity and mortality in calves aged 1-month-old or younger globally. Infected cattle in general and calves in particular have also been demonstrated as major contributors of zoonotic C. parvum oocysts in the environment and have been linked to a number of waterborne outbreaks of human cryptosporidiosis.

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Avian pathogenic E. coli (APEC) is the etiologic agent of avian colibacillosis, the most common disease responsible for chicken morbidity in the world. Although multiple virulence-associated factors were identified, their prevalence in Algeria is still poorly known.

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