The advent of the global pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) necessitates a thorough study of the stability and transmissibility in the environment. We characterized the stability of SARS-CoV-2 in three water matrices: fresh, tap, and seawater. The minimum infective dose of SARS-CoV-2 in Vero cells was confirmed to be 10 3 PFU/mL. The stability of SARS-CoV-2 varied according to the water matrix: infective SARSCoV-2 was undetectable after treatment with fresh water and seawater, but remained detectable for 2 days in tap water, when starting with an initial concentration of 10 4 PFU/mL. When the starting concentration was increased to 10 5 PFU/mL, a similar trend was observed. In addition, viral RNA persisted longer than infectious virus in all water matrices. This study was conducted in stagnant water containing a significantly high titer of virus, thus, human-to-human transmission of SARS-CoV-2 through the actual aquatic environment is expected to be rare.

Early gastric cancer is defined carcinoma that is limited to the gastric mucosa and submucosa and that does not extend into the muscularis propria. The development and widespread use of upper gnstrointestinal endoscopy with biopsy and cytology have enhanced our ability to make early diagnosis of gastrie carcinoma. Gastric cancinoma is being diagnosed at an ealry stage aad the survival rates for these patients are significantly greater than those with advanced gastric carcinoma. These ealry lesion can be cured in over 90% of the cases. In fact, it is almost impossible to follow up cases of early gastric cancer without surgical treatment. We report a case developed advanced gastric carcinoma 34 months after initial endoseopic diagnosis of early gastric cancer. A, 48-year-old woman was diagnosed early gaatrie cancer on June 21, 1985 by endoscopy. Proper surgical intetvention was not carried out due to her liver cirrhosis. The follow-up endoscopic examination was done on March 16, 1988. The gastric cancer looked like an advanced stomach and extended to other site.
Biopsy ; Diagnosis* ; Early Diagnosis ; Endoscopy ; Female ; Follow-Up Studies ; Gastric Mucosa ; Humans ; Liver Cirrhosis ; Middle Aged ; Stomach ; Stomach Neoplasms* ; Survival Rate

No abstract available.
PUVA Therapy* ; Telangiectasis*

No abstract available.
Spinal Muscular Atrophies of Childhood*

OBJECTIVE: Flow cytometric deoxyribonucleic acid (DNA) content analysis has been shown to be of prognostic importance in some cancers. In this study, DNA patterns obtained by flow cytometry in patients with cervical cancer have been shown to be related to a prognostic importance in cervical carcinoma. METHODS AND MATERIALS: We retrospectively reviewed 59 cervical cancer patients who admitted to the department of obstetrics and gynecology, Samsung Medical Center firom January 1995 to May 1997. RESULTS: A total of 59 archival paraffin-embedded blocks were proc 42.4 percent were found to be DNA content aneuploid (DNA-A) and 57.6 percent DNA content diploid (DNA-D). The S-phase fraction was significantly increased with stage. The incidences of aneuploid and relative DNA index were not significantly increased with the stage(P=0.280) and age of patients(P=0.088). The results had no significant differences between the squamous cell carcinoma and adenocarcinoma, and no relationship between the groups with keratinizing cell type and nonkeratinizing type(P=0.409). The DNA ploidy patterns were not significantly correlated with metastasis to lymph node(P=0.179), tumor size(P=0.109), invasion depth(P=0.361) and recurrent group(P=0.285). High S-phase fraction had a tendency to correlate with the invasion depth(P=0,011), size(P=0.027), lymph node metastasis(P=0.039) and recurence(P=0.099) of cervical cancer. CONCLUSION: Flow cytometric DNA content analysis is being used more frequently in the management of different malignant tumors. Our study shows that DNA content analysis may not serve as an important biological indicator in determining the prognosis in cervical carcinoma, but High S-phase fraction has been connected with more aggressive tumors.
Adenocarcinoma ; Aneuploidy ; Carcinoma, Squamous Cell ; Cervix Uteri* ; Diploidy ; DNA* ; Female ; Flow Cytometry ; Gynecology ; Humans ; Incidence ; Lymph Nodes ; Neoplasm Metastasis ; Obstetrics ; Ploidies ; Prognosis ; Retrospective Studies ; Uterine Cervical Neoplasms

No abstract available.
Autopsy* ; Cardiomyopathies* ; Humans ; Infant, Newborn*

No abstract available.
Ciliary Motility Disorders*

In air leak syndrome, a significant portion of the volume delivered during a positive pressure breath can be lost through the leak. HFOV can achieve adequate ventilation at lower peak and/or mean intrapulmonary pressure than conventional mechanical ventilation (CMV) and has been an effective treatment of already established air leak syndrome. We report a 1-day-old male infant with severe respiratory failure from pneumothorax and pneumomediastinum, who was refractory to CMV with chest tube drainage. HFOV was applied to this patient for 114 hours, and improvement of oxygenation and ventilation as well as significant reduction of pneumothorax followed.
Chest Tubes ; Drainage ; Humans ; Infant ; Male ; Mediastinal Emphysema ; Oxygen ; Pneumothorax ; Respiration, Artificial ; Respiratory Insufficiency ; Ventilation*

Aortic transection or interruption is a rare condition which developed after an acute deceleration injury. Its occurrence depends on the location and direction of the force applied and is usually from motor vehicle accident or falling down. The exact incidence of aortic transection in trauma is not known but, when develops, only about 10-15% of the victims can furtive and be transported to the hospital. Even in the survivors, majority of them will be fatal within a few days if a prompt diagnosis and surgical treatments are not made. Aggressive diagnostic work-up is recommended for the patients with high suspicious index, which would salvage the victims with this fatal condition. We report the experience of two cases of aortic transection or interruption following motor vehicle accidents.
Deceleration ; Diagnosis ; Early Diagnosis* ; Humans ; Incidence ; Motor Vehicles ; Survivors ; Thorax* ; Wounds and Injuries*

No abstract available.
Breech Presentation* ; Female ; Fetus* ; Pregnancy