scholarly journals 749. A Nurse-Driven Protocol for Early Detection of Clostridiodes difficile Infections

2021 ◽  
Vol 8 (Supplement_1) ◽  
pp. S471-S472
Author(s):  
Shannon Beckman ◽  
Jonathan Chia ◽  
Bethany Stibbe ◽  
Monica Rykse ◽  
Michael S Wang

Abstract Background Clostridiodes difficile infections (CDI) are a significant cause of hospital acquired infections, resulting in significant morbidity and mortality. Early detection of CDI has been shown to reduce the spread of CDI within the hospital. As nurses are frequently at the patient’s bedside, we proposed to empower the nursing staff to assess, collect stool samples, and order C. difficile testing. Methods Rates of CDI were measured by our Infection Control Department. Hospital-onset CDI (HO-CDI) was defined as a positive C. difficile PCR assay after 3 days of admission, defined as a stay of at least 3 midnights. Community-onset CDI (CO-CDI) was defined as any case that was diagnosed in the Emergency Department or inpatient ward < 3 days of hospitalization based on stool testing as above. Nursing was instructed and empowered to assess, collect stool specimens, and place an order for C. difficile testing, based on the criteria of ≥3 loose or watery stools over 24 hours. Nursing was also educated to not order a test if patients had received stool softeners, enemas, or laxatives within 24 hours. The protocol was initiated in February 2019. Results Rates of HO-CDI increased during the intervention period, rising from 2.6 cases/10000 patient days and peaking at 17.7 cases/10000 patient days (average 6.7 vs. 12.1 monthly cases per 10,000 patient days. Rates of CO-CDI did not significantly change (12.4 vs. 11.5 monthly cases per 10000 patient days). Due to concerns of inappropriate testing, which included testing after laxatives, enemas, or sending specimens despite < 3 stools over 24 hours, the protocol was discontinued in June 2019. Although the HO-CDI rate remained elevated over the next month, the rate subsequently decreased over the next several months (12.1 vs. 8.0 cases per 10000 patient days). Overall testing also increased over the study period (148.3 vs. 169.9 cases/per 10000 patient days).Figure 1 - Clostridiodes difficile rates Figure 2 - CDI testing rates Conclusion A nursing driven protocol resulted in increased HO-CDI and overall CDI rates suggesting that the intervention may have been a factor in increasing the frequency of HO-CDI diagnoses, although the possibility of misdiagnosis of colonization for true CDI cannot be excluded. Further education of nursing staff may be a potential intervention in improving appropriate CDI testing. Disclosures All Authors: No reported disclosures

2017 ◽  
Vol 55 (10) ◽  
pp. 3123-3129 ◽  
Author(s):  
Michael J. Mashock ◽  
Matthew L. Faron ◽  
Blake W. Buchan ◽  
Nathan A. Ledeboer

ABSTRACT Liquid-based microbiology (LBM) devices incorporating flocked swabs and preservation medium ease transport of specimens and improve specimen yield compared to traditional fiber wound swabs; however, the performance of LBM collection devices has not been evaluated in many molecular assays. It is unclear how the differences in matrix and specimen loading with an LBM device will affect test performance compared to traditional collection devices. The purpose of this study was to evaluate the performance of specimens collected in FecalSwab transport medium (Copan Diagnostics, Murrieta, CA) compared to unpreserved stool using the Cepheid Xpert C. difficile assay (Cepheid, Sunnyvale, CA). Results equivalent to unpreserved stool samples were obtained when 400 μl of FecalSwab-preserved stool was employed in the Xpert assay. The positive and negative percent agreement of specimens inoculated with FecalSwab medium ( n = 281) was 97.0% (95% confidence interval [CI], 90.9 to 96.4%) and 99.4% (95% CI, 96.4 to 99.9%), respectively, compared to reference results obtained using unpreserved stool. Throughout this study, only four discrepant results occurred when comparing preserved specimens to unpreserved stool specimens in the Xpert C. difficile PCR assay. Post discrepant analysis, using the BD MAX Cdiff assay, the specificity and sensitivity both increased to 100%. The high positive and negative percent agreements observed in this study suggest that stool preserved in FecalSwab media yields equivalent results to using unpreserved stool when tested on the Xpert C. difficile assay, allowing laboratories to adopt this liquid-based microbiology collection device.


Viruses ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 159
Author(s):  
Robert A. Kozak ◽  
Candace Rutherford ◽  
Melissa Richard-Greenblatt ◽  
N. Y. Elizabeth Chau ◽  
Ana Cabrera ◽  
...  

Hepatitis A virus (HAV) is an emerging public health concern and there is an urgent need for ways to rapidly identify cases so that outbreaks can be managed effectively. Conventional testing for HAV relies on anti-HAV IgM seropositivity. However, studies estimate that 10–30% of patients may not be diagnosed by serology. Molecular assays that can directly detect viral nucleic acids have the potential to improve diagnosis, which is key to prevent the spread of infections. In this study, we developed a real-time PCR (RT-PCR) assay to detect HAV RNA for the identification of acute HAV infection. Primers were designed to target the conserved 5′-untranslated region (5′-UTR) of HAV, and the assay was optimized on both the Qiagen Rotor-Gene and the BD MAX. We successfully detected HAV from patient serum and stool samples with moderate differences in sensitivity and specificity depending on the platform used. Our results highlight the clinical utility of using a molecular assay to detect HAV from various specimen types that can be implemented in hospitals to assist with diagnostics, treatment and prevention.


1995 ◽  
Vol 31 (5-6) ◽  
pp. 371-374 ◽  
Author(s):  
R. Gajardo ◽  
R. M. Pintó ◽  
A. Bosch

A reverse transcription polymerase chain reaction (RT-PCR) assay is described that has been developed for the detection and serotyping of group A rotavirus in stool specimens and concentrated and non-concentrated sewage specimens.


Pathogens ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 188
Author(s):  
Tanja Hoffmann ◽  
Andreas Hahn ◽  
Jaco J. Verweij ◽  
Gérard Leboulle ◽  
Olfert Landt ◽  
...  

This study aimed to assess standard and harsher nucleic acid extraction schemes for diagnostic helminth real-time PCR approaches from stool samples. A standard procedure for nucleic acid extraction from stool and a procedure including bead-beating as well as proteinase K digestion were compared with group-, genus-, and species-specific real-time PCR assays targeting helminths and nonhelminth pathogens in human stool samples. From 25 different in-house and commercial helminth real-time PCR assays applied to 77 stool samples comprising 67 historic samples and 10 external quality assessment scheme samples positively tested for helminths, higher numbers of positive test results were observed after bead-beating-based nucleic acid extraction for 5/25 (20%) real-time PCR assays irrespective of specificity issues. Lower cycle threshold values were observed for one real-time PCR assay after the standard extraction scheme, and for four assays after the bead-beating-based scheme. Agreement between real-time PCR results after both nucleic acid extraction strategies according to Cohen’s kappa ranged from poor to almost perfect for the different assays. Varying agreement was observed in eight nonhelminth real-time PCR assays applied to 67 historic stool samples. The study indicates highly variable effects of harsh nucleic acid extraction approaches depending on the real-time PCR assay used.


2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Corinne Légeret ◽  
Céline Rüttimann ◽  
Hans Fankhauser ◽  
Henrik Köhler

Abstract Background A wide variation of causes can lead to gastrointestinal symptoms in children- an infection with parasites is one of them. The expansion of international travel might lead to an increase in testing children for a correspondent infection. Currently there are no guidelines available, which patients should be tested for a possible parasitical infection. The aim of the study was to characterize Swiss children suffering from intestinal parasites, in order to provide more knowledge for the clinician who should be tested. Methods This is a retrospective study of Swiss pediatric patients, whose stools have been tested for parasites and helminths. Results A total of 1855 stool samples, belonging to 572 different children with an average age of 7.9 years, were tested within a 10-year period. The prevalence of a positive result was 4.2%, of which all were positive for Blastocystis, and 12.5% had a co-infection with Endolimax nana. Conclusion Immigrants, immune compromised children with diarrhea and pediatric patients with bloody or protracted diarrhea should have 2 different stool specimens examined for a possible parasitical infection.


2021 ◽  
Vol 14 (6) ◽  
Author(s):  
Khouloud Ben-Rhouma ◽  
Salma Feki Ben-Salah ◽  
Nada Boulehmi ◽  
Aida Bouratbine

Background: Yeast naturally colonize the mammalian digestive tract and play an important role in health and disease. This community is composed of commensal yeasts, mostly Candida and Saccharomyces described as a part of the intestinal mycobiome and could be associated with resident or transient flora. Objectives: The aim of our study was to perform the phenotypic and genotypic characterization of culturable Candida isolates present in stool specimens of healthy Tunisian individuals and to evaluate their antifungal susceptibility. Methods: Yeasts were recovered from 46 stool samples cultured on Sabouraud dextrose agar at 37°C. Species were identified using conventional methods and ITS-PCR sequencing. Candida isolates were tested by exploring their tolerance to oxidative stress and extreme acidic conditions. In addition, their biofilm formation ability and in vitro resistance to antifungals was determined by the VITEK 2 system. Results: The identification by sequencing the ITS1-5.8S-ITS2 region of the 56 yeast strains isolated from 37 stool samples revealed that Candida was the dominant genus and was represented by Candida albicans (n = 21), C. parapsilosis (n = 10), C. glabrata (n = 9), and C. krusei (n = 9). In contrast, the other genera, including trichosporon, geotrichum, and rhodotorula, were sporadically occurring. We found that most Candida strains were able to form biofilms under oxidative stress and extreme pH conditions. Regarding antifungal susceptibility, a higher resistance rate to fluconazole was revealed in comparison to caspofungin and micafungin. However, nonresistance was revealed against voriconazole, amphotericin B, and 5-flucytosine. Conclusions: This is the first work-generated data on cultivable yeasts from stool specimens of healthy individuals in Tunisia. Further metagenomic studies with a larger sample size are needed to better characterize the intestinal mycobiota.


Author(s):  
Enas Sh. Khater ◽  
Abd Alazim A. Al- Faki

Clostridium difficile infections (CDIs) is considered healthcare-associated infections which cause watery diarrhea to long stayed hospitalized patients and cause increased mortality rate. Aim: Detection of the prevalence and risk factors of C. difficile in Al Quwayiyah General hospital, Riyadh, Kingdom of Saudi Arabia and compairing between GeneXpert® PCR assay and Quikchek complete-enzyme imunoassay QCC, (QCC-EIA) in detection of C. difficile infection and toxicity Materials and Methods: A cross sectional and prospective study was performed for one year started from June 2019 to June 2020. The data collected include demographic, laboratory and clinical data. A total of 104 stool samples were collected from patients presented with diarrhea. GeneXpert® PCR assay and Quikchek complete-enzyme imunoassay QCC (QCC-EIA) were conducted to each stool sample. Results: Only 15(14.4%) of the 104 studied patients had CDI while 89 (85.6%) were non CDI patients, 13 (86.7%) of the CDI patients were males and 2 (13.3%) were females with mean age for CDI cases 61 (±19.9), while non CDI cases involved 55(61.8%) were males and 34 (38.2%) were females with mean age for cases of non CDI, 60 (±18.7) years. Of the CDI and non CDI cases respectively 12 (80%) and 14(15.7%) had fever, 5 (27%) and 6 (6.7%) had vomitting and 7 (46.7%) and 12 (13.5%) of cases had abdominal pain. There was statistical significant difference between patients with fever while no statistical significant difference regarding vomitting and abdominal pain. There was statistical significant difference between patients with peptic ulcers, patients received proton pump inhibitors and patients received broad-spectrum antibiotics, while There was no statistical significant difference between cardiac disease, cerebrovascular disease, diabetes, pulmonary disease, hepatic disease and Renal disease. Gene expert PCR detected 15/104(14.4%) as positive CDI while QCC-EIA detected 21/104 (20.5%) as positive CDI. On comparison between gene expert PCR technique and QCC-EIA the sensitivity of QCC-EIA was 100%, while the specificity was 91%. The Positive Predictive Value was 74%, while the Negative Predictive Value was 100%. Conclusion: The C. difficile infection prevalence rate in the hospital was 14.4%. There was statistical significant difference between patients with peptic ulcers, patients received proton pump inhibitors and patients received broad-spectrum antibiotics. The QCC-EIA can be used as a screening test for the detection of C. difficile toxin in stool samples but should be confirmed with a PCR assay or another confirmatory test Due to its decreased specificity.


Author(s):  
Mojtaba SHAHNAZI ◽  
Farzaneh NAGHIZADEH ◽  
Elham HAJIALILO ◽  
Safar Ali ALIZADEH ◽  
Mehrzad SARAEI ◽  
...  

Background: We aimed to investigate the genotypes of Giardia intestinalis among the food handlers in Qazvin, Iran. Methods: Overall, 1530 stool specimens were collected from the food handlers who visited Shahid Bolandian Health Center, Qazvin, Iran during 2016. Specimens were evaluated by microscopic and concentration methods. Twenty specimens with appropriate number of giardia cysts were selected followed by DNA extraction. Determination of giardia genotypes was achieved through PCR and sequencing the glutamate dehydrogenase gene. The phylogenetic tree was drawn using the MEGA7 software. Finally, the data were analyzed statistically with a P-value<0.05 was considered as significant. Results: Twenty stool samples (1.3%) were positive for Giardia cyst. All positive specimens were obtained from male participants with abdominal cramp being their most common symptoms. The mean age for infected individuals was 32 yr. Molecular characterization was successfully performed for 17 isolates and two genotypes A (AII, 65%) and B (BIII, 35%) were identified. Conclusion: The most prevalent giardia genotypes among the food handlers in Qazvin were A (AII) and B (BIII) genotypes with A (AII) genotype as the dominant one in the region. Considering the direct association between the food handlers and public health as well as the impact of geographical and host conditions on dispersion and pathogenicity of various genotypes and their zoonotic aspects, further investigations are necessary.


2016 ◽  
Vol 10 (2) ◽  
pp. 58-64
Author(s):  
Arwa Mujahid Abdullah Al-Shuwaikh

Diarrhea is a major cause of illness and death in children worldwide; however, little information exists about the origin of childhood diarrhea in Iraq. Rotavirus, Adenovirus and Astrovirus are the major causes of sever gastroenteritis in infant and young children, pattern also observed in adult. Confirmation of viral infection by laboratory testing is necessary for reliable surveillance and can be useful in clinical settings to avoid inappropriate use of antimicrobial therapy. Methods: A total of 188 patients their age range from 1-19 (Mean=5.57 ± S.D. = 4.81) years old suffering from diarrhea were included in this study. Stool samples were collected and tested for Rotavirus, Adenovirus and Astrovirus antigens by using the rapid chromatographic test and for Rotavirus and Adenovirus Antigens, ELISA also was done. Rotavirus, Adenovirus and Astrovirus antigens were determined by rapid chromatographic immunoassay in 27 specimens (14.36%), 0 (0%) and 0 (0%) of 188 frozen stool specimens, respectively. Moreover, of these 188 specimens, Rotavirus was found in 35 specimens (18.62%) and Adenovirus in 6 specimens (3.19 %) by using ELISA technique. The present results revealed that Rotaviruses and Adenoviruses have an important role in diarrhea among children especially those less than 5 year’s old and viral pathogens should be investigated routinely in diarrhea stool specimens. This study was aimed to determine the frequency of Rotavirus, Adenovirus and Astrovirus in patients with acute gastroenteritis admitted to Al-Emamain Al-Kadhemain Medical City Hospital in Baghdad-Iraq.


2018 ◽  
Vol 39 (11) ◽  
pp. 1330-1333 ◽  
Author(s):  
Erik R. Dubberke ◽  
Kimberly A. Reske ◽  
Tiffany Hink ◽  
Jennie H. Kwon ◽  
Candice Cass ◽  
...  

AbstractObjectiveTo determine the prevalence of Clostridium difficile colonization among patients who meet the 2017 IDSA/SHEA C. difficile infection (CDI) Clinical Guideline Update criteria for the preferred patient population for C. difficile testing.DesignRetrospective cohort.SettingTertiary-care hospital in St. Louis, Missouri.PatientsPatients whose diarrheal stool samples were submitted to the hospital’s clinical microbiology laboratory for C. difficile testing (toxin EIA) from August 2014 to September 2016.InterventionsElectronic and manual chart review were used to determine whether patients tested for C. difficile toxin had clinically significant diarrhea and/or any alternate cause for diarrhea. Toxigenic C. difficile culture was performed on all stool specimens from patients with clinically significant diarrhea and no known alternate cause for their diarrhea.ResultsA total of 8,931 patients with stool specimens submitted were evaluated: 570 stool specimens were EIA positive (+) and 8,361 stool specimens were EIA negative (−). Among the EIA+stool specimens, 107 (19% of total) were deemed eligible for culture. Among the EIA− stool specimens, 515 (6%) were eligible for culture. One EIA+stool specimen (1%) was toxigenic culture negative. Among the EIA− stool specimens that underwent culture, toxigenic C. difficile was isolated from 63 (12%).ConclusionsMost patients tested for C. difficile do not have clinically significant diarrhea and/or potential alternate causes for diarrhea. The prevalence of toxigenic C. difficile colonization among EIA− patients who met the IDSA/SHEA CDI guideline criteria for preferred patient population for C. difficile testing was 12%.


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