나트륨 염 복합조성물의 마우스 살모넬라증에 대한 항균 및 치료효과

이여은,이후장,차춘남,박은기,김석 한국식품위생안전성학회 2011 한국식품위생안전성학회지 Vol.26 No.3

Salmonellosis is a major bacterial zoonosis that causes self-limited enteritis to fatal infection in animals and food-borne infection and typhoid fever in humans. Multidrug-resistant strains of Salmonella spp. has increased over the last several decades and recently causes more serious problems in public health. The present study was investigated bacteriocidal effects of sodium chlorate, sodium azide, sodium cyanide, and sodium salts mixture containing sodium chlorate, sodium azide, and sodium cyanide on infection with S. typhimurium in macrophage RAW 264.7 cells, and antibacterial effects of sodium salts mixture for murine salmonellosis. In infection assay of S. typhimurium in RAW 264.7 cells, bacterial survival rates within macrophage in all treated groups was significantly reduced comparing to that of the control group with the passage of incubation time. Administration of sodium salts mixture showed a therapeutic effect for S. typhimurium infected ICR mice. The mortality of mice treated with sodium salts mixture was 70% until 12 days, while that of control mice was 100% until 9 days after S. typhimurium infection. The results of this study strongly indicate that sodium salts mixture has a potency treatment for murine salmonellosis.

인공해수 유도용액측의 유기파울런트 영향에 따른 정삼투 막오염 평가

이여은,고경완,오정환,고정호,이선우,장암 대한환경공학회 2015 대한환경공학회 학술발표논문집 Vol.2015 No.10

복합나트륨염의 Salmonella gallinarum 감염 육계에 대한 치료효과

이여은,차춘남,손송이,유창열,박은기,김석,이후장 한국임상수의학회 2013 한국임상수의학회지 Vol.30 No.1

The objectives in the present study were to evaluate the therapeutic effect of a sodium salts mixture against Salmonella gallinarum infection in broiler. Of this study, sixty broilers at two weeks of age (body weight, 450 ± 35 g)were used to estimate the efficacy of a sodium salts mixture (3.25 mg sodium azide, 2.45 mg sodium cyanide, 0.8 g sodium chlorate) against Salmonella gallinarum infection in broiler with drinking water. Broilers challenged with S. gallinarum were administered with × 1(group I) and × 2(group II) sodium salt mixture for seven days, and cecal content samples were collected at the gate of treatment and on 1st, 3rd, 5th, and 7th day after administration. Changes in body weight and cecal shedding of S. gallinarum were monitored during the experimental period. All groups treated with the sodium salt mixture slightly increased body weight compared to control group but there is no significant difference. At 7th day after administration, the number of S. gallinarum in group I and II was significantly decreased compared to control group (p < 0.001). In the hematological and blood biochemical analysis, values of parameters were not significantly different between the treated groups and control group. From results of the present study, the sodium salt mixture had therapeutic effect on S. gallinarum infection in broilers.

Effect of feeding the combination with Lactobacillus plantarum and Bacillus subtilis on fecal microflora and diarrhea incidence of Korean native calves

이여은,강인진,유은아,김숙,이후장 한국동물위생학회 2012 韓國家畜衛生學會誌 Vol.35 No.4

This study was investigated the effects of feeding the combination with Lactobacillus plantarum and Bacillus subtilis on the diarrhea incidence and fecal microflora of weaned calves. A total of 12 newly weaned calves were allocated to two dietary treatments in a randomized design based on body weight. The dietary treatments included a commercial basal diet supplemented with: 1) no microbial inoculants (Control); 2) a mixture of Lactobacillus plantarum and Bacillus subtilis (LB). Calves were fed diets for a 4-week period. At the end of the experiment, the counts of fecal lactic acid bacteria and Enterobacteriaceae in LB were significantly improved compared to control (P<0.05). Over the 4-week period, fecal scores and duration of diarrhea in LB were significantly decreased compared with those in control (P<0.05). The present results suggest that LB is a potential feed additive which could be used for the balance of intestinal microflora and the prevention of diarrhea in Korean native calves.

Efficiency of a Lactobacillus plantarum-Bacillus subtilis Combination on Growth Performance and Fecal Microflora Populations of Broiler Chickens

차춘남,이여은,강인진,김석,최현주,이후장 경상대학교 농업생명과학연구원 2012 농업생명과학연구 Vol.46 No.5

A study was investigated the effects of the probiotic mixture (PM) contained Lactobacillus plantarum (L. plantarum) SY-99 2.4×109 CFU/kg and Bacillus subtilis (B. subtilis) SJ-61 2.2×109 CFU/kg on growth performance and fecal microflora counts of broiler chickens. Referred to the previous studies, a total of 160 one-day-old male broiler chicken (Ross 308) were randomly assigned to four experimental groups, which were a basal diet alone (control) and supplemented with PM 0.1 g/kg feed (T1), PM 0.2 g/kg feed (T2), and PM 0.4 g/kg feed (T3). After 28 days of administration, the average daily feed intake of T1 and T3 was significantly different compared to that of control (p<0.05). In addition, the feed conversion ratio of T2 and T3 was significantly improved compared to that of control (p<0.05). On the 28th day after administration, all treatment groups were significantly increased fecal lactic acid bacteria (LAB) counts and decreased fecal Enterobacteriaceae (ENT) counts compared to T1 (p<0.05). The results of this study indicated that the combination of L. plantarum and B. subtilis strains in the range of 0.2-0.4 g/kg feed could be used for the improvement of growth performance and fecal microflora in broiler chickens.

염화벤지코늄과 구연산을 주성분으로 하는 살균 소독제 라미아-킬에 대한 급성경구독성 및 피부자극성 시험에 관한 연구

차춘남,이여은,손송이,유창열,박은기,최현주,김석,이후장,Cha, Chun-Nam,Lee, Yeo-Eun,Son, Song-Ee,Yoo, Chang-Yeol,Park, Eun-Kee,Choi, Hyun-Ju,Kim, Suk,Lee, Hu-Jang 한국식품위생안전성학회 2011 한국식품위생안전성학회지 Vol.26 No.4

살균소독제, 라미아-킬(benzalkonium chloride(20%), citric acid(20%))에 대하여 랫드와 토끼를 이용하여 급성경구독 성과 피부 자극성 평가를 각각 수행하였다. 랫드에 라미아-킬 2,000 mg/kg 농도를 최고농도로 하여 단회 투여 후, 14일간 관찰한 결과, 사망, 이상증상 및 체 중변화 등은 관찰되지 않아, 라미아-킬의 $LD_{50}$은 2,000 mg/kg 이상으로 추정되었다. 토끼의 등 부위의 털을 제거하고 찰과부위와 비찰과 부위에 여러 농도로 라미아-킬을 도포 한 후, 피부 자극성을 확인한 결과, 라미아-킬의 l차 자극 지수가 0.50으로 비자극성 물질로 분류되었다. 따라서, 본 연구를 통하여, 라미아-킬은 급성경구독성 시 안전한 물질이며, 피부 자극성을 야기하지 않는 물질로 평가되었다. This test was performed to evaluate the acute oral toxicity and skin irritation of Lamia-Kill$^{(R)}$, disinfectant, containing 20% benzalkonium chloride and 10% citric acid. In acute oral toxicity, Lamia-Kill$^{(R)}$ was orally administered at dose levels of 2,000, 1,000, 500, 250 and 0 mg/kg body weight. After single oral administration to both sexes of SD rats, the rats were observed for 14 days. In primary skin irritation test, New Zealand white rabbits were dermally treated with Lamia-Kill$^{(R)}$ for 24 hr and observed for 3 days. All rats treated with Lamia-Kill$^{(R)}$ were induced no toxic signs in mortalities, clinical findings, body weights and gross findings. Also, the disinfectant did not induce any adverse reactions such as erythema and edema on intact skin sites for the most part rabbits, but on abraded skin sites, some rabbits showed very slight erythema on 24 hr after topical application. With the results of this study, Lamia-Kill$^{(R)}$ have no effect on acute toxicity and side effect in SD rats and was classified as a practically non-irritating material based on the score 0.50 of primary irritation index.

염화벤자코늄과 구연산을 주성분으로 하는 살균 소독제 라미아-킬에 대한 급성경구독성 및 피부자극성 시험에 관한 연구

차춘남,이후장,이여은,손송이,유창열,박은기,최현주,김석 한국식품위생안전성학회 2011 한국식품위생안전성학회지 Vol.26 No.4

This test was performed to evaluate the acute oral toxicity and skin irritation of Lamia-Kill®, disinfectant,containing 20% benzalkonium chloride and 10% citric acid. In acute oral toxicity, Lamia-Kill® was orally administered at dose levels of 2,000, 1,000, 500, 250 and 0 mg/kg body weight. After single oral administration to both sexes of SD rats, the rats were observed for 14 days. In primary skin irritation test, New Zealand white rabbits were dermally treated with Lamia-Kill® for 24 hr and observed for 3 days. All rats treated with Lamia-Kill® were induced no toxic signs in mortalities, clinical findings, body weights and gross findings. Also, the disinfectant did not induce any adverse reactions such as erythema and edema on intact skin sites for the most part rabbits, but on abraded skin sites, some rabbits showed very slight erythema on 24 hr after topical application. With the results of this study,Lamia-Kill® have no effect on acute toxicity and side effect in SD rats and was classified as a practically non-irritating material based on the score 0.50 of primary irritation index.

Escherichia coli O157:H7에 감염된 마우스에 대한 염소산나트륨과 한약재 복합추출물 합제의 항균효과

차춘남,이후장,이여은,손송이,박은기,최현주,김석 한국식품위생안전성학회 2012 한국식품위생안전성학회지 Vol.27 No.1

The present study was evaluated the antibacterial effect of the combination of Coptidis rhizoma,Glycyrrhiza uralensis Fischet, Schizandra chinensis and Corni Fructus(1:1:1) extracts(CGSC10). Furthermore, the effectiveness of CGSC10, sodium chlorate, and the combination of CGSC10 and sodium chlorate(CGSCS10) against E. coli O157:H7 infection was studied using ICR female mice. During the incubation period, the dose of 5, 10, and 20% CGSC10 was inhibited the growth of E. coli O157:H7 by 34.7, 60.2, and 76.4%, respectively. For 7 days after single challenge with E. coli O157:H7, forty female ICR mice were divided into four experimental groups which were administered in drinking water with saline, 10% CGSC10, 15 mM sodium chlorate, and CGSCS10, respectively. On the 3rd day, the number of E. coli O157:H7 in mouse feces was significantly decreased by administration of CGSC10,15 mM sodium chlorate, and CGSCS10 (p < 0.001). On the 7th day-after administration, CGSC10, sodium chlorate,and CGSCS10 were decreased the number of E. coli O157:H7 by 27.1, 67.7, and 83.3%, respectively. According to the results of the present study, administration of CGSCS10 to mice can reduce the severity of E. coli O157:H7 infection. In addition, it is suggested that CGSCS10 represents a good candidate for the treatment of enteric infections in domestic animals.

Antimicrobial Efficacy of the Disinfectant Solution Nanoxil® Against Fish Pathogenic Bacteria

차춘남,정원철,이여은,유창열,김석,이후장 한국환경보건학회 2010 한국환경보건학회지 Vol.36 No.6

Fish pathogenic bacteria are a considerable danger of farmed fish and a source of economic loss in the fish farming industry. In this study, Nanoxil® was compared to hydrogen peroxide and a silver colloid in terms of disinfection efficacy against E. tarda, V. anguillarum and S. iniae. A bactericidal efficacy test conducted by a broth dilution method was used to determine the lowest effective dilution of the disinfectant following exposure to test bacteria for 30 min at 4oC. Nanoxil® and test bacteria were diluted with distilled water (DW), hard water (HW) or an organic matter suspension (OM) according to the treatment condition. Under the OM condition, the bactericidal activity of Nanoxil® against E. tarda exhibited a lowered efficacy compared to that under the DW and HW conditions. Nanoxil® at 500 fold under all of the conditions demonstrated a high bactericidal efficacy against S. iniae. As Nanoxil® possess bactericidal efficacy against fish pathogenic bacteria such as E. tarda, V. anguillarum and S. iniae,this disinfectant solution can be used to limit the spread of fish bacterial diseases.

Anticoccidial Efficacy of Coccimuel-S composed with Diclazuril on Experimental and Field Coccidiosis in Broiler Chickens

차춘남,손송이,김석,이여은,유창열,박은기,이후장 한국임상수의학회 2012 한국임상수의학회지 Vol.29 No.2

The efficacy of water soluble formulation of diclazuril (Coccimuel-S 0.5%) was tested against Eimeria spp. infection broiler chickens. The experiment was performed both experimentally infection and in the field test. Coccimuel-S composed with diclazuril induced a marked inhibitory effect on the different stages of Eimeria life cycle in experimentally infected broiler chickens treated with the drug. The tested dosage levels of Coccimuel-S (0.5 ml/L,equivalent to diclazuril 2.5 ppm) in drinking water showed the significant effect compared with the control group in controlling coccidial infection and reducing the total oocyst numbers, lesion and fecal scores (p < 0.001). In addition,testing of Coccimuel-S (0.25 and 0.5 ml/L) in naturally infected poultry farms (1,200 broiler chickens), showed the significant anticoccidial effect compared to control (p < 0.001). In conclusion, addition of Coccimuel-S at the dose of 0.25 and 0.5 ml/L in the drinking water, induced efficacious effect for the treatment of coccidiosis in naturally coccidia infected broiler chickens.