• Korean Journal of Veterinary Research
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• v.58 no.3
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• pp.137-141
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• 2018

The efficacy of the CA-2-MP120 vaccine, a cell culture-attenuated strain of virulent porcine reproductive and respiratory syndrome virus (PRRSV), was assessed in pigs. Despite the persistence of viremia in all vaccinated animals during the immunization period, the virus was not detected in vaccinated pigs following challenge. Furthermore, no pigs in the vaccinated group shed PRRSV nasally, orally or rectally throughout the experiment. Moreover, histopathological lung and lymph node lesions in the immunized group were much milder than those in the unimmunized and challenged group. These results indicated that CA-2-MP120 can provide effective protection against virulent wild-type PRRSV-2.

• Toxicological Research
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• v.27 no.2
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• pp.111-118
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• 2011

This study was performed to evaluate the toxicity of polysaccharide-based Streptococcus pneumoniae vaccine in Specific Pathogen Free (SPF), Sprague-Dawley (SD) rats. S. pneumoniae vaccine was administrated subcutaneously each dose level of high (560 ${\mu}g$/rat), medium (280 ${\mu}g$/rat) and low (140 ${\mu}g$/rat) on days 0, 14, 28. The rats were observed for 2 weeks or 4 weeks after the final injection. During this test, there were no significant dose-dependent changes in body weight, water and food consumption. In urinalysis and serum chemistry, dose-related changes were not detected. In hematology, the percent of neutrophils and lymphocytes in white blood cells were changed significantly. According to the measurement of organ weight, only spleen weight was significantly increased in all groups of administration compared to the control group. In the histopathological examination, an antigen-deposit, vacuolated macrophages, infiltrated inflammatory cells and a formation of granulation tissue were observed at the site of an administration. These results are considered as an outcome by immune responses through a vaccination. Consequently, the results of this study demonstrated that S. pneumoniae vaccine has no toxicity when it was administrated subcutaneously three times in 2-week interval at a high dose of 560 ${\mu}g$/rat.

• Journal of Preventive Medicine and Public Health
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• v.35 no.1
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• pp.33-40
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• 2002

Objective : From an analysis of a community outbreak of measles in Youngju, Gyeongbuk, in March 2000, the authors evaluated the effectiveness of the measles vaccination and its determinants to Provide an epidemiologic basis for the establishment of a vaccination policy. Methods : Information was collected regarding the vaccinations from the health records of four primary schools and through a questionnaire surrey of the parents of students in two middle and two high schools (N=4638). Measles cases were surveyed from the patient list of each school and from case reports in the public health center. The attack rate and vaccine effectiveness of measles was evaluated by school; grade; frequency, region, and institution of vaccination. Results : The attack rate cf measles, 6.3% among the total subjects, was higher in middle school students (15.8%) than in primary (2.0%, p<0.05) and high school students (8.9%, p<0.05). The attack rate of the unvaccinated group was 4.6-fold higher than the vaccinated group in primary schools (p<0.05). Vaccine effectiveness was 83.2% among lower graders of primary schools, 34.0% among higher graders of primary schools,26.1% in middle schools, and -7.0% in high schools. In multiple logistic regression analysis, grade in school (odds ratio, 0.77; 95% CI=0.67-0.87) and frequency of vaccination (odds ratio, 0.57: 95% CI=0.37-0.58) were significant predictors of the outcome. Conclusions : We concluded that the explosive outbreak of measles in this area resulted from both inadequate vaccination coverage and secondary failure of vaccination. There was no evidence of any effect of the cold chain system on the vaccine failure.

• Journal of Korean Foot and Ankle Society
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• v.26 no.1
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• pp.48-53
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• 2022

The current SARS-CoV-2 coronavirus disease 2019 (COVID-19) pandemic has been a particular challenge for diabetes patients. Since these patients are at a higher risk of COVID-19, they have been prioritized for vaccination. In this report, we describe the case of a patient scheduled for diabetic foot amputation who received the first dose of ChAdOx1 nCov-19 vaccine and subsequently developed severe purpura in his genitalia and both of his hands and feet, accompanied by acute renal failure. The operation had to be postponed as severe limb purpura appeared just before the operation. With adequate management for acute renal failure and topical steroid application for the severe purpura lesions, a successful outcome could be obtained after the delayed first ray amputation. We recommend that COVID-19 vaccination should be carefully administered in patients with a diabetic foot requiring amputation.

• Journal of Preventive Medicine and Public Health
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• v.56 no.3
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• pp.221-230
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• 2023

Objectives: The second wave of coronavirus disease 2019 (COVID-19) cases in Indonesia, during which the Delta variant predominated, took place after a vaccination program had been initiated in the country. This study was conducted to assess the impact of COVID-19 vaccination on unfavorable clinical outcomes including hospitalization, severe COVID-19, intensive care unit (ICU) admission, and death using a real-world model. Methods: This single-center retrospective cohort study involved patients with COVID-19 aged ≥18 years who presented to the COVID-19 emergency room at a secondary referral teaching hospital between June 1, 2021 and August 31, 2021. We used a binary logistic regression model to assess the effect of COVID-19 vaccination on unfavorable clinical outcomes, with age, sex, and comorbidities as confounding variables. Results: A total of 716 patients were included, 32.1% of whom were vaccinated. The elderly participants (≥65 years) had the lowest vaccine coverage among age groups. Vaccination had an effectiveness of 50% (95% confidence interval [CI], 25 to 66) for preventing hospitalization, 97% (95% CI, 77 to 99) for preventing severe COVID-19, 95% (95% CI, 56 to 99) for preventing ICU admission, and 90% (95% CI, 22 to 99) for preventing death. Interestingly, patients with type 2 diabetes had a 2-fold to 4-fold elevated risk of unfavorable outcomes. Conclusions: Among adults, COVID-19 vaccination has a moderate preventive impact on hospitalization but a high preventive impact on severe COVID-19, ICU admission, and death. The authors suggest that relevant parties increase COVID-19 vaccination coverage, especially in the elderly population.

• Pediatric Infection and Vaccine
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• v.6 no.1
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• pp.131-135
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• 1999

Respiratory Syncytial Virus(RSV) causes acute respiratory tract infections in young infancy such as bronchiolitis, pneumonia. RSV infections are uncommon in the first month of life. Clinical manifestations of neonatal RSV infection are respiratory symptoms, apnea and bacterial sepsis like illness such as lethargy, poor feeding, fever, rash. We report a case of neonatal pneumonia caused by RSV and accompanied by transient apnea and favorable clinical outcome.

• Korean Journal of Poultry Science
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• v.35 no.3
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• pp.225-240
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• 2008

Marek's disease virus(MDV) is a highly cell-associated, lymphotropic $\alpha$-herpesvirus that causes paralysis and neoplastic disease in chickens. The disease has been controlled by vaccination which was provided the first evidence for a malignant cancer being controlled by an antiviral vaccine. Marek's disease pathogenesis is complex, involving cytolytic and latent infection of lymphoid cells and oncogenic transformation of $CD4^+$ T cells in susceptible chickens. MDV targets a number of different cell types during its life cycle. Lymphocytes play an essential role, although within them virus production is restricted and only virion are produced. Innate and adaptive immune responses develop in response to infection, but infection of lymphocytes results in immunosuppressive effects. Hence in MDV-infected birds, MDV makes its host more vulnerable to tumour development as well as to other pathogens. All chickens are susceptible to MDV infection, and vaccination is essential to protect the susceptible host from developing clinical disease. Nevertheless, MDV infects and replicates in vaccinated chickens, with the challenge virus being shed from the feather-follicle epithelium. The outcome of infection with MDV depends on a complex interplay of factors involving the MDV pathotype and the host genotype. Host factors that influence the course of MD are predominantly the responses of the innate and adaptive immune systems, and these are modulated by: age at infection and maturity of the immune system; vaccination status; the sex of the host; and various physiological factors.

• Clinical and Experimental Pediatrics
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• v.57 no.12
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• pp.538-541
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• 2014

Varicella is usually considered to be a benign disease in healthy children; however, serious complications can occur such as necrotizing fasciitis and toxic shock syndrome. We describe a 38-month-old girl with necrotizing fasciitis and streptococcal toxic shock syndrome following varicella. She was previously healthy and vaccinated against varicella at 12 months of age. She had been diagnosed with varicella three days prior to presenting at our facility; she developed fever, vomiting, and painful swelling on her left flank. Her skin lesions worsened, she became lethargic, and had episodes of hypotension and coagulopathy. Necrotizing fasciitis on the left abdominal wall, buttocks, and left thigh was diagnosed by magnetic resonance imaging, and group A Streptococcus was isolated from a tissue culture. She was diagnosed as necrotizing fasciitis and streptococcal toxic shock syndrome, and successfully treated with repeated surgical debridement and fasciotomy, in addition to intensive antibiotics. Our experience suggests that necrotizing fasciitis in patients with varicella should be considered to be a rare complication even with widespread vaccine use. Early diagnosis and intensive treatment are required to prevent a fatal outcome.

• Pediatric Infection and Vaccine
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• v.2 no.2
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• pp.200-206
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• 1995

Myocarditis refers to inflammation, necrosis, or myocytolysis that may be due to many infectious, connective tissue and many other causes affecting the myocardium or involvement of the endocardium or pericardium. The most common manifestation is congestive heart failure, although arrhythmias and sudden death may be the first sign of myocarditis. Viral myocarditis is typically a sporadic but occasionally epidemic illness, noted as an acute potentially fulminant disease of 1-to 4-wk-old infants, as an acute but more benign myopericarditis of toddlers and young children. The most common casuative agent in viral myocarditis is Coxsackievirus and the outcome of the biopsy-proven chronic dilated cardiomyopathy associated with Coxsackievirus is poor without therapy. Myocarditis may be confirmed by percutaneous endomyocardial biopsy and the viral myocarditis may be diagnosed by the serological viral study with the clinical manifestations. He was admitted for the management of tachyarrhythmias occurred suddenly without prodromal symptoms and signs and diagnosed as viral pancarditis by serological Coxsackievirus study, echocardiogram, chest x-ray, EKG and other clinical manifestations.

• Pediatric Infection and Vaccine
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• v.22 no.1
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• pp.29-35
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• 2015

Purpose: The purpose of this study was to investigate the clinical characteristics and outcome of febrile urinary tract infections (UTIs) caused by community-acquired extended-spectrum ${\beta}$-lactamase (CA-ESBL)-producing and -nonproducing bacteria. Methods: We analyzed febrile UTIs in children hospitalized at Gachon University Gil Medical Center from January 2011 to December 2013 through retrospective data collection from their medical records. Results: Among pathogens causing 374 episodes of UTIs, the proportion of ESBL-producing bacteria was 13.1% (49/374). The proportion of ESBL-producing Escherichia coli and Klebsiella spp. was 13.6% (48/354) and 5.0% (1/20), respectively. There was no significant difference between the CA-ESBL and CA non-ESBL groups in duration of fever ($4.2{\pm}2.7$ vs. $3.7{\pm}2.1$ days, P=0.10) and bacterial eradication rate with empirical antibiotics (100% vs. 100%). The risk of cortical defects on renal scan significantly depended on existence of vesicoureteral reflux rather than ESBL production of pathogen. Conclusions: There was no significant difference between the CA-ESBL and CA non-ESBL groups in renal cortical defects and clinical outcome. Careful choice of antibiotics is important for treatment of community-acquired UTI in children.