Chafik redha C R Messai | Ecole Nationale Supérieure Vétérinaire d'Alger (original) (raw)
Uploads
Papers by Chafik redha C R Messai
African Journal of Microbiology Research, 2013
In Setif East Algeria, one hundred and eighty Escherichia coli strains were isolated frombroiler ... more In Setif East Algeria, one hundred and eighty Escherichia coli strains were isolated frombroiler chickens with colibacillosis and were examined for susceptibility to antimicrobials of veterinary significance. In vitro antibiotic activities of 12 antibiotic substances against the isolates were determined by disc diffusion test. Antibiogram revealed a high level of resistance to enrofloxacin (72.2%), neomycin (75%), trimethoprim-sulfmethoxazole (82.2%), ampicillin (84.5%) and amoxicillin (87.8%), nalidixic acid (96.7%) and doxycycline (98.3%). There were moderate levels of resistance to chloramphenicol (45.6%) and streptomycin (66.1%). There were low levels of resistance to nitrofurantoin (18.9%), colistin (5.5) and gentamicin (5.5%). All strains were multi-drug resistant and more than half (56.1%) of the isolates were resistant to eight antibiotics. Thus, 60 antibiotic resistant patterns in E. coli strains were isolated, of which 13 were present significantly. These findings suggest ...
Background and Aim: Since 2017, there have been epidemics with respiratory disorders in the layin... more 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. Blood samples were collected from each hen at the wing vein area, and an indirect enzyme-linked immunosorbent assay was done using an IDvet® kit. Results: The flocks showed 56.25% seroprevalence. Clinical signs and gross lesions of ILT suspect cases included respiratory signs characterized by hemorrhagic tracheitis and sinusitis; conjunctivitis; egg drop; and a low mortality rate varying from 5% to 20%. Statistical analyses showed the effect of risk factors on the seropositiv...
Veterinary World, Jul 2, 2019
Aim: The work aimed at studying the serological and clinical factors, as well as the risk factors... more 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. Results: The flocks showed 82.69% of seroprevalence. Clinically speaking, the most common symptoms were sneezing, rale, greenish diarrhea, torticollis, and motor discords. Most commonly observed postmortem lesions were the proventriculitis, tracheitis, and enteritis. Especially, the caeca are hemorrhagic. The scores show the effect of risk factors. There was a significant effect on the mortality, the hygiene and vaccination groups on antibody titers in time 2. The antibody titers were elevated in the herd that recorded a high mortality (more than 10%) compar...
Veterinary parasitology, Jan 23, 2013
In Setif East Algeria, one hundred and eighty Escherichia coli strains were isolated from broiler... more In Setif East Algeria, one hundred and eighty Escherichia coli strains were isolated from broiler chickens with colibacillosis and were examined for susceptibility to antimicrobials of veterinary significance. In vitro antibiotic activities of 12 antibiotic substances against the isolates were determined by disc diffusion test. Antibiogram revealed a high level of resistance to enrofloxacin (72.2%), neomycin (75%), trimethoprim-sulfmethoxazole (82.2%), ampicillin (84.5%) and amoxicillin (87.8%), nalidixic acid (96.7%) and doxycycline (98.3%). There were moderate levels of resistance to chloramphenicol (45.6%) and streptomycin (66.1%). There were low levels of resistance to nitrofurantoin (18.9%), colistin (5.5) and gentamicin (5.5%). All strains were multi-drug resistant and more than half (56.1%) of the isolates were resistant to eight antibiotics. Thus, 60 antibiotic resistant patterns in E. coli strains were isolated, of which 13 were present significantly. These findings suggest the need for the introduction of surveillance programs in Algeria to monitor antimicrobial resistance in pathogenic bacteria that could be potentially transmitted to humans from animal food.
African Journal of Microbiology Research, 2013
In Setif East Algeria, one hundred and eighty Escherichia coli strains were isolated frombroiler ... more In Setif East Algeria, one hundred and eighty Escherichia coli strains were isolated frombroiler chickens with colibacillosis and were examined for susceptibility to antimicrobials of veterinary significance. In vitro antibiotic activities of 12 antibiotic substances against the isolates were determined by disc diffusion test. Antibiogram revealed a high level of resistance to enrofloxacin (72.2%), neomycin (75%), trimethoprim-sulfmethoxazole (82.2%), ampicillin (84.5%) and amoxicillin (87.8%), nalidixic acid (96.7%) and doxycycline (98.3%). There were moderate levels of resistance to chloramphenicol (45.6%) and streptomycin (66.1%). There were low levels of resistance to nitrofurantoin (18.9%), colistin (5.5) and gentamicin (5.5%). All strains were multi-drug resistant and more than half (56.1%) of the isolates were resistant to eight antibiotics. Thus, 60 antibiotic resistant patterns in E. coli strains were isolated, of which 13 were present significantly. These findings suggest ...
Background and Aim: Since 2017, there have been epidemics with respiratory disorders in the layin... more 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. Blood samples were collected from each hen at the wing vein area, and an indirect enzyme-linked immunosorbent assay was done using an IDvet® kit. Results: The flocks showed 56.25% seroprevalence. Clinical signs and gross lesions of ILT suspect cases included respiratory signs characterized by hemorrhagic tracheitis and sinusitis; conjunctivitis; egg drop; and a low mortality rate varying from 5% to 20%. Statistical analyses showed the effect of risk factors on the seropositiv...
Veterinary World, Jul 2, 2019
Aim: The work aimed at studying the serological and clinical factors, as well as the risk factors... more 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. Results: The flocks showed 82.69% of seroprevalence. Clinically speaking, the most common symptoms were sneezing, rale, greenish diarrhea, torticollis, and motor discords. Most commonly observed postmortem lesions were the proventriculitis, tracheitis, and enteritis. Especially, the caeca are hemorrhagic. The scores show the effect of risk factors. There was a significant effect on the mortality, the hygiene and vaccination groups on antibody titers in time 2. The antibody titers were elevated in the herd that recorded a high mortality (more than 10%) compar...
Veterinary parasitology, Jan 23, 2013
In Setif East Algeria, one hundred and eighty Escherichia coli strains were isolated from broiler... more In Setif East Algeria, one hundred and eighty Escherichia coli strains were isolated from broiler chickens with colibacillosis and were examined for susceptibility to antimicrobials of veterinary significance. In vitro antibiotic activities of 12 antibiotic substances against the isolates were determined by disc diffusion test. Antibiogram revealed a high level of resistance to enrofloxacin (72.2%), neomycin (75%), trimethoprim-sulfmethoxazole (82.2%), ampicillin (84.5%) and amoxicillin (87.8%), nalidixic acid (96.7%) and doxycycline (98.3%). There were moderate levels of resistance to chloramphenicol (45.6%) and streptomycin (66.1%). There were low levels of resistance to nitrofurantoin (18.9%), colistin (5.5) and gentamicin (5.5%). All strains were multi-drug resistant and more than half (56.1%) of the isolates were resistant to eight antibiotics. Thus, 60 antibiotic resistant patterns in E. coli strains were isolated, of which 13 were present significantly. These findings suggest the need for the introduction of surveillance programs in Algeria to monitor antimicrobial resistance in pathogenic bacteria that could be potentially transmitted to humans from animal food.