ABSTRACT
Objective To study the detection rate of pathogens from sputum , blood, and bronchoalveolar lavage fluid ( BALF ) samples in acquired immunodeficiency syndrome ( AIDS ) patients complicated with pulmonary infection.Methods Seventy-three hospitalized AIDS patients complicated with pulmonary infection in Beijing Ditan Hospital , Capital Medical University were enrolled from February 2018 to September 2018.Blood, sputum and BALF samples were collected.Blood samples were cultured to detect anaerobic bacteria, aerobic bacteria, fungi and mycobacteria.Antigen agglutination method was applied in blood samples to detect cryptococcus neoformans.The sputum samples were tested for Mycobacterium tuberculosis by acid-fast staining and were cultured to detect bacteria and fungi.The sputum samples were observed under microscope for sporotrichosis and fungal spores.The BALF samples were cultured to detect bacteria and fungi. The BALF samples were tested for Mycobacterium tuberculosis by polymerase chain reaction amplification and acid-fast staining.Pneumocystis were detected in BALF samples by methenamine silver staining method .The BALF samples were observed under a microscope for sporotrichosis and fungal spores .The detection rate of pathogens from blood, sputum and BALF samples were compared.Chi-square test was conducted for statistical analysis.Results In 73 AIDS patients complicated with pulmonary infection , the pathogen detection rates in blood, sputum and BALF samples were 8 (11.0%), 23 ( 31.5%) and 48 (65.8%), respectively.The difference was statistically significant ( F ＝48.513, P ＜0.01 ).The detection rate in BALF samples was significantly higher than that in blood or sputum samples ( χ2 ＝43.349 and 17.136, respectively, both P＜0.01).The detection rate in sputum samples was significantly higher than that in blood (χ2 ＝9.215, P＜0.05). The highest detection rates of pathogens in blood , sputum and BALF samples were Talaromyces marneffei 4.1%(3), viridans group streptococci 16.4%(12) and 35.6%(26), respectively.Conclusions The detection rate of pathogens in BALF samples from AIDS patients complicated with pulmonary infection is the highest , followed by sputum and blood samples.
ABSTRACT
Objective To compare the clinical feasibility of different methods for detecting Clostridium difficile (CD) .Methods The stool samples were collected from the patients with suspected antibiotic-related diarrhea during 2016 ,and the enzyme linked immunosorbent assay (ELISA) and identification medium culture method were used for detection .Then the sensitivity ,specificity and consistency were compared between the two methods .Results 29 cases of antigen-positive specimens were measured by ELISA ,including 25 cases of toxin-positive and 4 cases of toxin negative ;29 suspected strains were cultured by the selective identification medium ,which were identified by the mass spectrometry as 28 strains of Clostridium difficile and 1 strain of undetected species ;the sensitivity and specificity of ELISA method and identification culture medium method were 97% ,100% and 93% ,95% respectively ,both methods showed extremely good consistency (Kappa=0 .92) .Conclusion The ELISA method has the characteristics of fastness ,high efficiency ,time saving ,simple operation ,easy interpretation and so on ,and can rapidly and accurately screen CD related diarrhea diseases ;the medium culture method has a good specificity and can rapidly obtain the infectious strain ;their combined use can greatly increase the CD detection rate and has great help for late treatment .
ABSTRACT
OBJECTIVE:To establish fingerprint of Zhizi jinhua pills(ZZJHW)and analyze the relationship of it with in vitro antioxidant activity,in order to provide the basis for the quality control of them. METHODS:HPLC method was adopted. The sep-aration was performed on a Sinochrom ODS-BP C18(200 mm×4.6 mm,5 μm)column with mobile phase consisted of 0.2% acetic acid(containing 3 mmol/L sodium heptanesulfonate solution)-acetonitrile(gradient elution)at the detection wavelength of 254 nm and flow rate of 0.8 ml/min. The column temperature was controlled at 38 ℃,and injection volume was 10 μl. The“Chromato-graphic Fingerprint Similarity Evaluation System for TCM”(2012.130723 edition) issued by Chinese Pharmacopoeia Commission was used to evaluate the similarity of the 12 batches of ZZJHW using baicalin as reference peak so as to attribute the common peak of fingerprint. DPPH free radical scavenging assay was used to investigate the in vitro antioxidant activity of 12 batches of ZZJHW,and the relationship between its fingerprint and antioxidant activity was studied. RESULTS:The fingerprint of 12 batches of ZZJHW was established and the similarity between the fingerprint of ZZJHW with their reference fingerprint were all above 0.9 (except S1,S2,S3,S12). 30 common peaks were marked,all of which were assigned to the herbs. Antioxidant experiment result showed the differences in the antioxidant capacity among different batches of ZZJHW;spectrum effect relationship showed that 13 common peaks were positively related with oxidation activity and 17 common peaks negatively related with it;among known com-ponents,oxidation activity components were mainly from Lonicera japonica,Scutellaria baicalensis and Rheum palmatum. CON-CLUSIONS:The spectrum effect relationship of established fingerprint with its antioxidant activity can provide reference for the quality control of ZZJHW.
ABSTRACT
Objective To investigate the pathogenic features and antibiotic resistance profile of nosocomial and community-acquired spontaneous bacterial peritonitis (SBP) in liver cirrhosis patients.Methods Two hundred and twenty-six cirrhotic patients with SBP who were admitted to Beijin Ditan Hospital from January 2001 to December 2008 were recruited into this study. The bacterial identification and drug susceptibility were performed. The data were analyzed by Chi square test and t test. Results Eighty-six(38.0% ) patients were diagnosed with nosocomial SBP and 140 (62.0%)were diagnosed with community-acquired SBP. The proportion of Child-Pugh Class C cases in patients with nosocomial SBP was higher than patients with community acquired SBP (97.7% vs. 82.8%; x2= 11. 489, P=0.001). Mortality rate in patients with nosocomiat SBP was also higher than patients with community acquired SBP (50. 0% vs. 30. 0%; x2 =9. 081,P=0. 003). Total 28 species (232strains) of bacteria were isolated from these patients. 77.5 % (69/89) of the nosomial SBP cases and 76.9% (110/143) of community-acquired SBP cases were caused by Gram-negative bacteria (mainly were Escherichia coli and Klebsiella pneumoniae). 19.1% nosocomial SBP cases and 21. 8%community-acquired SBP cases were caused by Gram-positive bacteria. Fungus infections accounted for 3.4% and 1.4% of these two population, respectively(P＞0.05). In patients with nosocomial SBP,19 out of 32 Escherichia coli stains and 5 out of 14 Klebsiella pneunmoniae strains were extended spectrum β-lactamase (ESBL) positive, while among 60 Escherichia coli stains and 32 Klebsiella pneunmoniae strains, only 11 Escherichia coli stains were ESBL positive (P＜0.05). The resistance rates of Gram-negative strains to cephalosporin and quinolone in nosocomial SBP patients were both higher than those in community-acquired SBP patients(P＜0. 05), but all Gram-negative isolates were sensitive to imipenem (P＞ 0. 05). No Gram-positive isolates resistant to vancomycin were found.Conclusions The liver cirrhosis patients with Child-Pugh Class C are vulnerable to nosocomial SBP and the prognosis is poor. Although the pathogenic spectrum are similar in cirrhotic patients with nosocomial and community-acquired SBP, which mainly are Escherichia coli and Klebsiella pneumoniae, the percentage of ESBL producing strains is higher in nosocomial SBP patients compared to that in community-acquired SBP patients.
ABSTRACT
Objective To study the location and significance of leptin and leptin receptor in rat submanibular gland. Methods Submandibular gland from SD rats were observed by hematoxylin-eosin, leptin and leptin receptor immunohistochemical staining. Result The granular convoluted tube and striated duct were leptin and leptin receptor positive. The density of positive cells in granular convoluted tube were much high than those of in striated duct. The acini were negative.Conclusion leptin and leptin receptor were widly expressed in granular convoluted tube and striated duct. These results might indicate that submandibular gland participated in adjusting the balance of energy.;
ABSTRACT
AIM: To study the possibility and conditions of transplacental infection of coxsackievirus B3(CVB 3) from pregnant mice to their fetuses and newborns. METHODS: Coxsackievirus B 3 strain causing balb/c mice myocardial injury(CVB 3m )was inoculated with 10 5 TCID 50 in dose into the mother mice at 6-7 days (early gestation),9-10 days (middle gestation) and 17-18 days (late gestation) of gestation, in contrast with non pregnant mice. Some placentas and fetuses were removed by caesarean section before mothers partusing; some mothers and their babies were sacrificed after parturition, and virus isolation, serological and pathological tests were performed. RESULTS: Viramiae was observed in mother mice of late gestation inoculated with CVB 3m at a fit amount on the second day after inoculation, while no newtralizing antibody to CVB 3m was detected in blood. The virus was isolated from cardiac muscles of inoculated mother mice in different gestation and the controls. The virus was also isolated from some placentas and fetuses, and both sera and cardiac muscles of infants in the late gestation (virus titer were all 10 -2 -10 -3 ). On d 7 of inoculating virus, pregnant and non pregnant mice titers of neutralizing antibody to CVB 3m in sera were all between 1160 and 1320. Under the electromicroscopy, some cardiac muscle cells of mother or infant mice appeared with morphological changes and little hollow bubbles occured in cytoplasm. The fibers broke off, and the bright and dark belts became indistinct. CONCLUSION: The amimal model, intraplacental passage of CVB 3 from pregnant mother in late gestation to fetus in mice, is a benefitial tool to study enterovirus diseases in human perinatal period.
ABSTRACT
Objective To observe the distribution of the neuropeptides in mouse sublingual gland. Method Using immunohistochemical ABC method. Results The striated duct cells in the sublingual gland showed somatostatin and calcitonin gene related peptide immunoreactivity positive which were in the cytoplasma, but the nucleus negative.Conclusion The striated duct cells in mouse sublingual gland also contained neuropetides; which may play an important role in regulating acinar secretion and blood supply.