• Title, Summary, Keyword: Salmonella

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Effect of Dietary Lactobacillus, Medicinal Plants Extract, Herb Extract on the Laying Performance, Cecal Microflora, Relative Organs Weight, Leucocyte Profiles in Laying Hens against Salmonella gallinarum (Salmonella gallinarum에 대한 Lactobacillus, Medicinal Plants Extract, Essential Oil 급여가 산란계의 생산성, 맹장 내 미생물 균총, 조직중량 및 백혈구 조성에 미치는 영향)

  • Kang, Hwan Ku;Park, Seong Bok;Kim, Hyun Soo;Jeon, Jin Joo;Park, Ki-Tae;Kim, Chan Ho;Hong, Eui Chul;Kim, Sang Ho
    • Korean Journal of Poultry Science
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    • v.45 no.3
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    • pp.183-191
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    • 2018
  • The study was conducted to investigate the effect of dietary supplementation of Lactobacillus, medicinal plants extract, and essential oil on laying performance, cecal microflora, relative organic weight, leucocyte profiles in laying hens against Salmonella gallinarum. A total of 100 Hy-Line Brown laying hens of 65 weeks of age were assigned into 5 dietary treatments supplemented with no antibiotic (negative control), antibiotic (positive control), Lactobacillus 0.1% (LB), medicinal plants extract 100 ppm (MPE), herb extract 100 ppm (EO). After 7 days of treatment, the 20 hens in each treatment group were divided into challenge group (n=10) and non-challenge group (n=10) for oral administration of Salmonella gallinarums, and were maintained in the same dietary treatments for two additional weeks. Laying hens were selected 20 by each treatment, splitting up into oral Salmonella group and nontreated group. The feeding trial lasted for one weeks and Salmonella gallinarum was orally administered for two weeks. Egg production, egg weight, egg mass, and feed conversion ratio were calculated and cecal microflora, relative organ, and blood were collected at the end of experiment. Compared with the control, laying hens fed Lactobacillus, medical plant extract, and essential oil were not observed to change of laying performance. Salmonella count increased significantly when Salmonella gallinarum was orally administered (P<0.05) but coliform bacteria and Lactobacillus counts were not affected. The relative organs weight was not different in hens with oral administration of Salmonella gallinarum and also in hens fed Lactobacillus, medical plant extract, and essential oil. H/L ratio was not significantly different, but total leucocyte level was somewhat increased in the treatment with oral administration of Salmonella gallinarum and more leucocyte increased in laying hens fed Lactobacillus, medical plant extract, and essential oil than control.

Identification of Secretion Signals of Target Proteins in Salmonella enterica serovar Typhimurium and Construction of Secretion Vector using this Signal (Salmonella enterica serovar Typhimurium에서 Type III 분비장치의 표적단백질들의 분비신호 확인 및 Type III 분비장치를 이용한 Secretion Vector의 개발)

  • Choi, Hyuk-Jin;Eom, Joon-Ho;Cho, Jung-Ah;Lee, Sun;Lee, Kyoung-Mi;Lee, In-Soo;Park, Yong-Keun
    • Korean Journal of Microbiology
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    • v.36 no.4
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    • pp.254-258
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    • 2000
  • Invasion process of bacterial cell into intestinal epithelium is important in Salmonella infection. The invasion is induced by the proteins secreted by type III secretion appratus of Salmonella. It has been known that the proteins do not have N-terminal signal peptide existing in general secreted proteins. Recent studies on Yersinia reported that secretion signal of type III appratus may lie on 5'end secondary structure of mRNA of secreted protein. In this study, we constructed translational fusion of ompR and sopE, encoding type III secretion protein of Salmonella, and observed secretion of the fusion protein for investigating the secretion signal of Salmonella type III appratus. The sopE DNA fragments of the translational fusion contain the region of promoter and from start code to tenth or to fifth code. These translational fusions indicate that type III secretion signal of Salmonella is located on 5'end of mRNA encoding secreted protein. We constructed prototype of secretion vector using this signal to produce useful foreign protein.

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Sanitizing Agent Effect and Antibiotic Resistance of Salmonella spp. Isolated from Raw Chicken Carcasses in Food Service (집단급식용 생계육에서 분리된 Salmonella의 항생체 내성과 위생 처리제의 영향)

  • Kang, Ji-Hyun;Lee, Young-Duck;Jung, Ki-Chang;Park, Jong-Hyun
    • Korean Journal of Food Science and Technology
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    • v.33 no.5
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    • pp.582-588
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    • 2001
  • To control the growth of Salmonella on raw chicken supplied in food service, they were isolated and analysed for their physiological characteristics. Total viable microbe counts under the skin of the chicken amounted to 10% of numbers on their skin. Fifty one of Salmonella were isolated and identified from 75 chicken carcass samples. About 70% of the isolates showed resistance to more than four antibiotics, which indicated very high resistance among the strains ever reported in Korea. Lactic acid and trisodium phosphate(TSP) as sanitizing agent were applied to the Salmonella spp. isolates by agar diffusion method. The resistance by isolates to those sanitizing agents was compared with type strains of S. typhimurium ATCC 14028, S. typhimurium ATCC 12023, S. heidelberg and S. enteritidis. The isolates showed similar or less resistance to the type strains as for the lactic acid. However, as for trisodium phosphate known recently as a good sanitizer, 50% of the isolates showed more resistant compared with the type strains. Also, the treatment time and regeneration medium affected significantly the resistance of the isolates, which indicates that more careful test might be needed for TSP's practical application to raw chicken. Therefore, From the results, it is suggested that antibiotic treatment during breeding broiler and contamination after slaughtering should be minimized along with careful use of sanitizing agent in order to ensure more safe raw chicken supply.

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Anaerobic Acid Tolerance Response in Salmonella typhimurium (Salmonella typhimurium의 혐기적 산내성도 평가)

  • Kim, Young-Chan;Lee, Sun;Lee, Kyung-Mi;Im, Sung-Young;Park, Yong-Geun;Baek, Hyung-Seok;Park, Kyung-Ryang;Lee, In-Soo
    • Journal of Life Science
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    • v.9 no.2
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    • pp.169-175
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    • 1999
  • Salmonella typhimurium can encounter a wide variety of environments during its life cycle. In nature, S. typhimurium can experience and survive dramatic acid stresses that occur in diverse ecological niches ranging from pond water to phagolysosomes. These survival mechanism is aquired by the Acid Tolerance Response(ATR) in Salmonella. The ATR of S. typhimurium is a complex inducible phenomenon in which exposures to slight or moderate low pH will produce a stress response capable of protecting the organism against more severe acid challenges. ATR in Salmonella has two different systems that are called RpoS dependent and independent. We found that ATR in anaerobic was showed RpoS independent because rpoS$\Omega$AP had ATR as S. typhimurium UK1. Using the P22 MudJ(Km, lacZ) operon fusion technique and a lethal selection procedure combining low pH(pH4.5) and sodium acetate(10mM, pH4.5), we isolated LF487 aatA::MudJ which showed acid sensitive in anaerobic condition. aatA locus was determined at 12 min on Salmonella Genetic Map. The survival rate of aatA mutant was showed significantly diminished at pH4.3 than virulent wild type Salmonella in anaerobic condition(5% $CO_2$, 5% H$_2$, 90% $N_2$). Therefore isolated gene was confirmed important gene for anaerobic ATR system.

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사멸 살모넬라와 뱅코마이신 첨가 사료가 Salmonella typhimurium 인공 감염 육계 병아리의 생산성과 면역 반응에 미치는 영향

  • Lee, Beom-Gyu;Im, Jin-Taek;Park, In-Gyeong;Choe, Do-Yeol;Choe, Jun-Yeong;Lee, Hye-Jeong;Go, Tae-Song
    • Proceedings of the Korea Society of Poultry Science Conference
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    • pp.76-77
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    • 2005
  • Effects of dietary killed salmonella and vancomycin on the performance and immune response was investigated in broiler chicks inoculated with Salmonella typhimurium. During 3 week(27 d) of age, experimental diet did not affect daily gain, feed intake and feed efficiency. Dietary killed salmonella and vancomycin decreased MnSOD activity. At 7day after Salmonella typhimurium inoculation, dietary killed salmonella and vancomycin increased, daily gain and feed efficiency of broiler chicks. At 7 and 15 day after salmonella inoculation, dietary killed salmonella and vancomycin decreased erythrocyte peroxidase activity, but elevated proliferation of PBMC stimulated with LPS and supernatant IL-1 level secreted by the PBMC. The results suggested that dietary killed salmonella and vancomycin improved the performance of broiler chicks due to modulate antioxidant system and innate immune response of broiler chicks innoculated with Salmonella typhimurium.

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Evaluation of the EF-18 Agar-Hydrophobic Grid Membrane Filter (HGMF) Method to Isolate Salmonella from Poultry Products

  • Rosa Capita;Astorga, Maite-Alvarez;Calleja, Carlos-Alonso;Maria del Camino;Garcia-Fernandez;Benito Moreno
    • Journal of Microbiology
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    • v.39 no.3
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    • pp.202-205
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    • 2001
  • The EF-18 agar/hydrophobic grid membrane filter (EF18/HGMF) method was evaluated for the isolation of Salmonella in naturally contaminated chicken carcasses, chicken parts (legs, wings and giblets) and processed chicken products (sausages and hamburgers). Percentages of false positive results for Salmonella (colonies with a similar morphology to those of Salmonella) were 78.75, 81.67 and 80% for carcasses, chicken parts and processed chicken products, respectively. The bacterial isolates that caused false positive reactions using this method were identified as Proteus mirabilis (70.85%), Citrobacter freundii (15.25%), Klebsiella ozaenae (5.83%), Hafnia alvei (4.48%), Escherichia coli (2.69%) and Enterobacter aerogenes (0.90%). The data obtained in this study suggest that the EF-18/HGMF method is not sufficiently selective or specific far isolating Salmonella from meat and chicken products.

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Specific detection of salmonella enteritidis using polymerase chain reaction method (PCR을 이용한 salmonella enteritidis의 특이적 검출)

  • 조미영;여용구;김영섭;이정학;이병동
    • Korean Journal of Veterinary Service
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    • v.23 no.3
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    • pp.227-233
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    • 2000
  • Salmonella enteritidis is the most prevalent etiologic agents of foodborne acute gastroenteritis. Direct isolation and identification of S enteritidis are time consuming work and not so highly sensitive. This study was conducted to develop for the specific detection of S enteritidis using polymerase chain reaction(PCR). PCR primers were selected to amplify a 351-base pair(bp) DNA fragment from the salmonella plasmid virulence A(spv A) gene of S enteritidis. With the primers, 351 bp DNA products were amplified from S enteritidis but not from other B, D, Cl serogroup Salmonella spp. It was sensitive to detect up to 40 pg of template DNA by agarose gel electrophoresis. This PCR assay is very rapid and specific method and less time consuming than the standard bacteriological methods.

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Assessment of the Effectiveness of a Natural Antimicrobial substance on Salmonella enteritidis using Response Surface Analysis (반응표면 분석을 이용한 Salmonella enteritidis의 증식 효능 평가)

  • 홍정미;정효준;이홍근
    • Journal of Environmental Science International
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    • v.11 no.12
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    • pp.1307-1313
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    • 2002
  • This study was performed to investigate the single and combined effect of concentrations of garlic juice according to the pH and temperature on the growth of Salmonella enteritidis in brain heart infusion broth, and to develope Response surface model for the effect of concentrations of garlic extract. The results of electric conductibility of Salmonella enteritidis growing in the range of incubation temperature ($25~42^{\circ}C$), pH (5.5~9.0) and concentration of garlic Juice (0~0.8%) showed that a badge with high temperature had low D.T.value and concentration of garlic extract were significantly correlated with D.T.value (p<0.01). Growth of Salmonella enteritidis in the condition of $37^{\circ}C$ and pH 7.0 presented the lowest D.T.value.

A Study on the Salmonella spp. isolation method in the sewage specimens (하수중의 Salmonella spp. 분리방법에 관한 비교연구)

  • 김성수;염종화
    • Journal of environmental and Sanitary engineering
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    • v.10 no.3
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    • pp.35-44
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    • 1995
  • This study was carried out in order to compare the methods for Salmonella spp. isolation from sewage and to settle the most appropriate conditions for that isolation. The direct enrichment method was more effective than the pre- enrichment method for Salmonella spp. isolation. The rate of detection was much higher when the specimens were enriched at $41.5^{\circ}C$ than when at $35^{\circ}C$. Usage of XLBG agar medium showed better results for Salmonella isolation than that of SS medium. It can be suggested that the most effective combination for Salmonella spp. isolation was the direct centrifugation(3,000 rpm 100m1)- direct enrichment($41.5^{\circ}$C)-usage of XLBG medium.

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Comparative Study on the Resistance of Three Commercial Strains and Balady (Local) Breed of Chickens to Infection With Salmonella gallinarum

  • Alshawabkeh, K.;Tabbaa, M.J.
    • Asian-Australasian Journal of Animal Sciences
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    • v.14 no.1
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    • pp.96-100
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    • 2001
  • Three commercial strains bred in the US (Hubbard), Holland (Lohman), and Canada (Shaver) and Balady breed of chickens were orally infected with $10^6$ cfu of Salmonella gallinarum per chick. Chicks were compared for weight gain, feed intake, feed conversion ratio, mortality rate and contamination of the liver, spleen and intestine with Salmonella gallinarum on the day of slaughter. The Balady chicks had significantly the lowest mortality rate (p<0.01) and weight gain (p<0.001) and poorest feed conversion ratio (p<0.001). Salmonella gallinarum could be shed from the liver, spleen and intestine with alternative rates in all strains. Lohman was the most resistance over the other two commercial strains, while Hubbard had the highest susceptibility. The Balady chicks were the most resistance. However, they may serve as a possible reservoir of Salmonella gallinarum and it may play a role of spreading the infection to the commercial farms in Jordan.