AIM:To evaluate the association between Chlamydia pneumoniae (Cpn) infection and primary biliary cirrhosis (PBC). METHODS: CpnIq/G and IgM were determined by enzyme-linked immunosorbent assay (ELBA) in 41 well-establi...AIM:To evaluate the association between Chlamydia pneumoniae (Cpn) infection and primary biliary cirrhosis (PBC). METHODS: CpnIq/G and IgM were determined by enzyme-linked immunosorbent assay (ELBA) in 41 well-established PBC patients and two race-matched control groups (post-hepatitis cirrhosis, n = 70; healthy controls, n = 57). RESULTS: The mean level and seroprevalence of Cpn IgG in PBC group and post-hepatitis cirrhosis (PHC) group were significantly higher than those in healthy controls (46.8±43.4 RU/mL, 49.5±45.2 RU/mL vs28.3±32.7 RU/mL; 68.3%, 71.4%, 42.1%, respectively; P<0.05). There was a remarkably elevated seroprevalence of Cpn IgM in patients with PBC (22.0%) compared to the PHC and healthy control (HC) groups. For the PBC patients versus the HCs, the odds ratios (ORs) of the presence of Cpn IgG and IgM were 2.7 (95% CI 0.9-6.1) and 5.1 (95% CI 1.4-18.5), respectively. Though there was no correlation in the level of Cpn IgG with total IgG in sera of patients with PBC (r = -0.857, P = 0.344>0.05), Cpn IgM was related with the abnormally high concentrations of total IgM in PBC group. CONCLUSION: The results of this study do not support the hypothesis that infection with Chlamydia pneumoniae may be a triggering agent or even a causative agent in PBC, but suggest that Chlamydia pneumoniae infection probably contributes to the high level of IgM present in most patients with PBC.展开更多
Objective: To detect the inhibition of urogenitalchlamydia trachomatis (CT) by 12 traditional Chinesemedicines in vitro.Methods: The inhibition of CT isolates by these medicineswas detected by micro-culture technique ...Objective: To detect the inhibition of urogenitalchlamydia trachomatis (CT) by 12 traditional Chinesemedicines in vitro.Methods: The inhibition of CT isolates by these medicineswas detected by micro-culture technique with McCoy cellsin vitro. Results: All the diuretic traditional Chinese medicinesinhibited urogenital CT The minimum inhibitoryconcentrations (MICs) ranged from 0.122 mg ml^(-1) to 62.5mg ml^(-1). Diathus superbus L., Poria cocos (Shew.) Woft,Polyporus umbellatus (Pers.) Fries, and Artemisia capillariesThunb showed stronger inhibition than the other eighttraditional Chinese medicines. The numbers and sizes ofinclusions bodies reduced gradually and disappeared finallywith the increase of the concentrations. Conclusion: All the 12 diuretic traditional Chinesemedicines inhibited urogenital CT.展开更多
Chlamydia, a human pathogen that mediates chronic, persistent and repeated infection progress, is capable of inflicting permanent scar formation. A typical reticular body is found in persistent infections. Chlamydial ...Chlamydia, a human pathogen that mediates chronic, persistent and repeated infection progress, is capable of inflicting permanent scar formation. A typical reticular body is found in persistent infections. Chlamydial Hsp 60, interferon(IFN) -gamma and other cytokines function in the course of repeated infection. Immunopathological factors mediate chronic infection.展开更多
Research data showed that syndromic approach could successfully manage gonococcal and chlamydial infections in males and syphilis and chancroid in males and females. However, low sensitivity, specificity and positive ...Research data showed that syndromic approach could successfully manage gonococcal and chlamydial infections in males and syphilis and chancroid in males and females. However, low sensitivity, specificity and positive predictive value were found in the syndromic management of vaginal discharge. It is recommended that the syndromic algorithm for management of vaginal discharge used when serving high-risk and symptomatic women.展开更多
Hydrazones of poorly studied fluorine-containing oxamic acid thiohydrazides were synthesized by the reaction with salicylaldehydes. Tests showed that the newly synthesized compounds were effective low-toxic inhibitors...Hydrazones of poorly studied fluorine-containing oxamic acid thiohydrazides were synthesized by the reaction with salicylaldehydes. Tests showed that the newly synthesized compounds were effective low-toxic inhibitors of type III secretion system in Chlamydia trachomatis.展开更多
Objective: To compare the sensitivity and specificity of thecervical/urethral swabs with voided urine specimens for thedetection of genitourinary tract infection with Chlamydia tra-chomatis and determine whether urine...Objective: To compare the sensitivity and specificity of thecervical/urethral swabs with voided urine specimens for thedetection of genitourinary tract infection with Chlamydia tra-chomatis and determine whether urine specimens can replacethe cervical/urethral swabs in detection of C. thachomatis. Methods: The matched cervical/urethral swabs and voidedurine specimens were collected from 569 patients of STD clinics.Polymerase chain reaction (PCR) assay specific for C. tra-chomatis plasmid DNA and rapid antigen testing (Clear viewassay) was used to detect C trachomatis. Standard criteria thatdefined 'true' positive included: 1) positive PCR results both incervical/urethral swab and voided urine specimen or 2) positivevoided urine results both by PCR assay and clear view test or 3)positive results in both PCR assay of cervical/urethral swab andclear view test of voided urine. For statistical analysis, thechi-square test was used. Results: The prevalence of C trachomatis in patients withsymptoms was 12.1% (28/231) in women and 10.4%(10/96) inmen, with no significant difference between them (x^2=0.21,P>0.05). The prevalence of C trachomatis in patients with nosymptoms was 11.0% (11/100) in women and 15.5% (22/142) inmen, with a significant difference existing between them. (x^2=4.0, P<0.05). No significant difference (P>0.05) existed betweenPCR testing of swabs (sensitivity 87.3%; specificity 99.2%) andPCR testing of urine (sensitivity 88.7%: specificity 98.8%). Asfor clear view assay, sensitivity was 60.6% and specificity was100%. Conclusions: PCR assay is superior to clear view in detectingC trachomatis. Although both PCR testing of swabs and PCRtesting of urine specimens both have high sensitivity and speci-ficity, urine specimen testing is more cost-effective, practical andnoninvasive. Thus urine specimens can take the place of theswabs in PCR testing for chlamydia.展开更多
Objective: To analyze the causes of persistent infection of Chlamydia trachomatis in the urogenital system. Method: We followed 223 patients with Chlamydia trachomatis infection who were treated regularly. Result: ...Objective: To analyze the causes of persistent infection of Chlamydia trachomatis in the urogenital system. Method: We followed 223 patients with Chlamydia trachomatis infection who were treated regularly. Result: After treatment, 22.87% of cases still tested positive. After one year and change of treatment regime,4.48% of cases remained positive, most of whom were female. Conclusion: The course of Chlamydia trachomatis infection in the urogenital system is varied. This diversity has many causes including immunocompetence the characteristics of chalmydia trchomatis infection and genetic resistance.展开更多
Objectives: To find out the level and functions of Chlamydia trachomatis heat shock protein (C-hsp60) antibody, anti-spermantibody(ASAb), interleukin 1(IL-1), interleukin 6 (IL-6),interleukin 8 (IL-8), Tumor necrosis ...Objectives: To find out the level and functions of Chlamydia trachomatis heat shock protein (C-hsp60) antibody, anti-spermantibody(ASAb), interleukin 1(IL-1), interleukin 6 (IL-6),interleukin 8 (IL-8), Tumor necrosis factor alpha (TNF-α)and γ-interferon (IFN-γ) in patients with CT-related infertility. Methods: CT-DNA of cervical secretions was detectedthrough polymerase chain reaction (PCR) and migrationinhibiting factor (MIF) was employed to measure IgG titre ofCT MOMP antibody. Western blot was used to determinepresence of C-hsp60 antibody and enzyme-linkedimmunoadsorbent assay (ELISA) measured ASAb of IgG typein blood serum and determine the content of IL-1, IL-6. IL-8.TNF-α. IFN-γ in uterine tube fluid. Results: 68 patients had positive CT-DNA, among which 57(83.8%) had C-hsp60 antibody. Among the 172 patients withnegative CT-DNA, 64 patients (37.2%) also had C-hsp60Antibody. There was a significant difference (P<0.01) betweeninfertile patients and control group patients in the presence ofAAb. Infertile patients with positive CT-DNA had higher levels of IL-1、IL-6. IL-8. TNF-α. IFN-γ in uterine tube fluidcompared to control group patients (P<0.01). Conclusion: Firstly, those patients with negative CT testingfrom cervical secretions cannot be ruled out for CT infectionin deep parts of the body (such as oviduct, pelvic kidney).Detection of C-hsp60 Antibody may help to diagnose suchcases of CT. Secondly, CT infection of the oviduct can raiselevels of IL-1、IL-6、 IL-8、 TNF-α. IFN-γ. The pathogenesis ofinfertility caused by CT infection in the reproductive tractmay be related to cytokine production and inflammatoryresponses mediated by C-hsp60 Antibody, IL-1, IL-6, IL-8,TNF-α, and IFN-γ.展开更多
Objective:To establish a rapid and simple assay for the diagnosis of Chlamydia trachomatis (CT) infection. Methods BALB/c mice were immunized with SDS-PAGE purified major outer membrane protein (MOMP) from CT and the ...Objective:To establish a rapid and simple assay for the diagnosis of Chlamydia trachomatis (CT) infection. Methods BALB/c mice were immunized with SDS-PAGE purified major outer membrane protein (MOMP) from CT and the monoclonal antibodies were obtained subsequently. Two-site ELISA was developed to detect CT infection. Results: The established assay was able to detect as low as 1.248ug/ml MOMP with interrun and inrun CV 6.9% and 3.1% respectively. 94% (34/36) of culture-positive samples were found to be positive in the current examination, indicating the high sensitivity of this assay. Conclusion: The assay is applicable for clinical diagnosis of CT infection.展开更多
Object: To investigate the relationship between chlamydiatrachomatis (CT) and urogenital infection. Method Positive rate of CT in patients with inflammationof urogenital tract was significantly higher than those witho...Object: To investigate the relationship between chlamydiatrachomatis (CT) and urogenital infection. Method Positive rate of CT in patients with inflammationof urogenital tract was significantly higher than those withoutinflammation(P<0.05). Result: There was statistical difference in the males nomatter they were patients with inflammation of urogenitaltract or not (P>H0.05), while there was no statistical differencein females (P>0.05). The incidence of the infection was highamong those aging from 21-50 years old. Conclusion: The clinical manifestations of CT infectionwere obscure, so we should examine CT in patients who haveno symptoms, especially in females and those of high-riskpopulation.展开更多
The nucleocapsid protein(N) is a major structural protein of coronaviruses. The N protein of bat SARS-like coronavirus(SL-CoV) has a high similarity with that of SARS-CoV. In this study,the SL-CoV N protein was expres...The nucleocapsid protein(N) is a major structural protein of coronaviruses. The N protein of bat SARS-like coronavirus(SL-CoV) has a high similarity with that of SARS-CoV. In this study,the SL-CoV N protein was expressed in Escherichia coli,purified and used as antigen. An Indirect Enzyme-Linked Immunosorbent Assay(indirect ELISA) was developed for detection of SARS-or SL-CoV infections in bat populations. The detection of 573 bat sera with this indirect ELISA demonstrated that SL-CoVs consistently circulate in Rhinilophus species,further supporting the proposal that bats are natural reservoirs of SL-CoVs. This method uses 1-2 μl of serum sample and can be used for preliminary screening of infections by SARS-or SL-CoV with a small amount of serum sample.展开更多
Objectives: To evaluate the Vidas Chlamydia (CHL) assayfor detecting C.Trachomatis with swabs and first catch urine(FCU) specimens from STD patients and high riskpopulations. Methods: A total of 383 pahents were teste...Objectives: To evaluate the Vidas Chlamydia (CHL) assayfor detecting C.Trachomatis with swabs and first catch urine(FCU) specimens from STD patients and high riskpopulations. Methods: A total of 383 pahents were tested with tissueculture (TC), Vidas CHL and polymerase chain reaction (PCR)for C.trachomatis on male and female swabs, with Vidas CHLtesting male FCU specimens. CHL positive and equivocalresults were confirmed with a blocking assay (CHB). Truepositive were defined as either TC positive, or TC negtive butCHL and PCR positive. The performance of TC, CHL andPCR were evaluated according to this expanded goldstandard. Results: Compared with the expanded gold standard, 54 ofthe 232 male specimens were true positive results. For maleswabs, TC, CHL and PCR had sensitivities of 90.7%, 96.3%and 94.4%, and specificities of 100%, 98.3% and 97.2%,respectively. Differences were not statistically significant. Formale FCU specimens, CHL sensitivity and specificity were83.3% and 98.3%; there was little difference between theseresults and that of matched swabs. Compared with theexpanded gold standard, 28 of the 151 female swabs were truepositive; TC, CHL and PCR had sensitivities of 82.1%, 100%and 96.4%, and specificities of 100%, 98.4% and 97.6%,respectively. The difference was also not significant. Conclusions: Vidas CHL assay is very scnsitive and specificfor C.trachomatis detection with swab specimens of male andfemale STD patients. For male FCU specimens, the assay alsohad high sensitivity and specificity. CHB may not be needed inthe routine detection or Chlamydia infections. Populationswith higher incidence of C.trachomatis infection.展开更多
基金Supported by the National Natural Science Foundation of China, No. 30300157
文摘AIM:To evaluate the association between Chlamydia pneumoniae (Cpn) infection and primary biliary cirrhosis (PBC). METHODS: CpnIq/G and IgM were determined by enzyme-linked immunosorbent assay (ELBA) in 41 well-established PBC patients and two race-matched control groups (post-hepatitis cirrhosis, n = 70; healthy controls, n = 57). RESULTS: The mean level and seroprevalence of Cpn IgG in PBC group and post-hepatitis cirrhosis (PHC) group were significantly higher than those in healthy controls (46.8±43.4 RU/mL, 49.5±45.2 RU/mL vs28.3±32.7 RU/mL; 68.3%, 71.4%, 42.1%, respectively; P<0.05). There was a remarkably elevated seroprevalence of Cpn IgM in patients with PBC (22.0%) compared to the PHC and healthy control (HC) groups. For the PBC patients versus the HCs, the odds ratios (ORs) of the presence of Cpn IgG and IgM were 2.7 (95% CI 0.9-6.1) and 5.1 (95% CI 1.4-18.5), respectively. Though there was no correlation in the level of Cpn IgG with total IgG in sera of patients with PBC (r = -0.857, P = 0.344>0.05), Cpn IgM was related with the abnormally high concentrations of total IgM in PBC group. CONCLUSION: The results of this study do not support the hypothesis that infection with Chlamydia pneumoniae may be a triggering agent or even a causative agent in PBC, but suggest that Chlamydia pneumoniae infection probably contributes to the high level of IgM present in most patients with PBC.
文摘Objective: To detect the inhibition of urogenitalchlamydia trachomatis (CT) by 12 traditional Chinesemedicines in vitro.Methods: The inhibition of CT isolates by these medicineswas detected by micro-culture technique with McCoy cellsin vitro. Results: All the diuretic traditional Chinese medicinesinhibited urogenital CT The minimum inhibitoryconcentrations (MICs) ranged from 0.122 mg ml^(-1) to 62.5mg ml^(-1). Diathus superbus L., Poria cocos (Shew.) Woft,Polyporus umbellatus (Pers.) Fries, and Artemisia capillariesThunb showed stronger inhibition than the other eighttraditional Chinese medicines. The numbers and sizes ofinclusions bodies reduced gradually and disappeared finallywith the increase of the concentrations. Conclusion: All the 12 diuretic traditional Chinesemedicines inhibited urogenital CT.
文摘Chlamydia, a human pathogen that mediates chronic, persistent and repeated infection progress, is capable of inflicting permanent scar formation. A typical reticular body is found in persistent infections. Chlamydial Hsp 60, interferon(IFN) -gamma and other cytokines function in the course of repeated infection. Immunopathological factors mediate chronic infection.
文摘Research data showed that syndromic approach could successfully manage gonococcal and chlamydial infections in males and syphilis and chancroid in males and females. However, low sensitivity, specificity and positive predictive value were found in the syndromic management of vaginal discharge. It is recommended that the syndromic algorithm for management of vaginal discharge used when serving high-risk and symptomatic women.
文摘Hydrazones of poorly studied fluorine-containing oxamic acid thiohydrazides were synthesized by the reaction with salicylaldehydes. Tests showed that the newly synthesized compounds were effective low-toxic inhibitors of type III secretion system in Chlamydia trachomatis.
文摘Objective: To compare the sensitivity and specificity of thecervical/urethral swabs with voided urine specimens for thedetection of genitourinary tract infection with Chlamydia tra-chomatis and determine whether urine specimens can replacethe cervical/urethral swabs in detection of C. thachomatis. Methods: The matched cervical/urethral swabs and voidedurine specimens were collected from 569 patients of STD clinics.Polymerase chain reaction (PCR) assay specific for C. tra-chomatis plasmid DNA and rapid antigen testing (Clear viewassay) was used to detect C trachomatis. Standard criteria thatdefined 'true' positive included: 1) positive PCR results both incervical/urethral swab and voided urine specimen or 2) positivevoided urine results both by PCR assay and clear view test or 3)positive results in both PCR assay of cervical/urethral swab andclear view test of voided urine. For statistical analysis, thechi-square test was used. Results: The prevalence of C trachomatis in patients withsymptoms was 12.1% (28/231) in women and 10.4%(10/96) inmen, with no significant difference between them (x^2=0.21,P>0.05). The prevalence of C trachomatis in patients with nosymptoms was 11.0% (11/100) in women and 15.5% (22/142) inmen, with a significant difference existing between them. (x^2=4.0, P<0.05). No significant difference (P>0.05) existed betweenPCR testing of swabs (sensitivity 87.3%; specificity 99.2%) andPCR testing of urine (sensitivity 88.7%: specificity 98.8%). Asfor clear view assay, sensitivity was 60.6% and specificity was100%. Conclusions: PCR assay is superior to clear view in detectingC trachomatis. Although both PCR testing of swabs and PCRtesting of urine specimens both have high sensitivity and speci-ficity, urine specimen testing is more cost-effective, practical andnoninvasive. Thus urine specimens can take the place of theswabs in PCR testing for chlamydia.
文摘Objective: To analyze the causes of persistent infection of Chlamydia trachomatis in the urogenital system. Method: We followed 223 patients with Chlamydia trachomatis infection who were treated regularly. Result: After treatment, 22.87% of cases still tested positive. After one year and change of treatment regime,4.48% of cases remained positive, most of whom were female. Conclusion: The course of Chlamydia trachomatis infection in the urogenital system is varied. This diversity has many causes including immunocompetence the characteristics of chalmydia trchomatis infection and genetic resistance.
基金The Project was funded by the Department of Education,Jangsu Province(Fund Number: 00KJD310003).
文摘Objectives: To find out the level and functions of Chlamydia trachomatis heat shock protein (C-hsp60) antibody, anti-spermantibody(ASAb), interleukin 1(IL-1), interleukin 6 (IL-6),interleukin 8 (IL-8), Tumor necrosis factor alpha (TNF-α)and γ-interferon (IFN-γ) in patients with CT-related infertility. Methods: CT-DNA of cervical secretions was detectedthrough polymerase chain reaction (PCR) and migrationinhibiting factor (MIF) was employed to measure IgG titre ofCT MOMP antibody. Western blot was used to determinepresence of C-hsp60 antibody and enzyme-linkedimmunoadsorbent assay (ELISA) measured ASAb of IgG typein blood serum and determine the content of IL-1, IL-6. IL-8.TNF-α. IFN-γ in uterine tube fluid. Results: 68 patients had positive CT-DNA, among which 57(83.8%) had C-hsp60 antibody. Among the 172 patients withnegative CT-DNA, 64 patients (37.2%) also had C-hsp60Antibody. There was a significant difference (P<0.01) betweeninfertile patients and control group patients in the presence ofAAb. Infertile patients with positive CT-DNA had higher levels of IL-1、IL-6. IL-8. TNF-α. IFN-γ in uterine tube fluidcompared to control group patients (P<0.01). Conclusion: Firstly, those patients with negative CT testingfrom cervical secretions cannot be ruled out for CT infectionin deep parts of the body (such as oviduct, pelvic kidney).Detection of C-hsp60 Antibody may help to diagnose suchcases of CT. Secondly, CT infection of the oviduct can raiselevels of IL-1、IL-6、 IL-8、 TNF-α. IFN-γ. The pathogenesis ofinfertility caused by CT infection in the reproductive tractmay be related to cytokine production and inflammatoryresponses mediated by C-hsp60 Antibody, IL-1, IL-6, IL-8,TNF-α, and IFN-γ.
文摘Objective:To establish a rapid and simple assay for the diagnosis of Chlamydia trachomatis (CT) infection. Methods BALB/c mice were immunized with SDS-PAGE purified major outer membrane protein (MOMP) from CT and the monoclonal antibodies were obtained subsequently. Two-site ELISA was developed to detect CT infection. Results: The established assay was able to detect as low as 1.248ug/ml MOMP with interrun and inrun CV 6.9% and 3.1% respectively. 94% (34/36) of culture-positive samples were found to be positive in the current examination, indicating the high sensitivity of this assay. Conclusion: The assay is applicable for clinical diagnosis of CT infection.
文摘Object: To investigate the relationship between chlamydiatrachomatis (CT) and urogenital infection. Method Positive rate of CT in patients with inflammationof urogenital tract was significantly higher than those withoutinflammation(P<0.05). Result: There was statistical difference in the males nomatter they were patients with inflammation of urogenitaltract or not (P>H0.05), while there was no statistical differencein females (P>0.05). The incidence of the infection was highamong those aging from 21-50 years old. Conclusion: The clinical manifestations of CT infectionwere obscure, so we should examine CT in patients who haveno symptoms, especially in females and those of high-riskpopulation.
基金The State Key Program for Basic Research Grant (2005CB523004) The Knowledge InnovationProgram Key Project (KSCX1-YW-R-07).
文摘The nucleocapsid protein(N) is a major structural protein of coronaviruses. The N protein of bat SARS-like coronavirus(SL-CoV) has a high similarity with that of SARS-CoV. In this study,the SL-CoV N protein was expressed in Escherichia coli,purified and used as antigen. An Indirect Enzyme-Linked Immunosorbent Assay(indirect ELISA) was developed for detection of SARS-or SL-CoV infections in bat populations. The detection of 573 bat sera with this indirect ELISA demonstrated that SL-CoVs consistently circulate in Rhinilophus species,further supporting the proposal that bats are natural reservoirs of SL-CoVs. This method uses 1-2 μl of serum sample and can be used for preliminary screening of infections by SARS-or SL-CoV with a small amount of serum sample.
文摘Objectives: To evaluate the Vidas Chlamydia (CHL) assayfor detecting C.Trachomatis with swabs and first catch urine(FCU) specimens from STD patients and high riskpopulations. Methods: A total of 383 pahents were tested with tissueculture (TC), Vidas CHL and polymerase chain reaction (PCR)for C.trachomatis on male and female swabs, with Vidas CHLtesting male FCU specimens. CHL positive and equivocalresults were confirmed with a blocking assay (CHB). Truepositive were defined as either TC positive, or TC negtive butCHL and PCR positive. The performance of TC, CHL andPCR were evaluated according to this expanded goldstandard. Results: Compared with the expanded gold standard, 54 ofthe 232 male specimens were true positive results. For maleswabs, TC, CHL and PCR had sensitivities of 90.7%, 96.3%and 94.4%, and specificities of 100%, 98.3% and 97.2%,respectively. Differences were not statistically significant. Formale FCU specimens, CHL sensitivity and specificity were83.3% and 98.3%; there was little difference between theseresults and that of matched swabs. Compared with theexpanded gold standard, 28 of the 151 female swabs were truepositive; TC, CHL and PCR had sensitivities of 82.1%, 100%and 96.4%, and specificities of 100%, 98.4% and 97.6%,respectively. The difference was also not significant. Conclusions: Vidas CHL assay is very scnsitive and specificfor C.trachomatis detection with swab specimens of male andfemale STD patients. For male FCU specimens, the assay alsohad high sensitivity and specificity. CHB may not be needed inthe routine detection or Chlamydia infections. Populationswith higher incidence of C.trachomatis infection.