Infections, Pharmacotherapy, Gastrointestinal, Pancreatic, and Endocrine Pathophysiology

Comprehensive vocabulary flashcards reviewing key concepts, pathology, pharmacology, and clinical signs across antimicrobial therapy, gastrointestinal pathology, pancreatic disorders, and endocrine diseases.

Innate Immunity

The body's non-specific, natural defense mechanisms that are present prior to exposure and act to prevent invading pathogens from causing infection.

Adaptive Immunity

The acquired immune response characterized by the ability to recognize specific antigens and deploy specialized lymphocytes and antibodies.

Disk Diffusion Test

A laboratory method in which antibiotic-impregnated paper discs are placed on an agar plate inoculated with bacteria to determine microbial susceptibility based on zones of inhibited growth.

Superinfection

A secondary infection that emerges during antimicrobial therapy for a primary infection, typically caused by drug-resistant pathogens proliferating after normal protective flora is eradicated.

Beta-Lactamases

Bacterial enzymes that inactivate beta-lactam antibiotics by hydrolyzing and cleaving the core beta-lactam ring structure.

ESKAPE Pathogens

An acronym designated for a group of major nosocomial, multidrug-resistant bacterial pathogens: Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter spp.

MecA Gene

A specific bacterial genetic marker of antimicrobial resistance used in clinical laboratory testing to rapidly identify resistant organisms, particularly methicillin-resistant Staphylococcus aureus (MRSA).

Vancomycin Infusion-Related Reaction (VIRR)

A non-allergic histamine-mediated reaction triggered by rapid intravenous administration of vancomycin, manifesting with cutaneous flushing, rash, pruritus, tachycardia, and hypotension; avoided by infusing over at least 60 minutes.

Irritable Bowel Syndrome (IBS)

A functional gastrointestinal disorder of bidirectional brain-gut interaction characterized by recurrent abdominal pain associated with altered bowel motility and stool patterns, in the absence of structural defects.

Rome IV Criteria

Standardized diagnostic criteria for IBS requiring recurrent abdominal pain occurring at least 1 day per week over the last 3 months with symptom onset at least 6 months prior, coupled with two or more features related to defecation or changes in stool frequency and form.

Linaclotide (Linzess)

A guanylate cyclase-C (GC-C) agonist used in IBS with constipation (IBS-C) that elevates cyclic GMP levels, driving chloride and bicarbonate secretion into the intestinal lumen to accelerate transit.

Rifaximin (Xifaxan)

A non-systemic, rifamycin-derived oral antibiotic that inhibits bacterial RNA synthesis within the gastrointestinal tract, utilized for diarrhea-predominant IBS (IBS-D) and hepatic encephalopathy.

Diverticulosis

The clinical condition of having acquired saclike outpouchings or herniations (diverticula) of the mucosal and submucosal layers through weak muscular points in the intestinal wall, most commonly in the sigmoid colon.

Diverticulitis

Inflammation and micro-perforation of one or more colonic diverticula, frequently triggered by obstruction from inspissated fecal matter or undigested food particles.

Ulcerative Colitis

A chronic inflammatory bowel disease marked by continuous, diffuse mucosal inflammation and ulcerations restricted to the colon and rectum, beginning in the rectum and progressing proximally.

Crohn's Disease

A chronic inflammatory bowel disease involving discontinuous, transmural inflammation across any segment of the GI tract, characterized by 'skip lesions', deep fissures, and a cobblestone mucosal appearance.

Celiac Disease

An autoimmune enteropathy precipitated by dietary gluten ingestion in genetically susceptible individuals, leading to immunologic damage of the small intestinal mucosa, villous flattening/atrophy, and crypt hyperplasia.

Appendicitis

Acute inflammation of the vermiform appendix initiated by luminal obstruction from fecaliths, lymphoid hyperplasia, or foreign bodies, precipitating vascular compromise, ischemia, and potential gangrene or perforation.

Peritonitis

Acute or chronic inflammation of the peritoneal serous membrane lining the abdominal wall and pelvic cavity, classically presenting with severe abdominal pain, rebound tenderness, and involuntary 'board-like' muscular rigidity.

Dimorphic Fungi

Fungi that exist in two distinct morphological states depending on ambient temperature, growing as filamentous molds in external environments and converting to single-celled yeasts at core body temperature.

Amphotericin B

A systemic polyene antifungal medication that binds ergosterol in fungal cell membranes to form transmembrane ion channels; noted for high incidence of infusion rigors and nephrotoxicity ('Amphoterrible').

Herpes Zoster

A painful, unilateral dermatomal cutaneous eruption and radicular pain caused by reactivation of the latent varicella-zoster virus (VZV) within the sensory dorsal root ganglia.

Oseltamivir (Tamiflu)

An oral neuraminidase inhibitor antiviral agent used for influenza treatment that provides optimal therapeutic benefit when administered within 48 hours of initial symptom onset.

Pancreatitis

An inflammatory condition of the pancreas resulting from premature intracellular activation of digestive zymogens and subsequent autodigestion of pancreatic parenchyma and surrounding structures.

Grey Turner's Sign

Flank ecchymosis and discoloration resulting from retroperitoneal blood tracking through fascial planes, indicative of severe acute necrotizing pancreatitis.

Cullen's Sign

Superficial periumbilical ecchymosis caused by tracking of retroperitoneal hemorrhagic exudate into the subcutaneous tissues around the navel.

Pancreatic Pseudocyst

An organized, encapsulated accumulation of fluid rich in pancreatic enzymes, blood, and necrotic debris surrounded by a non-epithelial fibrous wall of granulation tissue.

SIADH (Syndrome of Inappropriate Antidiuretic Hormone)

An endocrine disorder characterized by excessive or autonomous secretion of antidiuretic hormone (ADH), driving excessive renal water retention, intravascular expansion, and dilutional hyponatremia.

Diabetes Insipidus (DI)

A water balance disorder stemming from central deficiency of ADH secretion (neurogenic) or renal tubular insensitivity to ADH (nephrogenic), manifesting with copious dilute polyuria and polydipsia.

Cushing Syndrome

The clinical condition resulting from prolonged systemic exposure to excessive levels of glucocorticoids, characterized by central adiposity, a moon face, buffalo hump, purple cutaneous striae, and muscle wasting.

Addison's Disease

Primary adrenocortical hypofunction marked by autoimmune or infectious destruction of the adrenal cortex, causing deficient cortisol and aldosterone secretion, cutaneous hyperpigmentation, hypotension, and hyperkalemia.

Addisonian Crisis

An acute, life-threatening emergency of severe adrenal insufficiency precipitated by physiologic stressors, trauma, or sudden withdrawal of chronic exogenous glucocorticoids, resulting in cardiovascular collapse and shock.

Pheochromocytoma

A rare catecholamine-secreting neuroendocrine chromaffin tumor located in the adrenal medulla, classically presenting with severe hypertension, episodic headaches, diaphoresis, and palpitations.

Myxedema Coma

An end-stage, life-threatening clinical state of profound decompensated hypothyroidism manifested by depressed consciousness, hypothermia without shivering, hypoventilation, bradycardia, and hypotension.

Graves' Disease

An autoimmune disorder in which thyroid-stimulating immunoglobulins target and continuously activate TSH receptors, resulting in diffuse toxic goiter, hyperthyroidism, and ophthalmopathy.

Exophthalmos

Abnormal protrusion of the globes anteriorly from the orbits, caused by lymphocyte-mediated inflammation, edema, and accumulation of glycosaminoglycans within extraocular tissues in Graves' disease.

Hypoparathyroidism

Subnormal parathyroid hormone (PTH) secretion, most commonly secondary to inadvertent excision or devascularization during anterior neck surgery, producing hypocalcemia, hyperphosphatemia, and neuromuscular tetany.

Hyperparathyroidism

Excessive production of parathyroid hormone (PTH) resulting in sustained hypercalcemia, hypophosphatemia, osteopenia, pathologic bone resorption, and nephrolithiasis.