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Veterinary Laboratory Medicine: Small and Exotic Animals, An Issue of Clinics in Laboratory Medicine, E-Book

Veterinary Laboratory Medicine: Small and Exotic Animals, An Issue of Clinics in Laboratory Medicine, E-Book

Kent Balanis Lewandrowski

(2015)

Abstract

This issue of Clinics in Laboratory Medicine provides approaches and diagnostic techniques relating to the assessment of small and exotic animals. Topics covered include: Clinical Approach to Advanced Renal Function Testing in Dogs and Cats; A Laboratory Diagnostic Approach to Hepatobiliary Disease in Small Animals; Diagnosis of Small Intestinal Disorders in Dogs and Cats; Practical Interpretation and Application of Exocrine Pancreatic Testing in Small Animals; Using Cardiac Biomarkers in Veterinary Practice; Use of Lactate in Small Animal Practice; Diagnosis of Disorders of Iron Metabolism in Dogs and Cats; Making Sense of Lymphoma Diagnostics in Small Animal Patients; Hematology of Domestic Ferret; Hematological Assessment in Pet Rabbits: Blood Sample Collection and Blood Cell Identification; Hematological Assessment in Pet Rats, Mice, Hamsters, and Gerbils: Blood Sample Collection and Blood Cell Identification; Hematological Assessments in Pet Guinea Pigs: Blood Sample Collection and Blood Cell Identification; Avian Hematology; Reptile Hematology; Fish Hematology and Associated Disorders; Evaluation of the Blood Film.

Table of Contents

Section Title Page Action Price
Front Cover Cover
Veterinary Laboratory Medicine: Small and Exotic \rAnimals i
Copyright\r ii
Contributors iii
AUTHORS iii
Contents v
Clinical Approach to Advanced Renal Function Testing in Dogs and Cats\x0B v
A Laboratory Diagnostic Approach to Hepatobiliary Disease in Small Animals\r v
Diagnosis of Small Intestinal Disorders in Dogs and Cats\r v
Practical Interpretation and Application of Exocrine Pancreatic Testing in Small Animals\r v
Using Cardiac Biomarkers in Veterinary Practice\r vi
Use of Lactate in Small Animal Clinical Practice\r vi
Diagnosis of Disorders of Iron Metabolism in Dogs and Cats\r vi
Making Sense of Lymphoma Diagnostics in Small Animal Patients\r vi
Hematology of the Domestic Ferret (Mustela putorius furo)\r vi
Hematological Assessment in Pet Rabbits: Blood Sample Collection and Blood Cell Identification\r vii
Hematologic Assessment in Pet Rats, Mice, Hamsters, and Gerbils: Blood Sample Collection and Blood Cell Identification\r vii
Hematological Assessment in Pet Guinea Pigs (Cavia porcellus): Blood Sample Collection and Blood Cell Identification\r vii
Avian Hematology\r vii
Reptile Hematology\r viii
Fish Hematology and Associated Disorders\r viii
Evaluation of the Blood Film\r viii
Erratum ix
Clinical Approach to Advanced Renal Function Testing in Dogs and Cats 487
Key points 487
GLOMERULAR FILTRATION RATE 487
URINARY FRACTIONAL EXCRETION OF ELECTROLYTES 489
URINARY BIOMARKERS OF KIDNEY INJURY 492
Commercially Available Urinary Biomarkers of Renal Injury 492
Urine albumin/microalbuminuria 492
Urine Îł-glutamyl transpeptidase:creatinine ratio 494
Selected Investigational Urinary Biomarkers of Renal Injury 495
Cystatin C 495
Interleukin 18 495
Kidney injury molecule-1 496
N-acetyl-β-D-glucosaminidase 496
Neutrophil gelatinase–associated lipocalin 496
Retinol binding protein 497
REFERENCES 497
A Laboratory Diagnostic Approach to Hepatobiliary Disease in Small Animals 503
Key points 503
TESTING AND REFERENCE INTERVALS 503
OVERVIEW OF HEPATIC ENZYMES 504
Alanine Aminotransferase 504
Aspartate Aminotransferase 507
Alkaline Phosphatase 507
Îł-Glutamyltransferase 507
Lactate Dehydrogenase 508
Bilirubin 510
Serum Bile Acids 511
Ammonia 512
Indirect Markers of Hepatobiliary Disease 513
HEMATOLOGY 514
URINALYSIS ABNORMALITIES SECONDARY TO HEPATIC DISEASE 514
CYTOLOGY 514
Neoplasia 515
Lipid and Nonlipid Vacuolar Change 516
Infectious and Inflammatory Disease 516
HISTOPATHOLOGY 517
REFERENCES 518
Diagnosis of Small Intestinal Disorders in Dogs and Cats 521
Key points 521
INTRODUCTION: DIAGNOSTIC WORKUP OF SMALL INTESTINAL DISORDERS 521
Differential Diagnoses for Acute Small Intestinal Diseases 522
Systemically well 522
Systemically unwell, abnormal abdominal palpation, severe diarrhea with hematochezia, melena, and frequent vomiting 522
DIAGNOSTIC WORKUP OF CHRONIC SMALL INTESTINAL DIARRHEA 523
Causes of Chronic Small Intestinal Disease 523
INTERPRETATION OF LABORATORY TESTS TO AID THE DIAGNOSIS OF CHRONIC SMALL INTESTINAL DIARRHEA 524
Serum Albumin Concentrations 524
Dogs 524
Practical Interpretation and Application of Exocrine Pancreatic Testing in Small Animals 535
Key points 535
INTRODUCTION 535
ACUTE PANCREATITIS IN THE DOG 536
Routine Clinical Pathology 536
Fluid Cytology 537
Serum Lipase and Amylase 538
Trypsinogen Activation Peptide 539
Trypsin-like Immunoreactivity 539
Canine Pancreatic Lipase 540
Serum Pancreatic Elastase 544
Determining Severity 546
ACUTE PANCREATITIS IN THE CAT 546
CHRONIC PANCREATITIS 548
PANCREATIC NEOPLASIA 548
Pancreatic Cytology 548
EXOCRINE PANCREATIC INSUFFICIENCY 548
REFERENCES 550
Using Cardiac Biomarkers in Veterinary Practice 555
Key points 555
INTRODUCTION: NATURE OF THE PROBLEM 555
CARDIAC TROPONIN 556
NATRIURETIC PEPTIDES 557
INDICATIONS FOR C-BNP AND NT-PROBNP TESTING 557
Differentiation of Cardiac Versus Noncardiac Causes of Respiratory Signs 558
Detection of Occult Cardiomyopathy in Doberman Pinschers and in Cats 559
Predicting Morbidity and Mortality in Dogs with Heart Disease 561
INDICATIONS FOR CARDIAC TROPONIN TESTING 562
LIMITATIONS OF CARDIAC BIOMARKERS 563
SUMMARY 564
REFERENCES 564
Use of Lactate in Small Animal Clinical Practice 567
Key points 567
INTRODUCTION 567
LACTATE PHYSIOLOGY AND METABOLISM 568
CLASSIFICATION OF LACTIC ACIDOSIS 569
SAMPLE COLLECTION AND LACTATE ANALYSIS 571
ANALYTICAL INTERFERENCES 572
DIAGNOSTIC APPLICATION OF LACTATE CONCENTRATION 572
Type A Lactic Acidosis 572
Type B Lactic Acidosis 573
D-Lactic Acidosis 574
LACTATE CONCENTRATION IN OTHER BODY FLUIDS 574
SUMMARY 574
REFERENCES 574
Diagnosis of Disorders of Iron Metabolism in Dogs and Cats 579
Key points 579
REVIEW OF NORMAL IRON METABOLISM 579
Function 579
Location 579
Plasma Iron 579
Regulation 580
ASSAYS USED IN THE ASSESSMENT OF IRON STATUS 581
Serum Iron Concentration 581
Ferritin 582
Transferrin 582
Percent Saturation 582
Tissue Iron Concentration 583
Other Assays Not Yet Available in Veterinary Medicine 583
ASSESSMENT OF IRON STATUS IN DISEASES ASSOCIATED WITH IRON METABOLISM 583
Iron Deficiency 583
Causation 583
Iron assays 584
Hematology 584
Reticulocyte indices 585
Iron-refractory iron deficiency 585
Anemia of Inflammation (Anemia of Chronic Disease) 586
Causation 586
Iron assays 587
Hemochromatosis 587
Causation 587
Making Sense of Lymphoma Diagnostics in Small Animal Patients 591
Key points 591
INTRODUCTION 591
CYTOLOGY 592
Lymphocyte Morphology 593
Diagnosis of Lymphoma by Cytology 593
Supporting Cytologic Features 594
Staging of Lymphoma by Cytology 594
Limitations of Cytology 594
Sample Requirements 594
HISTOPATHOLOGY 596
Hematology of the Domestic Ferret (Mustela putorius furo) 609
Key points 609
METHODOLOGY FOR BLOOD COLLECTION 610
Restraint 610
Manual restraint 610
Chemical restraint 610
Blood Collection Sites: Location and Preparation, and Venipuncture Techniques 610
Volume Collected 611
MORPHOLOGY AND NUMBERS OF PERIPHERAL BLOOD CELLS 612
Erythrocytes (Red Blood Cell) 613
Thrombocytes (Platelets) 613
Leukocytes (White Blood Cells) 614
Neutrophils 614
Lymphocytes 614
Eosinophils 614
Basophils 614
Monocytes 614
REFERENCES 614
Hematological Assessment in Pet Rabbits 617
Key point 617
METHODOLOGY FOR BLOOD COLLECTION 617
Restraint 617
Blood Collection Sites—Location and Preparation, and Venipuncture Techniques 618
Volume Collected 620
Handling of the Blood Sample 620
MORPHOLOGY AND NUMBERS OF PERIPHERAL BLOOD CELLS 621
Erythrocytes 621
Thrombocytes (Platelets) 621
Leukocytes (White Blood Cells) 621
Neutrophils 622
Lymphocytes 623
Eosinophils 624
Basophils 624
Monocytes 624
INTERPRETATION OF THE HEMOGRAM 624
Erythrocytes 624
Thrombocytes 625
Leukocytes 625
REFERENCES 626
Hematologic Assessment in Pet Rats, Mice, Hamsters, and Gerbils 629
Key points 629
BIOSAFETY AND OCCUPATIONAL HEALTH CONSIDERATIONS FOR CLINIC STAFF 630
METHODOLOGY FOR BLOOD COLLECTION 630
Restraint 630
Manual restraint 630
Mice 630
Rats 632
Gerbils 632
Hamsters 632
Chemical restraint 632
Blood Collection Sites in Rats, Mice, Gerbils, and Hamsters: Location, Preparation, and Venipuncture Techniques 633
Collection from tail veins 633
Collection from ventral caudal artery 633
Collection from hindlimb vessels 634
Blood Volume Collected 634
MORPHOLOGY AND NUMBERS OF PERIPHERAL BLOOD CELLS 635
Erythrocytes 635
Thrombocytes (Platelets) 635
Leukocytes (White Blood Cells) 637
Neutrophils 637
Lymphocytes 637
Eosinophils 638
Basophils 638
Monocytes 638
REFERENCES 639
Hematological Assessment in Pet Guinea Pigs (Cavia porcellus) 641
Key points 641
METHODOLOGY FOR BLOOD COLLECTION 642
Restraint 642
Blood Collection Sites: Location and Preparation, and Venipuncture Techniques 642
Volume Collected 644
MORPHOLOGY AND NUMBERS OF PERIPHERAL BLOOD CELLS 644
Erythrocytes 644
Thrombocytes (Platelets) 646
Leukocytes (White Blood Cells) 646
Neutrophils (Heterophils) 646
Lymphocytes 646
Eosinophils 646
Basophils 646
Monocytes 646
Kurloff Cells 647
REFERENCES 647
Reptile Hematology 661
Key points 661
INTRODUCTION 661
RESTRAINT AND BLOOD COLLECTION TECHNIQUES 662
General Comments 662
Snakes 662
Lizards 663
Chelonians 664
Crocodilians 666
SAMPLE ANALYSIS 666
Erythrocytes 666
Leukocytes 668
FACTORS AFFECTING THE NORMAL HEMOGRAM 672
Demographics 672
Biological Activity 672
Season and Environmental Conditions 672
Restraint 673
DISORDERS OF HEMATOLOGY 673
Erythrocytic Disorders 673
Anemia 673
Polycythemia 674
Inclusions 674
Leukocytic Disorders 674
Leukocytosis 675
Leukopenia 675
Inclusions/hemoparasites 675
ACKNOWLEDGMENTS 676
REFERENCES 676
Fish Hematology and Associated Disorders 681
Key points 681
INTRODUCTION 681
BLOOD COLLECTION 682
Restraint Techniques 682
Venipuncture Sites 683
Sample Handling 685
HEMATOLOGIC EVALUATION 685
Erythrocyte Structure and Function 685
Packed Cell Volume 686
Red Blood Cell Indices 686
Leukocyte Structure and Function 688
Thrombocytes 690
Complete Blood Count (Hemacytometer) 690
Blood Smear and Differential 691
Interpretation of Results 691
REFERENCES 698
Evaluation of the Blood Film 703
Key points 703
ERYTHROCYTES 705
LEUKOCYTES 710
ACQUIRED CHANGES IN LEUKOCYTE MORPHOLOGY 714
THROMBOCYTES AND PLATELETS 714
BLOOD PARASITES OF BIRDS 716
BLOOD PARASITES AND RED CELL INCLUSIONS OF HERPTILES (REPTILES AND AMPHIBIANS) 717
BLOOD PARASITES OF FISH 719
REFERENCES 719