scholarly journals Comprehensive Redox Profiling of the Thiol Proteome ofClostridium difficile

2018 ◽  
Vol 17 (5) ◽  
pp. 1035-1046 ◽  
Author(s):  
Susanne Sievers ◽  
Silvia Dittmann ◽  
Tim Jordt ◽  
Andreas Otto ◽  
Falko Hochgräfe ◽  
...  
2013 ◽  
Vol 158 (9) ◽  
pp. 706 ◽  
Author(s):  
Bradley C. Johnston ◽  
Joshua Z. Goldenberg ◽  
Gordon H. Guyatt

1994 ◽  
Vol 5 (4) ◽  
pp. 163-167 ◽  
Author(s):  
Marilyn Binning ◽  
Michael A John ◽  
Berend C Schieven ◽  
Thomas W Austin ◽  
Robert Lannigan ◽  
...  

Objective: The most common etiology of infectious diarrhea in hospitalized patients isClostridium difficile. No single laboratory test yields a definitive diagnosis. Four methods were evaluated for their sensitivity and specificity in patients who had clinically definedC difficile-associated diarrhea.Methods: Clinical criteria forC difficile-associated diarrhea were defined. All adult in-hospital patients whose stools were tested forC difficilewere prospectively followed. Stools were examined with culture on a selective medium, a commercial cytotoxicity assay (cta), and two commercially available enzyme immunoassays (eias) for toxin A (Meridian) and toxin AB (cbc).Results: During the study period 235 stool specimens from 185 patients were tested. Fifty-one patients were positive forC difficileor its markers,ctawas most sensitive (80%), whereascbc-eiawas most specific (98%). Differences in the sensitivities ofctaand Meridian-eiawere minor (80% versus 73.3%) and they were equally specific (95.5%).Conclusions: The sensitivity and specificity ofeiafor toxin A is similar to other tests. However, due to rapidity and ease of performance, it may be a more practical test for the diagnosis ofC difficile-associated diarrhea, especially if the cytotoxin assay is not available.


1994 ◽  
Vol 2 (4) ◽  
pp. 154-161 ◽  
Author(s):  
Steven E. Waggoner ◽  
James Barter ◽  
Gregorio Delgado ◽  
Willard Barnes

Objective:The incidence, morbidity, and risk factors associated withClostridium difficile-associated diarrhea (CDAD) were studied in a group of gynecologic oncology patients.Methods:A case-control analysis of gynecologic oncology patients with CDAD was carried out from August 1986 through January 1989 in a university medical center.Results:One hundred twenty-three stool samples were tested forC. difficileusing the CDT latex agglutination test (Marion Diagnostics, Kansas City, MO). Thirty episodes of CDAD developed in 23 patients. From August 1986 through July 1988, the incidence was stable at 1.5 episodes/100 admissions. From August 1988 through January 1989, the incidence increased to 9.9 episodes/100 admissions (P= 0.005). Compared with patients with nonspecific antibiotic-associated diarrhea, the study patients were hospitalized longer prior to the development of symptoms (mean 15.2 vs. 9.2 days,P= 0.006) and were admitted more frequently with diarrhea (37% vs. 11%,P= 0.015). The rates of surgery, chemotherapy, and radiation therapy were similar. Fever (57% vs. 14%,P< 0.001), abdominal pain (40% vs. 6%,P< 0.001), bloody stools (27% vs. 3%,P= 0.006), and leukocytosis (64% vs. 26%,P= 0.011) were more common among the study cases. The duration, indication, and number of antibiotics administered were similar, though once started, the mean time to symptoms was longer in the study cases (13.7 vs. 6.1 days,P= 0.004). Seven relapses, 1 death, and 1 unplanned colostomy occurred among women with CDAD.Conclusions: C. difficileis a serious cause of nosocomial morbidity in gynecologic oncology patients. Diarrhea developing after antibiotic exposure is more likely to be associated withC. difficilein patients whose symptoms develop several days after completing antibiotics and in patients with a history of CDAD.


1995 ◽  
Vol 14 (12) ◽  
pp. 1109-1111 ◽  
Author(s):  
T. V. Riley ◽  
R. A. Bowman ◽  
C. L. Golledge ◽  
H. Humphreys ◽  
S. P. Bordello ◽  
...  

2018 ◽  
Vol 87 (3) ◽  
Author(s):  
Lauren E. Hartley-Tassell ◽  
Milena M. Awad ◽  
Kate L. Seib ◽  
Maria Scarselli ◽  
Silvana Savino ◽  
...  

ABSTRACTClostridium difficileis a major cause of hospital-acquired antibiotic-associated diarrhea.C. difficileproduces two cytotoxins, TcdA and TcdB; both toxins are multidomain proteins that lead to cytotoxicity through the modification and inactivation of small GTPases of the Rho/Rac family. Previous studies have indicated that host glycans are targets for TcdA and TcdB, with interactions thought to be with both α- and β-linked galactose. In the current study, screening of glycan arrays with different domains of TcdA and TcdB revealed that the binding regions of both toxins interact with a wider range of host glycoconjugates than just terminal α- and β-linked galactose, including blood groups, Lewis antigens,N-acetylglucosamine, mannose, and glycosaminoglycans. The interactions of TcdA and TcdB with ABO blood group and Lewis antigens were assessed by surface plasmon resonance (SPR). The blood group A antigen was the highest-affinity ligand for both toxins. Free glycans alone or in combination were unable to abolish Vero cell cytotoxicity by TcdB. SPR competition assays indicate that there is more than one glycan binding site on TcdB. Host glycoconjugates are common targets of bacterial toxins, but typically this binding is to a specific structure or related structures. The binding of TcdA and TcdB is to a wide range of host glycans providing a wide range of target cells and tissuesin vivo.


2014 ◽  
Vol 55 (4) ◽  
pp. 994 ◽  
Author(s):  
John Jeongseok Yang ◽  
You Sun Nam ◽  
Min Jin Kim ◽  
Sun Young Cho ◽  
Eunkyung You ◽  
...  

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