• Korean Journal of Food Science and Technology
• /
• v.52 no.6
• /
• pp.678-684
• /
• 2020

The objective of this study was to identify the fermentation characteristics of Bacillus thuringiensis and emetic, non-emetic Bacillus cereus using analytical profile index (API) test. Ten strains of B. thuringiensis and 10 strains of B. cereus including 3 strains of emetic type were used at the same concentrations. The differences of fermentation characteristics between the B. thuringiensis and B. cereus was not obvious, but the differences between the non-emetic and emetic B. cereus were distinctive. Seven among 50 substrates were negative for all non-emetic B. cereus strains and positive for all emetic strains, and three substrates among additional 12 substrates had the same tendency. From these differences, 3 emetic B. cereus strains were not indicated as B. cereus by API test. These results indicate that API test is not a suitable method to identify some strains of emetic B. cereus, and the distinctive differences in substrate utilization can be used to improve selective media.

• Korean Journal of Veterinary Research
• /
• v.32 no.3
• /
• pp.341-345
• /
• 1992

The tuber of Pinellia ternata Breitenbach(Araceae), which is distributed in Korea, China, and Japan, has been used in traditional Chinese medicine. The prescription containing Pinellia tuber shows anti-emetic, sedative, and anti-tussive effects. The purpose of this study was to investigate the effects of Pinellia ternata tuber on the xylazine-induced emetic and sedative responses in cats. The results were as follows ; 1. Intramuscular injection of xylazine hydrochloride(1.0mg/kg) reliably evoked vomiting with an incidence of 100% and sedated with a mean sedation time of 34.22 min. 2. The xylazine-induced emetic and sedative responses were not prevented by oral administration of powder (0.5g/head), decoction ($1.0m{\ell}/100g$), and methanol extract ($0.1m{\ell}/100g$) of the Pinellia ternata tuber. 3. The xylazine-induced emetic and sedative responses were inhibited by intravenous injection of decoction($0.3m{\ell}/100g$) of the Pinellia ternata tuber. 4. The xylazine-induced emetic and sedative responses were inhibited by intravenous injection of a combined mixture of yohimbine hydrochloride(0.125mg/kg) and 4-aminopyride(0.3mg/kg).

• Toxicological Research
• /
• v.17 no.2
• /
• pp.159-161
• /
• 2001

The anti-emetic effect of a 5-HT$_3$ receptor antagonist, Ondaron, was compared with that of the approved ondansetron agent, Zofran$\circledR$ in the ferrets. Emesis was induced by single intraperitoneal injection of cisplatin 10 mg/kg, and Ondaron or Zofran$\circledR$ was injected intraperitoneally in a dose of 1.0 mg/kg, respectively. Ondaron and Zofran$\circledR$ effectively antagonised the emetic response for 4 hours after injection. They significantly reduced the number of vomiting and retching, and prolonged the latency to the first episode. The anti-emetic effect of Ondaron was almost the equal to that of Zofran$\circledR$. These results suggest that Ondaron is an effective anti-emetic agent against cisplatin-induced emesis, and its anti-emetic potency is similar to that of 5-$HT_3$ receptor abtagonist, Zofran$\circledR$.

• Korean Journal of Food Science and Technology
• /
• v.53 no.6
• /
• pp.815-818
• /
• 2021

The objective of this study was to develop a differential medium with improved selectivity for the isolation of Bacillus cereus. Mannitol egg yolk polymyxin medium supplemented with D-galactose allowed the differentiation of diarrheal- and emetic-type B. cereus through pH monitoring. The pH of the medium decreased significantly when incubating the emetic-type B. cereus, whereas the pH change was not significant when incubating the diarrheal-type. The addition of pH indicators, such as methyl red and phenol red, to the medium allowed visual differentiation between diarrheal- and emetic-type B. cereus. A solid agar medium was also developed by optimizing the concentrations of medium components such as monosaccharides, agar, egg yolk enrichment, pH indicators, and antibiotics. This study indicates the possibility of applying selective media for the differentiation of diarrheal- and emetic-type B. cereus.

• Journal of Microbiology and Biotechnology
• /
• v.20 no.7
• /
• pp.1107-1113
• /
• 2010

Because conventional methods for detecting emetic-toxin-producing B. cereus are laborious and costly, various PCR assays, which are easy and cheap, have recently been reported. Therefore, this study estimated and compared the ability of various PCR assays to detect emetic-toxin-producing B. cereus strains isolated in Korea. The PCR assays were performed on 160 B. cereus strains, including 40 emetic-toxin-producing strains. Although the species-specific PCR assays were all shown to be highly specific, the sensitivities varied greatly. The accuracies of the primers were 97.5% (CER), 95.6% (EM1), 96.3% (RE234), 89.4% (CES), and 83.1% (Ces3R/CESR2). Moreover, the CER primer had a higher sensitivity (100%) than all the other primers tested, and a specificity of 96.7%. Thus, the CER primer was shown to be the most effective for screening the emetic-toxin-producing B. cereus strains tested in this study. However, the ability of these PCR assays to identify emetic-toxin-producing B. cereus should also be confirmed using other methods.

• Natural Product Sciences
• /
• v.5 no.1
• /
• pp.20-24
• /
• 1999

Bioassay-guided fractionation of anti-emetic constituents of Alpinia katsumadai Hayata was performed. Nine compounds including one novel compound, (3R,5S)-trans-3,5-dihydroxy-1,7-diphenyl-1-heptene (9) were isolated from it. Among these compounds, four diarylheptanoids, one sesquiterpenoid and one flavonoid showed anti-emetic activity on copper sulfate induced-emesis in young chicks.

• Natural Product Sciences
• /
• v.4 no.2
• /
• pp.72-77
• /
• 1998

The new assay method was developed by using young chicks instead of frogs for screening of anti-emetic compounds from natural sources. Comparing with our previous method using leopard and ranid frogs, the advantages of the new method were not only completely parallel results but also decreasing standard errors. Hinesol and eudesmol were isolated from MeOH extract of Atractylodes lancea rhizome as the anti-emetic principles.

• Food Science and Biotechnology
• /
• v.17 no.4
• /
• pp.761-765
• /
• 2008

Bacillus cereus causes two different types of food poisoning syndromes: diarrhea and emesis. The diarrheal syndrome is attributed to various enterotoxins, including nonhemolytic enterotoxin, hemolytic enterotoxin, and enterotoxin-T, whereas the emetic syndrome is caused by the dodecadepsipeptide toxin cereulide. A multiplex polymerase chain reaction (PCR) assay was developed to rapidly detect and identify B. cereus strains. Three primer pairs specific to regions within genes encoding nonhemolytic enterotoxin (nheA), molecular chaperonin (groEL), and cereulide synthetase (ces) were used to identify and differentiate between the enterotoxin-producing and emetic toxin-producing B. cereus strains. The cereulide-producing emetic B. cereus showed 3 PCR products of 325, 405, and 685 bp for the groEL, ces, and nheA genes, respectively, whereas the enterotoxin-producing B. cereus showed 2 PCR products without a ces gene specific DNA fragment. Specific amplifications and differentiations by multiplex PCR assay were obtained using 62 B. cereus strains and 13 strains' of other bacterial species. The detection limit of this assay for enterotoxin-producing strain and emetic toxin-producing strain from pure cultures were $2.4{\times}10^1$ and $6.0{\times}10^2\;CFU/tube$, respectively. These results suggest that our multiplex PCR method may be useful for the rapid detection and differentiation of B. cereus strains in foods.

• Korean Journal of Radiology
• /
• v.21 no.10
• /
• pp.1178-1186
• /
• 2020

Objective: To evaluate the incidence and risk factors of emetic complications associated with the intravenous administration of low-osmolality iodinated contrast media (ICM) in children undergoing computed tomography (CT). Materials and Methods: All children who underwent contrast-enhanced CT between April 2017 and July 2019 were included. Pediatric patients were instructed on the preparative dietary protocol at our institution. Experienced nurses in the radiology department monitored the children during the CT scans and recorded any emetic complications in their electronic medical records. These data were used to calculate the incidence of emetic complications. Various patient factors and technical factors, including fasting duration, the type and volume of ICM, and ongoing chemotherapy, were evaluated to identify risk factors for emetic complications using univariate and multivariate logistic regression analyses. Results: Among the 864 children (mean age, 8.4 ± 5.7 years) evaluated, 18 (2.1%) experienced emetic complications (6 experienced nausea only and 12 experienced nausea and vomiting). None of the children developed aspiration pneumonia. The mean fasting duration of patients with emesis was 7.9 ± 5.7 hours (range, 3-21 hours), whereas that of patients without nausea was 8.7 ± 5.7 hours (range, 0-24 hours). Fasting duration was not associated with the development of nausea and vomiting (p = 0.634). Multivariate logistic regression analysis revealed that ongoing chemotherapy (odds ratio [OR] = 4.323; 95% confidence interval [CI] = 1.430-13.064; p = 0.009), iomeprol use (OR = 7.219; 95% CI = 1.442-36.146; p = 0.016), and iohexol use (OR = 5.241; 95% CI = 1.350-20.346; p = 0.017) were independent risk factors for emetic complications. Conclusion: Only a small proportion (2.1%) of children experienced nausea or vomiting after exposure to low-osmolality ICM. Many children underwent excessive fasting; however, fasting duration was not associated with nausea and vomiting. Moreover, ongoing chemotherapy and the use of iomeprol or iohexol were identified as potential risk factors for emetic complications in children.

• Journal of the FoodService Safety
• /
• v.1 no.1
• /
• pp.9-18
• /
• 2020

B. cereus-produced cereulide as an emetic toxin is commonly isolated in starch-based cooked foods. This study examined the prevalence of B. cereus from ready-to-eat foods in markets by polymerase chain reaction analysis and determined the relationship between the level of B. cereus and the quantity of cereulide in the sample after different storage times and temperatures. The prevalence of general B. cereus in 43 starch foods was 32.6%, and the level of B. cereus ranged from 0.5 to 1.95 log cfu/g, meeting the Korea Food Code Specifications of 3 log CFU/g of B. cereus. No samples revealed emetic B. cereus. Fried rice samples were inoculated with a cereulide-producing reference strain, B. cereus NCCP 14796, to determine the level of B. cereus and the quantity of cereulide in the samples after storage for 0, 4, 6, 8, 20, 24, 30, 48, 72, and 96 h at 7, 25, 35, and 57℃. The average levels of B. cereus at 7, 25, 35, and 57℃ were 4.38, 7.31, 7.88, and 3.82 log cfu/g, and the levels of cereulide were 150.41, 1680.70, 2652.65, and 77.83 ㎍/mL, respectively, showing a significant difference according to the incubation time (P<0.05) and temperature (P<0.001).