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Histopathology and Laboratory Features of Sexually Transmitted Diseases
Histopath & Labs for STIs Endo, Energy and Repro 2017-2018 HISTOPATHOLOGY AND LABORATORY FEATURES OF SEXUALLY TRANSMITTED DISEASES Dominck Cavuoti, D.O. Phone: 469-419-3412 Email: [email protected] LEARNING OBJECTIVES: • Identify the etiologic agents causing pelvic inflammatory disease and the pathologic changes they produce. • Discuss the characteristic clinical and pathologic findings caused by herpes simplex virus (HSV) infections: a. fever blisters b. genital herpes simplex virus infection c. disseminated neonatal HSV • Describe the pathologic changes produced by Treponema pallidum. • Describe the clinical features and pathologic changes produced by Chlamydia trachomatisand Neisseria gonorrhoeae • Describe the clinical and laboratory features of vaginal infections including: Trichomonas, Candida, and bacterial vaginosis. • Describe the clinical and laboratory features of ectoparasite infections PURPOSE OF THE LECTURE: 1. To describe the various agents of sexually transmitted diseases and their disease manifestations 2. To describe the pathologic features associated with STDs 3. To introduce some of the laboratory aspects of STDs TERMS INTRODUCED IN LECTURE: Condyloma lata Disseminated gonococcal infection Gummatous syphilis Lymphogranuloma venereum Pelvic inflammatory disease Rapid Plasma Reagin (RPR) Salpingitis Syphilis/endarteritis obliterans Venereal Disease Research Laboratory (VDRL) Treponema pallidum particle agglutination (TPPA) Histopath & Labs for STIs Endo, Energy and Repro 2017-2018 MAJOR CONCEPTS EMPHASIZED IN LECTURE I. Syphilis (Will be covered by Dr. Norgard in later lecture). II. Gonorrhea A. Causative agent: Neisseria gonorrhoeae, a Gram negative diplococcus. Humans are the only natural reservoir. Infection is acquired via direct contact with the mucosa of an infected person. The incubation period averages 2-5 days with a range of 1-14 days. -
• Cytosis: O Neutrophilia: Defined As an Increase in the Neutrophilic Count in the Peripheral Blood Above Reference Range for Age
HENATOLYMPHOID SYSTEM THIRD YEAR MEDICAL STUDENTS-UNIVERSITY OF JORDAN AHMAD T. MANSOUR, MD NONNEOPLASTIC DISEASES OF THE WHITE BLOOD CELLS • There are five major types of WBCs in the blood: neutrophils, lymphocytes, eosinophils, basophils and monocytes. • The normal function of the white blood cells depends on a tight regulation of their count and their function. Therefore, disease develops if there is a derangement of the cells count or function, it takes one of the following forms: o Cytosis: increase in the number of circulating cells above reference range. (Note: leukocytosis means an increase in the WBC count, neutrophilia means increase in the neutrophilic count, lymphocytosis means increase in the lymphocytic count, monocytosis means increase in the monocytic count, basophilia means increase in the basophilic count and eosinophilia means in crease in the eosinophilic count). o Cytopenia: decrease in the number of circulating cells below reference range. (Note: neutropenia means decreased neutrophils, lymphocytopenia, or simply lymphopenia, means decrease in lymphocytes, monocytopenia means decrease in monocytes, eosinopenia means decrease in eosinophils, and basopenia means decrease in basophils). o Abnormal or absent function • Cytosis: o Neutrophilia: defined as an increase in the neutrophilic count in the peripheral blood above reference range for age. o Causes: bacterial infection is the most common and most important etiology. Tissue necrosis in cases of burns or trauma and medications such as epinephrine and corticosteroids are also additional causes for neutrophilia. § Some physiologic conditions can lead to neutrophilia such as stress, smoking and pregnancy. o Pathophysiology: neutrophils are present in the blood in two populations: circulating and marginal (meaning neutrophils stuck to the vessel wall). -
Francisella Tularensis 6/06 Tularemia Is a Commonly Acquired Laboratory Colony Morphology Infection; All Work on Suspect F
Francisella tularensis 6/06 Tularemia is a commonly acquired laboratory Colony Morphology infection; all work on suspect F. tularensis cultures .Aerobic, fastidious, requires cysteine for growth should be performed at minimum under BSL2 .Grows poorly on Blood Agar (BA) conditions with BSL3 practices. .Chocolate Agar (CA): tiny, grey-white, opaque A colonies, 1-2 mm ≥48hr B .Cysteine Heart Agar (CHA): greenish-blue colonies, 2-4 mm ≥48h .Colonies are butyrous and smooth Gram Stain .Tiny, 0.2–0.7 μm pleomorphic, poorly stained gram-negative coccobacilli .Mostly single cells Growth on BA (A) 48 h, (B) 72 h Biochemical/Test Reactions .Oxidase: Negative A B .Catalase: Weak positive .Urease: Negative Additional Information .Can be misidentified as: Haemophilus influenzae, Actinobacillus spp. by automated ID systems .Infective Dose: 10 colony forming units Biosafety Level 3 agent (once Francisella tularensis is . Growth on CA (A) 48 h, (B) 72 h suspected, work should only be done in a certified Class II Biosafety Cabinet) .Transmission: Inhalation, insect bite, contact with tissues or bodily fluids of infected animals .Contagious: No Acceptable Specimen Types .Tissue biopsy .Whole blood: 5-10 ml blood in EDTA, and/or Inoculated blood culture bottle Swab of lesion in transport media . Gram stain Sentinel Laboratory Rule-Out of Francisella tularensis Oxidase Little to no growth on BA >48 h Small, grey-white opaque colonies on CA after ≥48 h at 35/37ºC Positive Weak Negative Positive Catalase Tiny, pleomorphic, faintly stained, gram-negative coccobacilli (red, round, and random) Perform all additional work in a certified Class II Positive Biosafety Cabinet Weak Negative Positive *Oxidase: Negative Urease *Catalase: Weak positive *Urease: Negative *Oxidase, Catalase, and Urease: Appearances of test results are not agent-specific. -
Biofire Blood Culture Identification System (BCID) Fact Sheet
BioFire Blood Culture Identification System (BCID) Fact Sheet What is BioFire BioFire BCID is a multiplex polymerase chain reaction (PCR) test designed to BCID? identify 24 different microorganism targets and three antibiotic resistance genes from positive blood culture bottles. What is the purpose The purpose of BCID is to rapidly identify common microorganisms and of BCID? antibiotic resistance genes from positive blood cultures so that antimicrobial therapy can be quickly optimized by the physician and the antibiotic stewardship pharmacist. It is anticipated that this will result in improved patient outcomes, decreased length of stay, improved antibiotic stewardship, and decreased costs. When will BCID be BCID is performed on all initially positive blood cultures after the gram stain is routinely performed and reported. performed? When will BCID not For blood cultures on the same patient that subsequently become positive with be routinely a microorganism showing the same morphology as the initial positive blood performed? culture, BCID will not be performed. BCID will not be performed on positive blood cultures with gram positive bacilli unless Listeria is suspected. BCID will not be performed on blood culture bottles > 8 hours after becoming positive. BCID will not be performed between 10PM-7AM on weekdays and 2PM-7AM on weekends. BCID will not be performed for clinics that have specifically opted out of testing. How soon will BCID After the blood culture becomes positive and the gram stain is performed and results be available? reported, the bottle will be sent to the core Microbiology lab by routine courier. BCID testing will then be performed. It is anticipated that total turnaround time will generally be 2-3 hours after the gram stain is reported. -
Interpreting and Acting on Positive Blood Cultures Trevor Van Schooneveld, MD 1/18/18 Objectives
Stewardship Interventions: Interpreting and Acting on Positive Blood Cultures Trevor Van Schooneveld, MD 1/18/18 Objectives • Interpret the results of blood cultures including gram stains and rapid pathogen diagnostic tests • Make recommendations regarding antimicrobial therapy based on interpretation of blood culture data Early Initiation of Active Therapy is Essential Predicted hospital mortality and 95% CIs for time to first antibiotic administration Surviving Sepsis Guidelines (N=28,150 severe sepsis, septic shock patients) • Administer IV antimicrobials within one hour of presentation (strong) • Initiate empiric, broad-spectrum therapy with one or more agents to cover all likely pathogens (strong) Ferrer R, et al. Crit Care Med. 2014;42:1749-55. Rhodes A, et al. Crit Care Med. 2017;45:486-552. De-escalation Also is Important Surviving Sepsis Guidelines • Narrow empiric antibiotics once pathogen identified and/or clinical improvement De-escalation Benefit • De-escalation in severe sepsis, septic shock (N=712) • Mortality OR 0.54 (95% CI 0.33-0.89, P=.016) • De-escalation in community-onset gram-negative bacteremia (N=189) • Mortality OR 0.37 (0.14-0.96, P=.04) Garnarcho-Montero J, et al. Intensive Care Med. 2014;40:32-40. Lee C, et al. Diag Micro Infect Dis. 2015;82:158-64. Issues with Treatment of Sepsis/Bacteremia Under-treatment • May die (mortality) • May not get better as quickly (LOS, cost) • May develop complications (LOS, cost) Overtreatment • May develop toxicities (cost, LOS) • May develop C. difficile (cost, LOS, readmission) -
BLOOD CULTURE MEDIA Principle: Specimen: Reagent Preparation Storage: Procedure
BLOOD CULTURE MEDIA For In-Vitro and professional use only Store at (2° to 8°C) Blood cultures are used to detect the presence of bacteria or fungi in the blood, to identify the type present, and to guide treatment. Testing is used to identify a blood infection (septicemia) that can lead to sepsis, a serious and life-threatening complication. Individuals with a suspected blood infection are often treated in intensive care units, so testing is often done in a hospital setting. A bacterial infection in the blood called bacteremia. It can be serious because the blood can spread the bacteria to any part of the body. Blood infections most often occur with other serious infections such as those affecting the lungs, kidneys, bowel, gallbladder, or heart valves. Blood infections may also develop when the immune system is weak in infants and older adults, from disease (such as cancer or AIDS) or from medicines (such as corticosteroids or chemotherapy) that change the ability of your body to fight infections (immunity). Principle: The vials containing 25 ml or 50 ml of brain heart infusion, yeast extract, SPS and other stabilizers. The Media is used for yeast, aerobic and anaerobic organisms in blood. The principle of the this test is that each type of organisms need a certain time to grow and multiply. Specimen: Blood. Reagent preparation The vials are ready to use. Storage: Store reagent from (2 - 8 oC). Procedure: 1. Bottles of Brain Heart Infusion which are not used the same day as sterilized should be placed in a boiling water bath for several minutes to remove absorbed oxygen , and cooled rapidly without shaking , just before use. -
Gram Stain Workshop for the Laboratory Generalist
Gram Stain Workshop for the Laboratory Generalist Karen Stiles, SM(ASCP)CM State Training Coordinator Assistant Chemical Terrorism Coordinator Nebraska Public Health Laboratory 402-559-3590 [email protected] 1 GRAM STAIN OBJECTIVES: Upon completion, the participant will be able to: 1. Explain the principle of the Gram stain procedure, including what elements can affect staining results 2. Correlate the most common pathogens with positive Gram stains from blood cultures and direct specimen sterile body fluid smears 3. Perform and interpret Grams stains 2 Purpose of Gram Stain Classify bacteria based on form, size, cellular morphology, Gram reaction Assess quality of specimen Identify specific infectious agent from morphology and Gram reaction Correlation with culture growth Correlation with culture-independent methodologist Guide presumptive antibiotic therapy 3 Principle of Gram Stain Cell wall composition Gram positive – think peptidoglycan layer with teichoic acid Gram negative – high in lipid content Basic premise Crystal Violet – all cells take up primary stain Gram’s iodine – mordant to form complex Decolorizer – mixture of acetone and alcohol Dehydrate lipids in Gram negative cell walls, wash out complex Gram positive cells resistant, retain stain complex Safranin - counterstain 4 Gram negative cells take up counterstain Preparation of Samples Specimen Type Preparation CSF/sterile body fluids Cyto/Centrifuge Blood Culture Broth Drop to slide Tissue Touch prep Tissue homogenate Drop to slide Swabbed material Roll -
Complete Blood Count in Primary Care
Complete Blood Count in Primary Care bpac nz better medicine Editorial Team bpacnz Tony Fraser 10 George Street Professor Murray Tilyard PO Box 6032, Dunedin Clinical Advisory Group phone 03 477 5418 Dr Dave Colquhoun Michele Cray free fax 0800 bpac nz Dr Rosemary Ikram www.bpac.org.nz Dr Peter Jensen Dr Cam Kyle Dr Chris Leathart Dr Lynn McBain Associate Professor Jim Reid Dr David Reith Professor Murray Tilyard Programme Development Team Noni Allison Rachael Clarke Rebecca Didham Terry Ehau Peter Ellison Dr Malcolm Kendall-Smith Dr Anne Marie Tangney Dr Trevor Walker Dr Sharyn Willis Dave Woods Report Development Team Justine Broadley Todd Gillies Lana Johnson Web Gordon Smith Design Michael Crawford Management and Administration Kaye Baldwin Tony Fraser Kyla Letman Professor Murray Tilyard Distribution Zane Lindon Lyn Thomlinson Colleen Witchall All information is intended for use by competent health care professionals and should be utilised in conjunction with © May 2008 pertinent clinical data. Contents Key points/purpose 2 Introduction 2 Background ▪ Haematopoiesis - Cell development 3 ▪ Limitations of reference ranges for the CBC 4 ▪ Borderline abnormal results must be interpreted in clinical context 4 ▪ History and clinical examination 4 White Cells ▪ Neutrophils 5 ▪ Lymphocytes 9 ▪ Monocytes 11 ▪ Basophils 12 ▪ Eosinophils 12 ▪ Platelets 13 Haemoglobin and red cell indices ▪ Low haemoglobin 15 ▪ Microcytic anaemia 15 ▪ Normocytic anaemia 16 ▪ Macrocytic anaemia 17 ▪ High haemoglobin 17 ▪ Other red cell indices 18 Summary Table 19 Glossary 20 This resource is a consensus document, developed with haematology and general practice input. We would like to thank: Dr Liam Fernyhough, Haematologist, Canterbury Health Laboratories Dr Chris Leathart, GP, Christchurch Dr Edward Theakston, Haematologist, Diagnostic Medlab Ltd We would like to acknowledge their advice, expertise and valuable feedback on this document. -
Blood Culture Sampling Policy for Adult and Paediatric Patients
Blood Culture Sampling Policy for Adult and Version: 7.0 Paediatric Patients Date Issued: 25 July 2018 Review Date: 30 May 2021 Document Type: Policy Contents Page Paragraph Executive Summary / Policy Statement / Flowchart 2 1 Scope and Purpose 2 2 Definitions 2 3 Indications for taking a blood culture and procedure 4 4 Roles and Responsibilities 7 5 Related Trust Policies 8 6 Implementation (including training and dissemination) 8 7 Process for Monitoring Compliance/Effectiveness of 9 this Policy 8 Arrangements for Review of this Policy 9 9 References 9 Appendices Page Appendix A List of equipment needed for peripheral blood culture 10 sampling Appendix B ANTT clinical guideline for Blood Culture Sampling 10 Appendix C ANTT clinical guideline for Blood Culture Sampling 10 from a CVC Device without a Transducer Appendix D ANTT clinical guideline for Blood Culture Sampling 10 from a CVC Device with a Transducer Appendix E Paediatric ANTT guideline for Blood Culture Sampling 10 from a CVC device Document Status This is a controlled document. Whilst this document may be printed, the electronic version posted on the intranet is the controlled copy. Any printed copies of this document are not controlled. As a controlled document, this document should not be saved onto local or network drives but should always be accessed from the intranet. Page 1 of 11 Executive Summary Blood cultures are used to detect the cause of a bloodstream infection. The result provides a guide to the appropriate treatment of the patient. False positives may occur if micro- organisms from a site outside of the bloodstream are introduced into the sample of blood obtained for culture which can then result in inappropriate antibiotic therapy and a waste of healthcare resources. -
Anemic Syndrome and White Blood Cells Disorders
27. 11. 2020 Anemic syndrome and white blood cells disorders Kristína Repová, M.D., PhD. [email protected] Institute of Pathophysiology, Faculty of Medicine, Bratislava Prepared exclusively for the purposes of distance education at the Faculty of Medicine, Comenius University in Bratislava in 2020/21 Hematopoeisis • Hematopoietic organs: • Bone marrow: • forming of erythrocytes, granulocytes, monocytes, thrombocytes, partially lymphocytes • Thymus: • forming of T-lymphocytes • Lymphatic nodes, tonsils, spleen: • forming of B-lymphocytes lymphoid multipotent stem cell pluripotent progenitor cell precursor cell stem cell myleoid multipotent stem cell 1 27. 11. 2020 Hematopoeisis 3 Pluripotent hematopoietic stem cell (self-renewal) Myeloid multipotent Lymphoid multipotent stem cell stem cell Megacaryocyte and Granulocyte and T-cell and NK B-cell erythroid progenitor Macrophage progenitor cell progenitor progenitor Megacaryocyte Erythrocyte Granulocyte Monocyte progenitor progenitor progenitor progenitor (CFU-Meg) (CFU-E) (CFU-G) (CFU-M) Myeloblast NK-cell Proerythroblast Monoblast Lymphoblast Lymphoblast Promyelocyte Megacaryoblast Erythroblast Myelocyte Promonocyte Prolymphocyte Prolymphocyte Megacaryocyte Reticulocyte Metamyelocyte Monocyte T-cell B-cell Thrombocyte Erythrocyte Band cell Basophil Eosinophil Macrophage Dendritic cell Neutrophil 2 27. 11. 2020 I. Disorders of red blood cells II. Disorders of white blood cells III. Myeloproliferative and lymphoproliferative disorders I. Disorders of red blood cells 1. Anemia 2. -
Blood Culture
CHI Health Laboratory 4955 F Street Omaha, NE 68117 Phone: 402-717-5227 Fax: 402-717-5252 BLOOD CULTURE Determine the type of culture bottles to utilize, as indicated per physician's order. If necessary, discuss timing of cultures, sites, need for any special instructions with the physician. Alegent Creighton Laboratory Blood Culture tube guide Optimal Age Group Bottle Distribution Difficult draw Volume Infant (Neonate -1 Bactec® Peds Plus 1-3 ml All into Peds bottle N/A yr old Child (1-5 yrs) Bactec® Peds Plus 1-5 ml All into Peds bottle N/A Bactec® Aerobic 8 ml into Aerobic bottle, the Child (6-8 yrs), < 8 ml, entire specimen and Anaerobic 10 ml remaining into the under 80 lbs in Aerobic Bottle bottles Anaerobic bottle 8 ml into Aerobic Adults > 8 yrs old Bactec® Aerobic bottle, the remaining 10 ml Aerobic bottle and children > 80 and Anaerobic 20 ml into Anaerobic bottle 10 ml Anaerobic bottle lbs bottles <8 ml entire specimen into Aerobic bottle Bactec® Myco/F All ages 3-5 ml All into Fungal bottle 3 ml minimum bottle BLOOD CULTURE BOTTLE STORAGE REQUIREMENTS: The Bactec blood culture bottles are ready for use as received and require no reconstitution or dilution. Store vials upright, in a cool, dry place (2-25°C), out of direct light. SPECIMEN COLLECTION: 1. Types of Blood Cultures available a. Routine blood culture b. Fungus blood culture c. Acid Fast blood culture d. CMV blood culture 2. Number and Timing - Most cases of bacteremia are detected by using 2 sets of blood cultures, collected separately. -
(BCID) Results Are “Not Detected”
Interpretation of Positive Blood Cultures When PCR Blood Culture Identification (BCID) Results are “Not Detected” Nebraska Medicine currently uses a multi-plex PCR-based blood culture identification (BCID) system that is able to identify 19 potential pathogens growing in blood culture. BCID generally detects over 90% of the most common causative agents in bloodstream infections; however, when microbes not included on the panel are present in a blood culture, it returns a result of “Not Detected.” This document aims to provide guidance in these scenarios supported by data collected at Nebraska Medicine from January 2018 to August 2019. Table 1: Recommendations for treatment of patients with blood cultures growing organisms not detected on BCID Gram Stain/Preliminary Likely Organism (% total BCID negative)* Recommended Treatment Culture Result Gram-positive: Aerobe Micrococcus sp. (18.1%) (most can also grow in Coagulase-negative Staphylococcus (9.3%) None anaerobic bottles) Diphtheroids (7%) None Peptostreptococcus sp. (4.4%) If therapy is desired: Anaerobe bottle only Lactobacillus sp. (2.6%) Metronidazole 500 mg PO q8h Clostridium sp. (2.6%) OR Penicillin G 4 million units IV q4h Gram-negative: Aerobe Acinetobacter sp. (1.8%) (most can also grow in Stenotrophomonas maltophilia (1.6%) Levofloxacin 750 mg IV/PO q24h anaerobic bottles) Pseudomonas fluorescens-putida group (1%) Bacteroides fragilis group (9.3%) Anaerobe bottle only Metronidazole 500 mg IV/PO q8h Fusobacterium sp. (4.7%) *A full list of isolated organisms can be found below in Table 2 Orange text = Cocci, Blue text = Bacilli (rods) Gram-Positives When BCID results as “Not Detected” but there is microbial growth, the organism is most frequently gram-positive (71%).