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Parnell LKS, Luke N, Mathur M, Festa RA, Haley E, Wang J, Jiang Y, Anderson L, Baunoch D. Elevated UTI Biomarkers in Symptomatic Patients with Urine Microbial Densities of 10,000 CFU/mL Indicate a Lower Threshold for Diagnosing UTIs. Diagnostics (Basel) 2023; 13:2688. [PMID: 37627948 PMCID: PMC10453813 DOI: 10.3390/diagnostics13162688] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/20/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
The literature lacks consensus on the minimum microbial density required for diagnosing urinary tract infections (UTIs). This study categorized the microbial densities of urine specimens from symptomatic UTI patients aged ≥ 60 years and correlated them with detected levels of the immune response biomarkers neutrophil gelatinase-associated lipocalin (NGAL), interleukin-8 (IL-8), and interleukin-1-beta (IL-1β). The objective was to identify the microbial densities associated with significant elevation of these biomarkers in order to determine an optimal threshold for diagnosing symptomatic UTIs. Biobanked midstream voided urine samples were analyzed for microbial identification and quantification using standard urine culture (SUC) and multiplex-polymerase chain reaction (M-PCR) testing, while NGAL, IL-8, and IL-1β levels were measured via enzyme-linked immunosorbent assay (ELISA). NGAL, IL-8, and IL-1β levels were all significantly elevated at microbial densities ≥ 10,000 cells/mL when measured via M-PCR (p < 0.0069) or equivalent colony-forming units (CFUs)/mL via SUC (p < 0.0104) compared to samples with no detectable microbes. With both PCR and SUC, a consensus of two or more elevated biomarkers correlated well with microbial densities > 10,000 cells/mL or CFU/mL, respectively. The association between ≥10,000 cells and CFU per mL with elevated biomarkers in symptomatic patients suggests that this lower threshold may be more suitable than 100,000 CFU/mL for diagnosing UTIs.
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Affiliation(s)
- Laura K. S. Parnell
- Department of Scientific Writing, Precision Consulting, 6522 Harbor Mist, Missouri City, TX 77459, USA;
| | - Natalie Luke
- Department of Clinical Research, Pathnostics, 15545 Sand Canyon Suite 100, Irvine, CA 92618, USA; (N.L.); (E.H.)
| | - Mohit Mathur
- Department of Medical Affairs, Pathnostics, 15545 Sand Canyon Suite 100, Irvine, CA 92618, USA;
| | - Richard A. Festa
- Department of Research and Development, Pathnostics, 15545 Sand Canyon Suite 100, Irvine, CA 92618, USA;
| | - Emery Haley
- Department of Clinical Research, Pathnostics, 15545 Sand Canyon Suite 100, Irvine, CA 92618, USA; (N.L.); (E.H.)
| | - Jimin Wang
- Department of Statistical Analysis, Stat4Ward, 2 Edgemoor Lane, Pittsburgh, PA 15238, USA; (J.W.); (Y.J.)
| | - Yan Jiang
- Department of Statistical Analysis, Stat4Ward, 2 Edgemoor Lane, Pittsburgh, PA 15238, USA; (J.W.); (Y.J.)
| | - Lori Anderson
- Department of Diagnostic Market Access, Pathnostics, 15545 Sand Canyon Suite 100, Irvine, CA 92618, USA;
| | - David Baunoch
- Department of Research and Development, Pathnostics, 15545 Sand Canyon Suite 100, Irvine, CA 92618, USA;
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Festa RA, Opel M, Mathur M, Luke N, Parnell LKS, Wang D, Zhao X, Magallon J, Percaccio M, Baunoch D. Quantitative multiplex polymerase chain reaction in copies ml-1 linearly correlates with standard urine culture in colonies ml-1 for urinary tract infection (UTI) pathogens. Lett Appl Microbiol 2023; 76:ovad085. [PMID: 37500537 DOI: 10.1093/lambio/ovad085] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 06/28/2023] [Accepted: 07/26/2023] [Indexed: 07/29/2023]
Abstract
Standard urine culture (SUC) is the current standard method for confirmation of a urinary tract infection (UTI). SUC identifies microorganisms in urine samples and semi-quantifies these as colony-forming units (CFUs) ml-1. In contrast, quantitative multiplex polymerase chain reaction (q-MPCR) is a culture-independent assay in which the microbes are quantified by targeting genomic sequences and reported as cells ml-1, calculated from copies ml-1. Using serial dilutions within the 104-105 cells ml-1 range, the usual reporting range of SUC, this study compared the quantification results based on SUC and q-MPCR for four uropathogens with the control hemocytometer counts. The results revealed a linear relationship and a 1:1 correlation between the q-MPCR and SUC results. Additional q-MPCR quantification of 36 uropathogenic non-fastidious and fastidious bacteria and yeast indicated a reproducible linear correlation in a 1:1 manner with the control counts over a range of cell densities (103-106 cells ml-1). The results confirm that the quantifications by q-MPCR in cells ml-1 and by SUC in CFUs ml-1 are comparable and answer to the lingering question of how the results of these two methods correlate. Moreover, q-MPCR provided accurate quantification of various microorganisms over wider cell density ranges without the time required for microbial growth.
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Affiliation(s)
| | - Mike Opel
- Pathnostics, Irvine, CA 92618, United States
| | | | | | | | - Dakun Wang
- Stat4ward, Pittsburgh, PA 15238, United States
| | - Xinhua Zhao
- Stat4ward, Pittsburgh, PA 15238, United States
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Parnell LKS, Tanaka R, Volk SW. Yoshikiyo Akasaka: Impact on wound healing across the globe. Wound Repair Regen 2022; 30:613-616. [DOI: 10.1111/wrr.13058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/29/2022] [Indexed: 11/24/2022]
Affiliation(s)
| | - Rica Tanaka
- Division of Regenerative Therapy, Graduate School of Juntendo University, Department of Plastic Surgery and Reconstructive Surgery Medical School of Juntendo University Tokyo Japan
| | - Susan W. Volk
- Department of Clinical Sciences and Advanced Medicine University of Pennsylvania School of Veterinary Medicine Philadelphia Pennsylvania USA
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McCarus SD, Parnell LKS. The Origin and Evolution of the HARMONIC® Scalpel. Surg Technol Int 2019; 35:201-213. [PMID: 31694060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
When Jacques and Pierre Curie first researched ultrasonic energy and piezoelectric effects in the 1880s, they likely had no idea of the profound impact it would eventually have on surgical patients. Today in operating rooms around the world, ultrasonic energy is used for tissue manipulation, dissection, cutting, and coagulation. Surgeons including but not limited to the specialties of gynecology, general surgery, colorectal, thoracic, breast, and bariatric have activated ultrasonic energy in thousands of patients. As a mainstay surgical energy device, patients have benefited from the ultrasonic versatility of its cutting and coagulating effects. The ability of ultrasonic energy to be used near vital organs with precision by adjusting for tissue tension, power settings, and activation time has accounted for its safety and clinical outcomes. This overview of the mechanics of ultrasonic energy and the evolution of the HARMONIC® (UltraCision, Providence, Rhode Island, now owned by Ethicon Endo-Surgery, Inc., Cincinnati, Ohio) surgical tools since 1988 provides readers an understanding of this energy platform and its distinct advantages. Clinical implications of key research and clinical studies are explored and discussed with a focus on patient and surgical outcomes. Research in a variety of fields and tissues is presented with a special emphasis on the gynecological patient.
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Affiliation(s)
- Steven D McCarus
- Minimally Invasive Surgery Advent Health Winter Park Winter Park, Florida
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Parnell LKS. Itching for Knowledge About Wound and Scar Pruritus. Wounds 2018; 30:17-36. [PMID: 29406293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Chronic itch continues to be a problem that plagues millions of humans and animals. Pruritus has a negative impact on patient quality of life and many patients experience sleep deprivation, anxiety, and depression, similar to patients with chronic pain. This review provides an overview of clinical pruritus research with special emphasis on itch that wound care providers may see. In addition, the need for using multifactorial questionnaires for better research in pruritus is summarized. Similarities and differences in itch characteristics, triggers, and relievers in various patient populations are discussed. A brief overview of itch receptors and pathways is provided to help the reader better understand the complexity of the resultant itch sensation. Also, some nonpharmacological and pharmacological antipruritic therapies and their mechanisms of action are included.
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Theoret CL, Olutoye OO, Parnell LKS, Hicks J. Equine exuberant granulation tissue and human keloids: a comparative histopathologic study. Vet Surg 2013; 42:783-9. [PMID: 24015864 DOI: 10.1111/j.1532-950x.2013.12055.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 07/21/2013] [Indexed: 01/27/2023]
Abstract
OBJECTIVE To compare histopathologic features of a fibroproliferative disorder in horses (exuberant granulation tissue-EGT) and people (keloid). SAMPLE POPULATION Archival tissue samples of EGT (n = 8) and keloid (12). METHODS After automated hematoxylin and eosin, histochemical (Gomori trichrome, Verhoeff-van Gieson elastin) and immunohistochemical (vimentin, α-smooth muscle actin, CD34, CD68, CD117) stainings, tissue sections were evaluated using a semi-quantitative grading scale for presence or absence of ulceration, keloidal collagen, myofibroblasts, and elastic fibers as well as degree of inflammation, fibrosis, vascularity, and orientation of collagen fibers. RESULTS Superficial dermis and deep dermis of both horses and people had increased numbers of haphazardly oriented thickened collagen fibers; however, only keloids contained "keloidal" collagen. Fibroblast numbers were markedly increased in both groups but only EGT had myofibroblasts. Minimal vascularity was observed in the deep dermis of both groups. The superficial dermis in EGT was characterized by small vessels within immature granulation tissue. Macrophages and mast cells were infrequently found in both groups but polymorphonuclear cells were markedly increased in EGT. CONCLUSIONS Humans and horses are the only mammals known to naturally develop excessive granulation during wound healing; however, similarities and differences between fibroblast populations and associated collagen have not been reported. Inflammatory response may contribute to observed differences in the cellular populations, with EGT possessing markedly increased myofibroblasts, small vessels, and acute inflammatory cells compared with keloids. Further work is warranted to develop common treatment strategies for these fibroproliferative conditions.
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Carter MJ, Fylling CP, Parnell LKS. Use of platelet rich plasma gel on wound healing: a systematic review and meta-analysis. Eplasty 2011; 11:e38. [PMID: 22028946 PMCID: PMC3174862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Autologous platelet rich plasma is an advanced wound therapy used in hard-to-heal acute and chronic wounds. To better understand the use and clinical outcomes of the therapy, a systematic review of the published literature in cutaneous wounds was performed. METHODS Electronic and hand searches for randomized controlled trials and comparative group studies using platelet rich plasma therapy in cutaneous wounds and published over the last 10 years was conducted. Eligible studies compared the treatment to standard care or other interventions. All citations were screened and eligible studies were assessed for validity, quality, and bias using accepted scoring methods. The primary outcomes were effect of platelet rich plasma and control wound care on wound healing and related healing measurements. Secondary outcomes related to healing such as infection, pain, exudate, adverse events, and quality of life were also considered. The meta-analysis utilized appropriate statistical methods to determine the overall treatment effect on chronic and acute wound healing and infection. RESULTS The search terms resulted in 8577 citations and after removing duplicates and screening for protocol eligibility, a total of 24 papers were used. The meta-analysis of chronic wound studies revealed platelet rich plasma therapy is significantly favored for complete healing. The meta-analysis of acute wounds with primary closure studies demonstrated that presence of infection was reduced in platelet rich plasma treated wounds. CONCLUSIONS This systematic review and meta-analysis of platelet rich plasma therapy in cutaneous wounds showed complete and partial wound healing was improved compared to control wound care.
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Abstract
Excessive levels of matrix metalloproteinases (MMPs) are present in chronic wounds preventing wound closure. Reducing detrimental components may be key in healing chronic wounds. Elta Protease-containing wound dressings have been observed clinically to resolve inflammation and appear to aid healing in acute and chronic recalcitrant wounds. To investigate possible mechanisms of action, in vitro tests, zymography, collagenase assays and enzyme-linked immunosorbent assays (ELISAs), were performed to evaluate the effect of the dressing proteases on detrimental and beneficial wound healing components such as MMPs, Tissue Inhibitor of Matrix Metalloproteinases (TIMPs), cytokines and growth factors. Standards of pro- and active MMP-2, MMP-9 and chronic wound fluid (CWF) were prepared. Degradation of target proteins was enhanced by increased Elta Protease concentration, temperature and incubation time. Incubation with serial dilutions of the Elta Proteases resulted in nearly complete degradation of all MMP standards. After a 30-minute incubation, twofold diluted Elta Proteases degraded >90% of the gelatinases in CWF. ELISAs showed that Elta Proteases effectively degraded MMP-9 and tumour necrosis factor (TNF-alpha). In contrast, Platelet Derived Growth Factor (PDGF) and interleukin 1 beta were resistant to degradation by Elta Proteases. These results suggest that Elta Protease dressings appear to deactivate detrimental components in CWF, which may reduce wound bed contact with harmful proteins.
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Affiliation(s)
- Brett Baskovich
- Department of Obstetrics and Gynecology, University of Florida, Gainesville, FL, USA
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Parent-Vachon M, Parnell LKS, Rachelska G, Lasalle L, Nedelec B. Cross-cultural adaptation and validation of the Questionnaire for Pruritus Assessment for use in the French Canadian burn survivor population. Burns 2008; 34:71-92. [PMID: 17624677 DOI: 10.1016/j.burns.2007.01.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2006] [Accepted: 01/22/2007] [Indexed: 11/28/2022]
Abstract
BACKGROUND Severe pruritus after burn continues to be a clinical challenge. To address this challenge, thorough documentation of burn survivors' itch experience is required. A "Questionnaire for Pruritus Assessment" has been developed to capture the sensory and affective experiences associated with itch as well as its functional and quality of life implications, but to evaluate the Quebec burn survivor population, a Canadian French version is required. Thus, the purpose of this study was to generate a Canadian French cross-cultural adaptation of the questionnaire suitable for the burn survivor population. METHODS Cross-cultural adaptation followed six steps: forward translation into Canadian French, back translations into English, resolution between the two versions, synthesis of the Canadian French versions, revision by a committee of experts, and testing of the pre-final version. RESULTS The adaptation process resolved issues surrounding translation, content validity, burn survivor-specific modifications, and format, resulting in a Canadian French pre-final version that was pilot-tested among 32 burn survivors. Content validity of the Canadian French version was assessed by a committee of experts and the participants. The results showed good item completion and adequate distribution of scores without a ceiling or floor effect. CONCLUSIONS This study resulted in a Canadian French version of the "Questionnaire for Pruritus Assessment" that can confidently be compared to other investigations utilizing the same tool. The adapted questionnaire also provides a valuable data collection means, enabling more thorough documentation of the burn survivor itch experience.
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Affiliation(s)
- M Parent-Vachon
- School of Physical and Occupational Therapy, McGill University, Montréal, Québec, Canada
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Parnell LKS. Up close and personal with deep vein thrombosis. Ostomy Wound Manage 2006; 52:66-72. [PMID: 16565527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Deep vein thrombosis - the formation of clots in one of the body's deep veins (usually in the lower extremities) - develops as a result of vascular damage to the vein wall, venous stasis, and hypercoagulability (Virchow's triad). Among the many problems it can cause, the condition can escalate the challenge of healing a chronic wound. If a patient presents with pain, swelling, warmth, muscle cramps, and/or redness, the clinician should consider deep vein thrombosis, even if the patient does not initially appear to be at risk. Because approximately 2 million Americans have deep vein thrombosis every year (including otherwise healthy adults, the elderly, and persons with and without a history of venous insufficiency), prompt attention to symptoms is warranted. Diagnosis takes into consideration risk factors such as hypercoagulability, estrogen contraception, and Factor V Leiden mutation and is confirmed via compression ultrasonography and duplex ultrasound. Management includes anticoagulation therapy and thrombolytic therapy; prevention focuses on avoiding long periods of sitting, wearing compression hose when necessary and, for persons at risk, prophylactic anticoagulant therapy. Prescribed bedrest as a result of deep vein thrombosis provided one clinician/patient who did not consider herself to be at risk the opportunity to explore the condition in depth.
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