Dr. Rai Muhammad Asghar Head of Paediatric Department BBH Rawalpindi
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1 Dr. Rai Muhammad Asghar Head of Paediatric Department BBH Rawalpindi
2 Acute Post streptococcal Glomerulonephritis
3 Sudden onset of Gross hematuria Edema Hypertension Renal insufficiency
4 Cause of AGN Post infectious (Gp A B sterp) Vasculitis HS purpura SLE Microscopic polyarteritis Polyarteritis nodosa IgA nephropathy Antiglomerular basement membrane disease
5 Post streptococcal Glomerulonephritis Triad of Acute nephritic syndrome Evidence of recent strep infection Low C3 level
6 ETIOLOGY and EPIDEMIOLOGY Infection of the throat or skin by nephrogenic strains of group A beta hemolytic sterptococci Commonly follows streptococcal pharyngitis during cold weather months and sterptococcal skin infections or pyoderma during warm weather
7 Pharyngitis Pyoderma Strep type Gp A (12) Gp A (49) Climate Temperature / Cold Hot, tropical Season Wniter / spring Summer / fall Incubation period 1-2 wks 3-6 wks Sex incidence B:G 2:1 Equal
8 PATHOLOGY Light microscopy: Enlarged and bloodless glomeruli Diffuse mesangial proliferation with increase in mesangial matrix Polymorphonuclear leukocytes Crescent and interstitial inflammation
9 Immunofluorescene microscopy Lumpy Bumpy deposits of immunoglobulin and complement on GBM and in the mesangium Electron Microscopy Electron dense deposits, or humps are observed on epithelial of the GBM
10 PATHOGENISES Exact mechanism not known Morphological studies and depression in the serum complement (C3) level strongly suggest immune mediated illness
11 CLINICAL MANIFESTATIONS Age 5-15 year Incubation period: 1-2 weeks after pharyngitis 3-6 weeks after pyoderma Hematuria either asymptomatic microscopic with normal renal function or Gross hematuria with acute renal failure Oliguria Edema Hypertension Hypertensive encephalopathy
12 Edema result from salt and water retention and nephrotic syndrome may develop in 10-20% case Malaise, lethargy, abdominal or flank pain and fever are common Acute subglottic edema and airway compromise Acute phase resolve within 6-8 weeks, urinary protein excretion and hypertension normalize by 4-6 weeks, persistent microscopic hematuria may persist for 1-2 years after initial presentation
13 INVESTIGATIONS Urine R/E Red blood cells Red blood cells cast Proteinuria Leukocytes Renal function Test Serum electrolytes Hyponatermia and hyperkalemia Serum calcium CXR
14 Evidence of invasive streptococcal infection Throat culture Raising antibody titre to streptococcal antigen Streptozyme Test Complement C3 level low Complete Blood count Hemoglobin Low Total and differential count usually within normal limits Retics Raised ESR- Raised
15 Indication for Renal Biopsy Acute renal failure Nephrotic syndrome Absence of evidence of streptococcal infection Normal complement level Hematuria, Proteinuria, diminished renal function and or a low C3 level persist more than 2 months after onset
16 Differential Diagnosis UTI Nephrotic syndrome CRF Liver disorders Cardiac disease Malabsorption disorder
17 Differential Diagnosis Membrano-proliferative glomerulonephritis IgA nephropathy Systemic lupus erythematosis Henoch-schonlein purpura Hemolytic Uremic Syndrome Infective Endocarditis
18 Complication Hypertension Acute renal failure Heart failure Hyperkalemia Hyperphosphatemia Hypocalcemia Acidosis Seizures Uremia
19 Treatment General and Supportive Care Bed Rest Antibiotics (benzyl penicillin x 10 days) Dietary Restriction Treatment of Complications Renal failure Left Ventricular failure Hypertensive
20 ARF Protein restriction Fluid & electrolyte balance Acid base balance Control of infections Control of seizures Anemia
21 Heart Failure Prop up O2 inhalation Digitalization Diuretics ACE inhibitors
22 Hypertension Sublingual nifedipine ( mg/kg/dose) HTN crises Furosemide ( 1-2mg/kg/dose 4-6 hrly) Captopril (0.5-5mg/kg/day 8 hrly)
23 Prevention Early systemic antibiotic therapy dose not eliminate the risk Family members of patients with AGN should be cultured for group A beta hemolytic streptococcus and treated if culture positive
24 Prognosis Complete recovery in more than 95% cases Infrequently, the acute phase be severe and lead to glomerular hyalinization and chronic renal insufficiency Recurrences are extremely rare
25 Thank You
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