Preparation and Evaluation of Chemically Inactivated Salmonella Enteritidis Vaccine in Chickens

El-Safty, Mounir M.; Mahmoud, Hala; Zaki, Eman S. A.; Abd‐Alla, Howaida I.

doi:10.22159/ajpcr.2017.v10i11.20144

Cited by 3 publications

(3 citation statements)

References 25 publications

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“…Polimun Salmo vaccine developed from Salmonella strains containing immunogenic proteins of the outer membrane of S. gallinarum SG-15 and strains having F-proteins (flagella) and surface PNP lipids of S. typhimurium ST-15 and S. enteritiditis in the structure of the microbial cell 15. The bacterial mass of each strain was converted into protective antigens of formalinized and concentrated cultures of S. enteritidis, S. typhimurium and S. gallinarum with a concentration of each antigen of at least 8 billion microbial bodies in a single dose (El-Safty et al, 2017). Observations of the birds after vaccination showed that none of the immunized animals showed any adverse reactions such as abnormal behaviour, mortality, or signs of anorexia, depression, or diarrhea.…”

Section: Discussionmentioning

confidence: 99%

Immunogenicity and duration of immunity of the polyvalent vaccine against chicken salmonellosis

Сень

Saliy

Mazurkevych

et al. 2020

Regul. Mech. Biosyst.

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Poultry salmonellosis causes serious economic damage and must be prevented by disinfection, zoohygienic measures or by vaccination. To develop a new polyvalent vaccine against poultry salmonellosis, we used bacterial strains of Salmonella enteritidis, S. typhimurium and S. gallinarum. Antigenic and immunogenic efficacy of the vaccine was tested on specific-pathogen free chickens, which were divided into five groups of 10 birds in each group and were vaccinated intramuscularly at 8 and 12 weeks: group A (non-immunized control), group B (S. enteritidis mono-vaccine), group C (S. typhimurium mono-vaccine), group D (S. gallinarum mono-vaccine) and group E (trivalent vaccine Polimun Salmo). None of the immunized birds showed such adverse reactions as abnormal behaviour, mortality or signs of anorexia, depression or diarrhea. Two weeks after the revaccination, 5 birds in each group were challenged by watering 3 cm3 of working suspensions of S. gallinarum, S. typhimurium and S. enteritidis control strains at a concentration of 1 × 109 CFU. 72 h after the challenge, faeces were collected from all chickens in each group to identify Salmonella excretion with faeces, and the chickens were euthanized. Significant protection against the virulent challenge was observed in all immunized groups based on mortality and post-mortem lesions compared with the non-immunized control group. Blood samples were selected weekly from 5 chickens of each group for 184 days. The antigenic efficacy of the vaccines was studied by reaction of haemagglutination in the obtained serum. The potent antigen-specific response to lymphocyte activation found in all immunized groups indicated the induction of immune responses. Overall, the results showed that persistent immunity is formed in 4 weeks after the revaccination and lasts for a productive period. Immune response of chickens on day 184 after vaccination with Polimun Salmo was 1: 647, indicating that the developed polyvalent vaccine against common serovars of S. enterica in poultry is effective and immunogenic and can be further used in field studies.

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Section: Discussionmentioning

confidence: 99%

Immunogenicity and duration of immunity of the polyvalent vaccine against chicken salmonellosis

Сень

Saliy

Mazurkevych

et al. 2020

Regul. Mech. Biosyst.

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“…Other group of SPF-ECE S were inoculated with mixture of minimal cytotoxic concentration of different tested extract separately with each virus separately (0.2 mL per egg) for calculation of the antiviral inhibitory concentration fifty (IC 50 ). 27,28 Un-inoculated SPF eggs were always included as control of embryo. The eggs inoculated via allantoic cavity and were incubated for 6 days PI at 37ºC with humidity 60-80%.…”

Section: Inhibition Concentration and Therapeutic Indexmentioning

confidence: 99%

“…HI antibody was recorded in the control vaccinated group received the vaccine without receiving plant extract and other vaccinated treated groups which received the tested extracts separately. 27,28 Compliance with ethics requirements…”

Section: Evaluation Of Immune Boosting Properties Of Different Samplementioning

confidence: 99%

Evaluation of Immune Boosting Properties and Combating of Multiple Respiratory Viral Infections by fifteen Euphorbiaceae Plant Extracts

Abd‐Alla¹,

Sweelam²,

El‐Kashak³

et al. 2019

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Objective: Fifteen Euphorbiaceae plant extracts were evaluated for their antiviral and immune boosting properties. Methods: The maximum non-toxic concentration of each extract in specific pathogen-free embryonated chicken eggs was estimated and their antiviral efficacy was determined in terms of reduction in viral titers, measured by the hemagglutination inhibition (HI) assay. The antiviral efficacy was compared with ribavirin. The active extract was further subjected to estimation of total polyphenolic and flavonoid contents. Also, GC/ MS analysis was used to analyze its unsaponifiable and saponifiable matters. Results: The cytotoxic concentration fifty (CC 50 ) of Breynia distacha recorded the value of >200 and >300 for Newcastle disease virus (NDV) and avian influenza virus (AIV) H5N1, respectively. This extract showed antiviral inhibition concentration (IC 50 ) values of ≤ 2 and ≤ 3, respectively and antiviral therapeutic index of 100% compared with ribavirin as standard. The serum of the vaccinated chicks treated with B. distacha has recorded the highest HI titers (7.1 and 8.3 log2) at the day of 28 post vaccination with high protection percentage (100 and 90%) post NDV and AIV H5N1 challenge, respectively. Also, a high HI titer (6.9 log2) was recorded in serum of the vaccinated chicks treated with Aleurites moluccana, Jatropha curcas, Ricinus communis, Putranjiva roxburghii with protection percentage of 95-100% post-NDV challenge. GC/MS analysis allowed identification of 91.10% of the total unsaponifiable matter, (1-heptatriacotanol represented the major component, 24.61%) and 82.51% of the fatty acid methyl esters content (methyl palmitate represented the major component, 26.13 %). Conclusion: This study highlighted the potential of many Euphorbiaceae plants especially B. distacha, to be new candidate of plant-based prototypes that carry antiviral and immunogenic features against respiratory viral infections.has the potential of being more successful in its steps than screening of pure compounds isolated from the products. 8 The spurge family, Euphorbiaceae occupied a special place in the realm of plant families and is scientifically reported for its antiviral, antimicrobial, anticancer, cytotoxic, and antitumor activities. 9 In this respect, the present work aims to search for the use of plants of the Euphorbiaceae family to combat emerging infectious poultry diseases. Fifteen species belong to this family, are widely distributed and easily available throughout various geographical locations in Egypt, 10 were selected and subjected to evaluate their potential anti-viral activities against respiratory tract infection pathogens in specific pathogen-free (SPF) chicken embryos and evaluation of immune boosting properties of these substances in SPF chicks. These plant species are well known to have their traditional claims for cure and/or reduce symptoms of various disorders including infectious diseases of animal and human among folk cultures.

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Protective Immunity against Listeria monocytogenes in Rats, Provided by HCl- and NaOH-Induced Listeria monocytogenes Bacterial Ghosts (LMGs) as Vaccine Candidates

Moon

Noh

et al. 2022

IJMS

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Listeria monocytogenes (Lm) bacterial ghosts (LMGs) were produced by the minimum inhibitory concentration (MIC) of HCl, H2SO4, and NaOH. Acid and alkali effects on the LMGs were compared by in vitro and in vivo analyses. Scanning electron microscope showed that all chemicals form lysis pores on the Lm cell envelopes. Real-time qPCR revealed a complete absence of genomic DNA in HCl- and H2SO4-induced LMGs but not in NaOH-induced LMGs. HCl-, H2SO4- and NaOH-induced LMGs showed weaker or missing protein bands on SDS-PAGE gel when compared to wild-type Lm. Murine macrophages exposed to the HCl-induced LMGs showed higher cell viability than those exposed to NaOH-induced LMGs or wild-type Lm. The maximum level of cytokine expression (TNF-α, iNOS, IFN-γ, and IL-10 mRNA) was observed in the macrophages exposed to NaOH-induced LMGs, while that of IL-1β mRNA was observed in the macrophages exposed to HCl-induced LMGs. To investigate LMGs as a vaccine candidate, mice were divided into PBS buffer-injected, HCl- and NaOH-induced LMGs immunized groups. Mice vaccinated with HCl- and NOH-induced LMGs, respectively, significantly increased in specific IgG antibodies, bactericidal activities of serum, and CD4+ and CD8+ T-cell population. Antigenic Lm proteins reacted with antisera against HCl- and NOH-induced LMGs, respectively. Bacterial loads in HCl- and NaOH-induced LMGs immunized mice were significantly lower than PBS-injected mice after virulent Lm challenges. It suggested that vaccination with LMGs induces both humoral and cell-mediated immune responses and protects against virulent challenges.

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Preparation and Evaluation of Chemically Inactivated Salmonella Enteritidis Vaccine in Chickens

Cited by 3 publications

References 25 publications

Immunogenicity and duration of immunity of the polyvalent vaccine against chicken salmonellosis

Immunogenicity and duration of immunity of the polyvalent vaccine against chicken salmonellosis

Evaluation of Immune Boosting Properties and Combating of Multiple Respiratory Viral Infections by fifteen Euphorbiaceae Plant Extracts

Protective Immunity against Listeria monocytogenes in Rats, Provided by HCl- and NaOH-Induced Listeria monocytogenes Bacterial Ghosts (LMGs) as Vaccine Candidates

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