• 한국동물위생학회지
• /
• 제14권1호
• /
• pp.41-48
• /
• 1991

Bordetella bronchiseptica were isolated from nasal swabs of the pigs being raised in Eastern Gyeong Nam area from September to December, 1990. Servey on isolation frequency, antimicrobial susceptibility and serum agglutination antibody titer were carried out. The results obtained were summarized as follows : 1. Isolation of B. bronchiseptica were 47 pigs in 113, shown 41.6% of isolation rate and isolation rate were higher in non-vaccination group(60.0%) than vaccination group(28.8%), 2. Isolation rate by ages were the lowest below 1 week ages(22.2%), the highest in 78 weeks ages(55.6 %) and sows was shown 39.3%. 3. It was also found that 47 strains of B. bronchiseptica isolated were highly susceptibility to minocyclin, gentamicin, neomycin, colistin and kanamycin, and highly resistant to penicillin, linsmycin, bacitracin, sulphonamides and chloramphenicol. 4. Isolation rate by the difference of seum agglutination antibody titer were more high at low agglutination titer than high agglutination titer.

• Clinical and Experimental Reproductive Medicine
• /
• 제10권1호
• /
• pp.25-37
• /
• 1983

A group of 180 men who visited Urology Department of Severance hospital, including 115 patients with nongonococcal urethritis (N.G.U.), 27 patients with prostatitis, 13 patients with gonococcal urethritis (G.U.) and 25 healthy medical student controls were investigated for the isolation of Ureaplasma urealyticum (T-strain mycoplasma) from the specimen of ureaplasma discharge, urine and semen. Taylor-Robinson media of T-broth and T-agar was used for the isolation of Ureaplasma urealyticum. To the best of our knowledge, the study on the culture of Ureaplasma urealy ticum was reported for the first time in Korea. The followis g results were obtained: 1. The isolation rate of Ureaplasma urealyticum in nongonococcal urethritis (53.0%) revealed highest of those in the other three groups of prostatitis, gonococcal urethritis and control (40.7%,38.4% and 16.0% respectively). 2. As for the specimens, urethral discharge revelaed higher isolation rate of Ureaplasma urealyticum (54.6%) than first voided urine (50.0%). 3. The more consorts patients had, the higher positive culture rate of Ureaplasma urealyticum were revealed. The isolation rate in case of more than one causal in nongonococcal urethritis (27.8%) revealed much higher than in case of marital only (5.2%), one regular (6.1%) and one causal 03.9%). 4. 2.6% of isolation rate of Ureaplasma urealyticum revealed in patients with nongonococcal urethritis who visited the clinic in later than 4 weeks after the symptoms developed. However, the isolation rate in patients who visited within 4 weeks revealed 50.3%. The lower isolation rate of Ureaplasma in the late treatment seekers might be probably due to the suppression effect against Ureaplama urealyticum from the possible previous self antibiotic treatment. 5. Attachment of Ureaplasma urealyticum mostly to the neck and head portion of the spermatozoa seemed to playa role to affect the motility of sperms.

• 한국동물위생학회지
• /
• 제22권3호
• /
• pp.213-220
• /
• 1999

In order to investigate the prevalence of Salmonella spp. from 1992 to 1997 in Inchon, 173 strains of Salmonella spp. were isolated from patients with diarrhea and analyzed them epidemiologically. The results obtained were as follows; 1. The yearly isolation rates were 34.68% (60 strains) in 1996, 20.80%(36 strains) in 1994, 18.50%(32strains) in 1997, 10.40%(18 strains) in 1992 and 9.83%(17 strains) in 1995 and 5.78%(10 strains) in 1993, in order. 2. The isolation rates based on specimen were 84.97%(147 strains) from feces, 14.45%(25 strains) from blood and 0.58%(1 strain) from pus. 3. The highest isolation rate based on age group was at twenties(25.43%) and four-ties(19.65%), fifties(19.08%), teens(15.03%) and thirties(10.98%), in order. 4. Based on the regional distribution, Nam-gu showed the highest isolation rate (20.80%) and followed by Namdong-gu(20.23%), Dong-gu(19.65%) and Yeansu-gu(0.58%), in order 5. Seasonally, the highest isolation rate was from May to September during the investigation. 6. The isolation rate in male(58.96%) was higher than that in female(41.04%).

• 대한전기학회논문지:전력기술부문A
• /
• 제53권10호
• /
• pp.550-555
• /
• 2004

Fault section isolation and service restoration are very important for function of DAS. In Japan, a progressive protection method is used for the line to ground fault section isolation and service restoration. But the progressive protection method has a drawback that the customer will experience outage time and that the rate in use of the feeder is not over 50%. This paper presents a new Service Restoration Algorithm which is for the line to ground fault section isolation and service restoration method for a ungrounded distribution system. If the proposed algorithm is used, the rate in use of the feeder can improve than before because a distribution system can change multi connection of feeder and the customer's outage time can be reduced. The proposed algorithm has been successfully tested in a distribution system.

• Earthquakes and Structures
• /
• 제26권5호
• /
• pp.337-348
• /
• 2024

This paper presents a new seismic isolation design for liquid storage tank (LST). The seismic isolation system includes: LST, flexible membrane, sand mat and rolling seismic isolation devices. Based on the mechanical equilibrium theory, the symmetric concave rolling restoring force model of the isolation device is derived. Based on the elasticity theory and restoring force model of the seismic isolation, a simplified mechanical model of LST with the new seismic isolation is established. The rationality of the seismic isolation design of LST is explored. Meanwhile, the seismic response of the new seismic isolation LST is investigated by numerical simulation. The results show that the new seismic isolation tank can effectively reduce the seismic response, especially the control of base shear and overturning moment, which greatly reduces the risk of seismic damage. The seismic reduction rate of the new seismic isolation storage tanks in Class I, II, and III sites is better than that in Class IV sites. Moreover, the seismic isolation device can effectively control the ground vibration response of storage tanks with different liquid heights. The new seismic isolation LST design provides better isolation for slender LSTs than for broad LSTs.

• 한국식품영양학회지
• /
• 제16권2호
• /
• pp.111-115
• /
• 2003

총 2429건의 시판 수산물에서 296건의 E. coli가 분리되어 평균 12.2%의 분리율을 보였다. 대장균은 연중 분리되나, 하절기 특히 8, 9월에 가장 높은 분리율을 보였다. 어종별 대장균 분리율은 갑각류 15.6%, 연체류 14.4%, 패류 12.0%, 어류 11.0%로 나타나 어종간의 분리율 차이는 크지 않은 것으로 나타났다. 그러나 패류의 경우는 평균 대장균 분리율은 12.0%이지만, 비탈 각패류에서는 6.8%, 탈각패류에서는 16.3%의 분리율을 보여 큰 차이가 있었다. 지역별로는 경남산 어패류에서 대장균 분리율이 14.3%로 높게 나타났고, 제주는 6.9%로 낮은 분리율을 보였다. Tetracycline 및 $\beta$-lactam계 항생제에 대한 내성은 비교적 높았던 반면, chloramphenicol과 aminoglycoside계 항생제에 대한 내성은 전혀 없거나 아주 낮은 빈도로 출현하였으며 다제내성주의 빈도는 35.1%로 임상분리주에서 보다 낮게 나타났다.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
• /
• 제20권1호
• /
• pp.7-14
• /
• 2014

Purpose: In this study, we performed ventilation simulations for a standard isolation ward including three intensive care rooms, one anteroom(buffer room), and its recommended ventilation equipments. The purpose of this study is to predict outflow of pathogenic bacteria from patient breath to verify the reliability and the safety of the isolation ward. Methods: We suppose three scenarios of the movement of medical staff. The leakage of patient's breath to out of the ward is predicted in these scenarios using CFD simulations. Results: The patient's breath leakage rate to out of the ward in scenario 1 according to room air changes per hour(ACH : 6 and 12) is predicted to be 0.000057% and 0.00002%, respectively. The patient's breath leakage rate to out of the ward in scenario 2 according to room air changes(ACH : 6 and 12) is predicted to be 0.00063% and 0.00019%, respectively. The patient's breath leakage rate to out of the ward in scenario 3, which is the worst case(6 room air changes) is predicted to be 0.1%. Implications: Through the ventilation simulation like that in this study, the reliability and the safety on isolation performance of various plan of isolation ward are predicted quantitatively.

• 대한임상검사과학회지
• /
• 제39권2호
• /
• pp.76-85
• /
• 2007

The total number of clinical materials collected from Dec 1, 2005 to Nov 30, 2006 in C. hospital was 63,133. Among these materials, the isolation of Staphylococcus spp. was 5,252 strains. The proportions of Staphylococcus species infection were as follows ; 46.7% in S. aureus, 39.3% in S. epidermidis, 4.7% in S. hominis, 3.8% in S. haemolyticus, 2.9% in S. capitis and 2.5% in others. Seventeen strains of Staphylococcus species were identified with an isolation range of 0.02-46.7%. The isolation ratios of Staphylococcus species were 7.8% (2,134/27,362) in female, 8.7% (3,118/35,807) in male and 8.3% (5,252/63,133) in both. The age-related frequencies of Staphylococcus species were 22.1% in the 60-69 year group, 19.3% in the 70-79 year group and 17.1% in the 50-59 year group. The isolation ratio of the 0-49 year group to the 50-over 80 year group were 1.74 times in female, 1.92 in male and 1.85 in both. The isolation frequency of Staphylococcus spp. was at its highest in April (9.9%) and at its lowest in February (6.8%) according to monthly analysis. According to seasonal variation, the isolation frequencies of Staphylococcus spp. were 27.0% in Summer, 25.9% in Spring, 23.9% in Fall and 23.2% in Winter. The clinical departments showing over 9% isolation rate against Staphylococcus spp. were critical care medicine (12.9%), department of pediatrics (11.6%), department of urology (9.8%) and department of neuro-surgery (9.1%). On the other hand, the lowest number was observed in the department of family medicine. The clinical material showing over 15% isolation rate against Staphylococcus spp. were 32.1% in urine (random urine and catheterized urine), 20.6% in blood and 16.0% in sputum.

• 한국동물위생학회지
• /
• 제31권3호
• /
• pp.339-345
• /
• 2008

This survey was carried out to investigate the infection rate of Riemerella anatipestifer from domestic ducks by isolation. A total of 145 samples (nasal swabs and carcasses) were collected from farms to examine the biochemical properties and antimicrobial susceptibility test from November 2006 to February 2008. Riemerella anatipestifer was isolated from 13 of 145 sample and isolation rate was higher in the ducks below 25 days (76%, 10/13 isolates) than those over 26 days (23%, 3/13). However, there was no significant difference in isolation rate between region. The biochemical properties of isolate were Gram negative (-), non-fermentative rod that grows fastidiously on routine media. In the test of antimicrobial drug susceptibility the isolates were susceptible to tetracycline(100%), enrofloxacin (77%), ampicillin (70%).

• Journal of Preventive Medicine and Public Health
• /
• 제42권6호
• /
• pp.408-415
• /
• 2009

Objectives : This study was performed to investigate the mumps transmission control status and inapparent infection rate among middle and high school students in Daegu City during a mumps outbreak. Methods : Nine schools (two middle schools and seven high schools), which reported a number of mumps cases between 2007 and 2008 were selected for investigation. During March-May 2008, a standard questionnaire was distributed to gather information about case identification, instructed isolation measure, isolation status of mumps cases and related factors, and outdoor activities of nonisolated mumps case. Inapparent infection rate was estimated by serum mumps IgM and IgG antibodies status and self-reported mumps symptoms in three of the nine schools. Results : Among 2,560 respondents, more than half of students answered that they did not receive instructions in mumps transmission control measures during the outbreak. Among the 327 mumps cases identified by the questionnaire, 131 cases (40.1%) were considered as isolated and the isolation rates were significantly different among schools, grades, and gender. Of the non-isolated cases, 88.3% continued attending school. Inapparent mumps infection rates were between 56.3% and 70.2%. Conclusions : Mumps transmission control was inadequate to control the mumps outbreak. Although high inapparent infection rate would mitigate the transmission control effect of case isolation, this measure is fundamental for infection control. The reasons of this inadequate status need to be explored to develop an effective intervention strategy.