Journal of Veterinary Medical Research

Journal of Veterinary Medical Research

Basic info

  • Publisher: Faculty of Veterinary Medicine, Beni-Suef University
  • Country of publisher: egypt
  • Date added to EuroPub: 2019/Nov/23

Subject and more

  • LCC Subject Category: Veterinary Sciences
  • Publisher's keywords: Veterinary Medical
  • Language of fulltext: english
  • Time from submission to publication: 5 weeks

Publication charges

  • Article Processing Charges (APCs): Yes, 100 USD
  • Submission charges: No
  • Waiver policy for charges? No

Open access & licensing

  • Type of License:
  • License terms
  • Open Access Statement: Yes
  • Year open access content began: 1990
  • Does the author retain unrestricted copyright? True
  • Does the author retain publishing rights? True

Best practice polices

  • Permanent article identifier: DOI
  • Content digitally archived in:
  • Deposit policy registered in: None

This journal has '163' articles

Pathogenicity of Escherichia coli O125 in commercial broiler chickens

Pathogenicity of Escherichia coli O125 in commercial broiler chickens

Authors: Asmaa Abd Elatiff, Azza A. El-Sawah, Mohamed M. Amer, Al-Hussein M. Dahshan, Hala Salam, Salama A.S.Shany
Year: 2019, Volume: 26, Number:
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Abstract

Commercial broiler chickens are frequently infected with Ecoli serotypes in form of collibacillosis which characterized as an initial respiratory infection (air sacculitis) followed by generalized septicemia, perihepatitis and pericarditis. The present work aimed to study the ability of E.coli O125 previuosly isolated and identified from diseased broilers suffered from pericarditis , airsacculitis and perihapatitis to induce a disease and The current study aimed to determine the pathogenicity of E. coli serogroup O125 in broiler chicks, a trial of prevention and treatment using probiotic ( Guardyazin-m) or antibiotic (Cipronate20%). The chicks were divided into seven groups including control negative, orally infected , subcutenously infected , probiotic treated group, and finally antibiotic treated group. The clinical signs, mortality, performance parameters and postmortem examination as well as the pathological changes in liver and intestine were recorded. The probiotic group gave the best results in controlling infection by E. coli O125 followed by antibiotic. In conclusion, the E. coli O125 serogroup was pathogenic to chicks when experimentally inoculated, so particular attention must be directed toward E. coli O125 as a pathogen infecting bird. Also probiotics was of great value in protection against the E. coli infection and improve the performance parameters of chicks . Its effect on feed consumption , weekly body weight gain and feed conversion rate (FCR) was determined.

Keywords: Chickens Broilers E. coli Pericarditis FCR
EFFECT OF SOME PLANT OILS ON REPRODUCTIVE ACTIVITIES IN FEMALE
ALBINO RATS

EFFECT OF SOME PLANT OILS ON REPRODUCTIVE ACTIVITIES IN FEMALE ALBINO RATS

Authors: Mabrouk E.A., Ali K.M., Nermeen A. Helmy, Rehab M. Reda.
Year: 2019, Volume: 26, Number:
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Abstract

The present study aimed to determine the effect of adding plant oils; extra virgin olive oil (EVOO), sunflower and soybean to animal feed on serum estradiol (E2) and progesterone (P4) levels, histological structure of ovaries and in vitro maturation of oocytes (IVM). A total of 60 mature female Albino rats were used. Animals were divided equally into 5 groups; control group (received standard diet), group II (received EVOO), group III (received sunflower oil), group IV (received soybean oil) and group VI (received oil mixture which consist of sunflower and soybean oils). After 6 weeks of feeding oil addited diet, blood samples were collected from all rats throughout the different stages of estrous cycle. Sera were used for determination of serum E2 and P4 levels. Only females that were not in estrus were scarified after the last blood sample collection, ovaries were harvested for histopathological examination and for in vitro maturation. Results showed that none of oils led to ovarian changes except soybean oil and oil mixture, cause congestion of some ovarian blood vessels. It was also noted that the hormonal pattern didn’t differ significantly among different treatments within the same stage of the cycle, except for the group received oil mixture where E2 and P4 levels decreased significantly (P < 0.05) during metestrus and diestrus phases, respectively. In the treated groups, the highest significant (P < 0.05) oocyte recovery rate (RR) (5.43 ± 0.23% and 4.41± 0.13%) and maturation rate (MR) (79.17 ± 2.03% and 73.43 ± 1.97%) were attained after application of EVOO followed by sunflower oil, respectively. While the lowest values were calculated with the soybean oil and oil mixture (3.83 ± 0.13 % and 2.50 ± 0.16 %) and (68.18 ± 2.29 % and 62.50 ± 2.23 %), respectively. It could be concluded that EVOO as well as sunflower oil have a beneficial influence on ovarian functional performance, retrieval of high number of good quality oocytes and raise oocyte maturation.

Keywords: EVOO, Soybean oil, Sunflower oil, In vitro maturation, Fatty acids, Estrous cycle in rat, Estrogen and progesterone
Magnetic resonance imaging for detection of some foot lesions causing
lameness in donkeys (Equus asinus)

Magnetic resonance imaging for detection of some foot lesions causing lameness in donkeys (Equus asinus)

Authors: Ragab G. A., Fathy M. Z.
Year: 2019, Volume: 26, Number:
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Abstract

Magnetic resonance imaging (MRI) is a good useful imaging tool for diagnosing foot lameness in equine. Seventeen donkeys of age (6–12 years), gender admitted to the clinic unit of our collage with owners complained that the animals were suffered from incurable lameness in their forelimbs. All forelimb foots were collected at the level of fetlock joint after euthanasia for performing MR imaging .The results showed that, both normal anatomy to the foot using T1-weighted image sequence and detection of different lesions involving many parts of the foot such as collateral ligaments of the DIP joint, both DDFT core and border, both navicular bone medullary cavity and cortex, articular cartilage of DIP joint, distal sesamoidean impair ligament (DSIL) and suspensory ligament of the navicular bone that could not be diagnosed by other diagnostic tools such as X- ray, ultrasound and Computed Tomography. In conclusion, Using MRI in examination of donkey foot lameness is considered as a definitive and accurate diagnostic tool for design suitable treatment regimens for all affections.

Keywords: MRI Forelimb Foot, Affections Donkeys
EFFECT OF VIRGIN OLIVE OIL SUPPLEMENTATION ON LIPID PROFILE AND OXIDATIVE STATUS IN RATS

EFFECT OF VIRGIN OLIVE OIL SUPPLEMENTATION ON LIPID PROFILE AND OXIDATIVE STATUS IN RATS

Authors: Farahat A. A., Sawiress F. A., Aghwider A. A.
Year: 2019, Volume: 26, Number:
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Abstract

The aim of the present study is to investigate the effect of virgin olive oil on some blood parameters in male Albino rats supplemented with normal diet. thirty male Sprague Dawley rats, (90-110 g), were used in the present study, and were divided into three groups (10 in each), 1st group (control), received basal diet and supplemented with 1ml saline. 2nd and 3rd groups received basal diet, and supplemented daily with 1ml/100 gm B.W and 2ml/100 gm B.W of virgin olive oil (VOO), respectively for 4 weeks. Blood samples were collected weekly from all rats. Serum samples was obtained for assay of lipid profile levels and hepatic lipid peroxidation (MDA) enzyme. Blood lysate was used for antioxidant enzymes activities SOD, GPx and CAT.

Keywords: Antioxidant parameters, kidney functions, Lipid profile, Virgin olive oil.
EFFECT OF VIRGIN OLIVE OIL SUPPLEMENTATION ON SOME HEMATOLOGIC AND
THYROID HORMONES, LEVELS IN RATS

EFFECT OF VIRGIN OLIVE OIL SUPPLEMENTATION ON SOME HEMATOLOGIC AND THYROID HORMONES, LEVELS IN RATS

Authors: Farahat A. A., Sawiress F. A., Aghwider A. A.
Year: 2019, Volume: 26, Number:
(0 downloads)
Abstract

The aim of the present study is to investigate the effect of virgin olive oil on some blood parameters in male Albino rats. Thirty male Sprague Dawley rats, (90-110 g), were used in the present study and were divided into three groups (10 in each), 1st group (control), received basal diet and supplemented with 1ml saline. 2nd and 3rd groups received basal diet, and supplemented daily with 1ml/100gm B.W and 2ml/100 gm B.W of virgin olive oil (VOO), respectively. Blood samples were collected weekly from all rats. Whole blood was obtained for determination of some haematological parameters, while sera were collected for the assay of T3 and T4 hormone.

Keywords: Haematological parameters, T3 and T4 hormone, Virgin olive oil, Progesterone
Serogrouping and resistance gene detection in avian pathogenic E.coli
isolated from broiler chickens

Serogrouping and resistance gene detection in avian pathogenic E.coli isolated from broiler chickens

Authors: Asmaa Abd Elatiff, Azza A. El-Sawah, Mohamed M. Amer, Al-Hussein M. Dahshan, Hala Salam, Salama A.S.Shany
Year: 2019, Volume: 26, Number:
(0 downloads)
Abstract

E coli infection in poultry is one of the principle causes of mortality and morbidity in chickens and turkeys resulting in retardation of growth and decreased feed conversion rate . The most common form of collibacillosis is characterized as an initial respiratory infection (air sacculitis) followed by generalized septicemia, perihepatitis and pericarditis. The present study aimed to identify the bacteria associated with pericarditis , air sacculitis and perihapatitis in Egyptian broilerchickens. A total 300 samples of diseased and dead broilers from 3-6 weeks age were collected. The isolated bacteria included E. coli, Klebsiella spp., Shigella spp. And Enterobacter spp. Sero-grouping of the isolated E. coli strains revealed O125, O158, O55,O129, O20 , O6 , O8 , O27, O115, O142 and un-typed strains with prevalence of 16%, 12%, 8%, 8%, 8% , 8% , 8% , 8% ,4%,4% and 16% respectively. The majority of E coli isolates were sensitive to colistin sulphate (38%) and Norofloxacin (38%) followed by ciprofloxacin (19%), cefotaxim (19%) and Ofloxacin (19%). On the other hand, E coli were resistant (100%)to amoxicillin, clindamycin , Erythromycin and streptomycin. PCR analysis for antibiotic resistance genes of E coli detected that 12 serogroups isolates were positive using the specific primers for Aada2 , BlaCTX and TetA(A) genes. The current study demonstrated the high prevalence of E. coli indeed broilers suffered from pericarditis , perihepatitis and airsacculitis . Measures are needed to control E. coli contamination in poultry farms to reduce economic losses caused by infection of E.coli.

Keywords: Chickens Broilers E. coli Pericarditis FCR
Antimicrobial and immunological studies on Pasteurella
multocida and Mannheimia haemolytica recovered from calves
affected with respiratory manifestations

Antimicrobial and immunological studies on Pasteurella multocida and Mannheimia haemolytica recovered from calves affected with respiratory manifestations

Authors: El-Seedy F.R., Abed A.H., Hassan H.M., Nabih A.M., Khalifa E., Salem S.E
Year: 2019, Volume: 26, Number:
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Abstract

Pneumonic pasteurellosis is the main cause of severe respiratory tract infections in calves and causing great economic losses. The objective of this research was to study the antimicrobial susceptibility of P. multocida and M. haemolytica and detection the effect of Lysozyme and Nitric oxide; as immune parameters, on most important bacteria causing pneumonic pasteurellosis in cattle calves. A total number of 406 deep nasal swabs and blood samples were collected from 406 bovine calves suffered from respiratory manifestations. Bacteriological examination revealed that the overall prevalence of both P. multocida and M. haemolytica was of 26.6%; 18.2% for P. multocida and 8.4%for M. haemolytica. P. multocida was singly isolated from 4.9% of cases. While it was mixed with S. aureus, E. coli, Streptococcus spp., both S. aureus and E. coli, both S. aureus and Streptococcus spp. and both E. coli and Streptococcus spp. with percentages of 4%, 1.2%, 2.2%, 1.7%, 3.2% and 1.0%, respectively. Meanwhile, M. haemolytica was isolated as a single isolate from 1.7% of cases while it was mixed with S. aureus, Streptococcus spp., both S. aureus and Streptococcus spp. and both E. coli and Streptococcus spp. with percentages of 2.7%, 1.2%, 2.5% and 0.2%, respectively. The in in-vitro sensitivity testing of all isolates showed high susceptibility to Fluoroquinolones and cephalosporins. On the other hand, high resistances were obtained against tetracyclines, penicillins and aminoglycosides. On the immunological level, the data of the existing research show that all respiratory affected calves record significant elevation of nitric oxide level in compare with normal control calves. However, all infected calves elucidate significant reduction of lysozyme activity.

Keywords: P. multocida, M. haemolytica, Antimicrobial, immune parameters Nitric oxide, Lysozyme
Correlation between Aspergillus fumigatus isolates recovered from
human and broiler chickens

Correlation between Aspergillus fumigatus isolates recovered from human and broiler chickens

Authors: Radwan I.A., Kamel M.F., Hamdy D.A., Mahmoud Z.A.
Year: 2019, Volume: 26, Number:
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Abstract

A total of 225 samples were collected from suspected cases and they were 75 human samples (40 ear swabs, 29 vaginal swabs and 6 sputum samples) and 150 from broiler chickens for microbiological examination and fungal isolation, they collected from different areas in El-Fayoum and BeniSuef governorates, from which 129 fungal isolates were recovered, 22 fungal isolates( 29.3%) were recovered from human; of which 15 isolates of ear swabs ( A.fumigatus 37.5%) while 7 (24.1%) A.fumigatus isolates were recovered from women, but there was no A.fumigatus recovered from sputum samples, as well as there were 53 A.fumigatus isolates (35.3%) recovered from broiler chicken. The antifungal activities of thymol and carvacrol oils against the recovered fungal isolates were tested using agar dilution method. Thymol and carvacrol oils completely inhibited the growth of different fungal isolates at concentrations of 1% and 0.1%. On the other hand, the concentration of 0.01% was too weak to inhibit the fungal growth, but it completely reduced the colour of the fungal colony converted it into white coloured arial mycelium. PCR assay using oligonucleotide primer that amplifying 250bp fragment in its Gene of A.fumigatus and A.niger was performed. Sequence analysis of two isolates of A.niger and A.fumigatus using its Gene was performed.

Keywords: A.fumigatus, Human, Broiler chickens
Clinical evaluation of epidural bupivacaine, butorphanol, and butorphanol
- bupivacaine combination in goat

Clinical evaluation of epidural bupivacaine, butorphanol, and butorphanol - bupivacaine combination in goat

Authors: Hagag U., Mahmoud M.M.
Year: 2019, Volume: 26, Number:
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Abstract

Butorphanol is a synthetic opioid commonly used for epidural anesthesia in human either alone or in combination with bupivacaine but not in goat. The objective of the present study was to evaluate the analgesic effect of epidural butorphanol either alone or in combination with bupivacaine. Fifteen adult apparently healthy goats were randomized into three equal groups to receive a lumbosacral epidural injection of bupivacaine 0.5 % (0.5 mg/kg), butorphanol 1% (0.08 mg/kg) or their combination (bupivacaine 0.25 mg/kg and butorphanol 0.04 mg/kg). Animals were observed for incoordination of hind limbs, perineal pin prick and sedation at 10 minutes interval. Heart rate, respiratory rate and rectal temperature were assessed every 15 minutes. Epidural butorphanol resulted into significantly (P < 0.05) rapid analgesia (9.8 ± 1.1 Min) than the butorphanol– bupivacaine combination (12.8 ± 0.84 Min) and bupivacaine (16.6 ± 0.55). Butorphanol-bupivacaine combination provoked significant ((P < 0.05) prolonged intense analgesia (208 ± 8.36 Min) compared to either bupivacaine (112 ± 8.37) or butorphanol (166 ± 5.48 Min). Ataxia accompanied administration of bupivacaine either alone or in combination with butorphanol, while sedation was observed in animals received butorphanol alone or combined with bupivacaine. No significant changes were observed in heart rate, respiratory rate or rectal temperature. The epidural administration of butorphanol-bupivacaine combination promoted longer-lasting analgesia in goats without motor disturbances compared to bupivacaine alone. This combination might prove useful clinically to provide analgesia in goats for long-duration perineal obstetrical or surgical procedures.

Keywords: Epidural, goats, bupivacaine, butorphanol
Bacteriological studies on calves affected with respiratory
manifestations

Bacteriological studies on calves affected with respiratory manifestations

Authors: El-Seedy F.R., Abed A.H., Hassan H.M., Nabih A.M., Khalifa E., Salem S.E.
Year: 2019, Volume: 26, Number:
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Abstract

Bovine respiratory disease (BRD) is the most common and costly disease affecting beef cattle calves in the world. The objectives of this study were to put a high light on epidemiology of P. multocida and M. haemolytica as important causes of bovine respiratory disease (BRD) in Egypt Governorates; Giza,El-Fayoum,BeniSuef, Assiut and Sohag. A total number of 406 deep nasal swabs and blood samples were collected from 406 bovine calves suffered from respiratory manifestations reared in different Governorates in Egypt. Bacteriological examination was achieved and isolation of P. multocida and M. haemolytica were attained. The overall prevalence of bothP. multocida and M. haemolytica was of 26.6%; 18.2% for P. multocida and 8.4%for M. haemolytica. EL-Fayoum Governorate showed the highest prevalences while Beni-Suef Governorate showed the lowest prevalences. P. multocida was singly isolated from 4.9% of cases. While it was mixed with S. aureus, E. coli, Streptococcus spp., both S. aureus and E. coli, both S. aureus and Streptococcus spp. and both E. coli and Streptococcus spp. with percentages of 4%, 1.2%, 2.2%, 1.7%, 3.2% and 1.0%, respectively. Meanwhile, M. haemolytica was isolated as a single isolate from 1.7% of cases while it was mixed with S. aureus, Streptococcus spp., both S. aureus and Streptococcus spp. and both E. coli and Streptococcus spp. with percentages of 2.7%, 1.2%, 2.5% and 0.2%, respectively. In conclusion respiratory manifestations are very important disorders in bovine calves. P. multocida and M.haemolytica are the most common bacteria causing infection.

Keywords: P. multocida, M. haemolytica, Bovine respiratory disease, prevalence
A study on the effect of age, breed and season on sexual behaviour,
testosterone concentrations and scrotal circumference in Egyptian rams

A study on the effect of age, breed and season on sexual behaviour, testosterone concentrations and scrotal circumference in Egyptian rams

Authors: Ahmad S. Mostafa, Mostafa M. Farghal
Year: 2019, Volume: 26, Number:
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Abstract

The objective of this study was to detect the influence of age, breed and season on sexual behaviour, testosterone concentrations and scrotal circumference in Egyptian rams. The study was carried out at agricultural research center belonging to Minia University, Shosha village, Samalut city, El-Minia. Ten crossbred and five adult Ossimi rams were used during this study. Every ram was allowed to breed two ewes to evaluate its sexual behaviour for a twenty minutes test. Blood samples were collected three times per season at two weeks interval from each ram during the period of experiment to measure testosterone concentrations. Also, scrotal circumference was measured at the same frequency and time interval as blood samples. Sexual behaviour was better in old rams than young ones (p<0.01), but it was not affected by breed or season (p>0.05). Serum testosterone level was higher at autumn (7.13±02.9 ng/ml) than at winter (5.54±0.29 ng/ml) in crossbred rams (p<0.01), while in Ossimi rams, higher level was obtained in spring (8.24±.39 ng/ml) than in summer (3.99±0.40 ng/ml). Mean scrotal circumference was higher in older rams (30.20±1.20 cm) than younger rams (22.53±1.27 cm). There was no significant difference for measures of scrotal circumference between crossbred rams (30.86±1.09 cm) and Ossimi rams (30.93±1.06 cm). Season had no significant effect on scrotal circumference in crossbred rams, whereas in Ossimi rams the effect of season was significantly obvious with the highest and lowest values were recorded in spring (31.0±1.05 cm) and winter (30.60±1.17 cm) respectively. It could be concluded from this study that the age of rams had a great influence on their sexual behaviour and scrotal circumference, while the effect of breed and season on sexual behaviour and scrotal circumference was not clear.

Keywords: Sheep, Sexual behaviour, Scrotal circumference and Testosterone.
Pesticides residues in retail meat and offal

Pesticides residues in retail meat and offal

Authors: Khalafalla F.A, Abdel-Atty N. S, Omima I.Ali, Rofaida B. Abo-Elsoud
Year: 2019, Volume: 26, Number:
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Abstract

Pesticides are used extensively especially in developing countries like Egypt to control pest either in animal or in agriculture, which may lead to harmful residues in foods of animal origin. The current study was conducted to estimate the residue level of OC and pyrethroid in 320 beef and sheep samples (160each) collected from different shops at Beni-Suef governorate during summer and winter season. The collected samples were liver, muscle, kidney, and fat (80 each; 4o from each animal species).Among fourteen organochlorine compound examined, only Alpha HCH was detected in samples of cattle and sheep collected through winter season in a level below the MRL, while through summer season, only Alpha HCH and Delta HCH were detected in sheep samples in a level below the MRL. Pyrethroid pesticides residues represented by cypermethrin, deltamethrin, Esfenvalerate, permethrin were not detected through winter season, while they were detected in muscles of cattle and fat of sheep through summer season, while Labdacyhalothrin, bifenthrin, cyfluthrin, Meothrin were detected in most of examined samples from different species through winter and summer seasons, most of these results revealed higher mean level than the maximum residue limits. From these results most of OC could not be detected may be due to these compounds not used since 1970, and is rather than it still used nowadays in Egypt either in agriculture or as spray in animals to control ectoparasites spatially in summer season.

Keywords: Pesticides residues; Gaschromatography; Organochlorine; Pyrethroid; Beef; Sheep.
Molecular characterization and genotyping of recent isolate of
Infectious Bronchitis Virus (IBV) in Egypt

Molecular characterization and genotyping of recent isolate of Infectious Bronchitis Virus (IBV) in Egypt

Authors: Mostafa M. Hammouda, Abdelsattar M. Arafa, Hanafy M. Madbouly
Year: 2019, Volume: 26, Number:
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Abstract

In this study a total number of 22 organ samples (including trachea, lung and kidney) from 22 broiler farms from northern Upper Egypt were collected from Mars 2017 to June 2018 from chickens showing clear clinical and pathological signs of Infectious Bronchitis. The samples were prepared and examined by real time RT-PCR for diagnosis of IBV. A total number of 11 samples were positive (50%) which were used for further isolation on SPF eggs by three blind serial passages. Positive samples that showed the pathogenic lesions of IB (curling and dwarfing of embryos) were collected and tested with real time RT-PCR (rRT-PCR) for more confirmation then a part from S1 gene sequence was amplified by RT-PCR and the product was sequenced and the data have been compared with other related IBV strains. The results indicate that the Egyptian virus in this study has an identity percent reached up to 89% with other recent Egyptian isolates. However, it reached 67% with classical vaccine strains like H120 and variant I like CR88 strain. The lowest identity was observed with M41 strain (59%) in this study. The phylogenetic tree compared to other isolates from Middle East and worldwide showed that this isolate is related to the IBV variant 2 group closely related to IBVEg/1265B/2012 strain and the Israeli strain IS/1494/06.

Keywords: Molecular characterization, Genotyping, IBV, Egypt.
Factors affecting the immunogenicity of E. coli O78 vaccine in chickens

Factors affecting the immunogenicity of E. coli O78 vaccine in chickens

Authors: El-Seedy , F.R., Aml Mokhtar, Eman Khalifa, Sara Sayed
Year: 2019, Volume: 26, Number:
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Abstract

Bacterial disease still has serious problem in the intensive poultry production. In the recent years, particular concern has been raised by high incidence of poultry infections by E. coli. Analyses of antibacterial properties of essential oils have been carried out by range of researches. This experiment aimed to study the effect of immunomodulators on the immunogenicity of vaccine E. coli O78. In this study 250 broiler chickens were used. They were divided into 5 separated groups all groups vaccinated with E. coli O78 cebel coarse spray vaccine, except control group, 2 groups treated with immunomodulators, 3 groups challenged with untyped E. coli strain, all chickens housed in separated anavar. First group was control, 2nd group was vaccinated only, 3rd group was vaccinated and challenged, 4th group was vaccinated and received immunomodulators and 5th group was vaccinated, received immunomodulators and challenged. All chickens were observed daily food consumption, weight gained mortality rate, lesion, bioavailability, and weekly collected blood samples from 2-5 birds. The results were summarized as follows; immunomodulators have positive effect on B.W.G, decreased mortality and morbidity rate. The challenge enhanced the effect of E. coli O78 vaccine and there was marked improvement in bioavailability, B.W.G and immune defense against bacterial and respiratory diseases. Also, immunomodulators increased immunogenicity against bacterial disease through enhancing immune response system, and had synergistic effect with vaccination against E. coli.

Keywords: E. coli, Broiler chickens, Immunomodulators, E. coli vaccine, INF-γ, IL-6.
Antimicrobial patterns of Avian Pathogenic Escherichia coli isolated from
broiler chickens

Antimicrobial patterns of Avian Pathogenic Escherichia coli isolated from broiler chickens

Authors: Ismail A. Radwan, Sabry M. Tamam, Abeer A. El Sayed, Rania O. Qurani
Year: 2019, Volume: 26, Number:
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Abstract

E. coli infections in avian species are an economic threat to the poultry industry worldwide. The spread of MDR bacteria has been recognized as an increasing problem in the veterinary and medical fields. The current study aimed to investigate the phenotypic and genotypic antimicrobial patterns of avian Pathogenic E. coli isolated from broiler chickens. Results of in-vitro antimicrobial susceptibility testing showed that E. coli isolates were more sensitive to imipenem only (72.4%). On the other hand, they were highly resistant to most of used antimicrobials including ciprofloxacin (95.9%), amikacin (94.9%), cefotaxime sodium (92.9%), gentamicin (89.9%), cefotriaxone (89.9%), topramycin (87.8%), sulphamethoxazole/trimethoprime (85.7%), ceftazidim (84.7%). Also, they were resistant to cefoprazone (79.9%), doxycycline (72.4%) and amoxycillin/clavulinic acid (69.4%). All the tested isolates of E. coli (100%) were multi drug resistant (MDR). PCR was applied on 15 MDR E. coli isolates to determine 4 genes responsible for antibiotic resistance included ampC, blaCTX, blaSHV and tetA (A). The results revealed that that ampC and blaCTX genes were the most prevalent found in all isolates (100%) while tetA (A) and blaSHV genes were harbored in 14 isolates (93.3%)

Keywords: E. coli, broiler chickens, resistance genes, antimicrobial sensitivity. PCR.

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