ABSTRACT
A 66-year-old man was admitted for a 7-day history of painful blisters and erosions in the upper lip.Real-time PCR with herpes simplex virus (HSV) type-specific primers showed that the blister fluid and crusts were positive for HSV-1,but negative for HSV-2.Observation of the blister wall with transmission electron microscopy (TEM) revealed 3 types of nucleocapsid in the karyoplast of epithelia cells,including the electron-translucent core,granular core and electron-dense core.Numerous matured viral particles with envelope were found in the cytoplasm,which were identified as HSV.The diagnosis was made as herpes simplex in the upper lip based on the above findings.PCR based molecular typing combined with observation of HSV particles via TEM may be an effective approach to the definite diagnosis of primary herpes simplex.
ABSTRACT
OBJECTIVE:To establish a HPLC method for simultaneous determination of paracetamol and dioxopromethazine hydrochloride in compound paracetamol and zinc gluconat tablets. METHODS: The determination was performed on Sinochrom ODS-BP column with the mobile phase consisting of 0.04 mol?L-1 KH2PO4 (pH=2.60,0.40% triethylamine)-acetonitril (75∶25) at a flow rate of 1.0 mL?min-1;the detection wavelength was set at 264 nm;the column was maintained at room temperature and the sample size was 20 ?L. RESULTS: The calibration curve was linear over the range of 2.818? 10-3～3.605?10-1 mmol?L-1 for paracetamol and 1.118?10-4～1.431?10-2 mmol?L-1 for dioxopromethazine hydrochloride. The recovery rates of both were greater than 99.2%. The intra-day RSDs of both were less than 1.82% and the between-day RSDs of both were less than 1.90%. CONCLUSION: The method is rapid,simple and accurate,and it is applicable for the quality control of the tablets.