Acute proliferative glomerulonephritis(Redirected from Post-streptococcal glomerulonephritis)
Acute proliferative glomerulonephritis is a disorder of the glomeruli (glomerulonephritis), or small blood vessels in the kidneys. It is a common complication of bacterial infections, typically skin infection by Streptococcus bacteria types 12, 4 and 1 (impetigo) but also after streptococcal pharyngitis, for which it is also known as postinfectious or poststreptococcal glomerulonephritis. It can be a risk factor for future albuminuria. In adults, the signs and symptoms of infection may still be present at the time when the kidney problems develop, and the terms infection-related glomerulonephritis or bacterial infection-related glomerulonephritis are also used. Acute glomerulonephritis resulted in 19,000 deaths in 2013 down from 24,000 deaths in 1990 worldwide.
|Acute proliferative glomerulonephritis|
|Micrograph of a post-infectious glomerulonephritis. Kidney biopsy. PAS stain.|
|Causes||Caused by Streptococcus bacteria |
|Diagnostic method||Kidney biopsy, Complement profile|
|Treatment||Low-sodium diet, Blood pressure management|
|Frequency||1.5 million (2015)|
Signs and symptomsEdit
Among the signs and symptoms of acute proliferative glomerulonephritis are the following:
Acute proliferative glomerulonephritis (post-streptococcal glomerulonephritisis) is caused by an infection with streptococcus bacteria, usually three weeks after infection, usually of the pharynx or the skin, given the time required to raise antibodies and complement proteins. The infection causes blood vessels in the kidneys to develop inflammation, this hampers the renal organs ability to filter urine. Acute proliferative glomerulonephritis most commonly occurs in children.
The pathophysiology of this disorder is consistent with an immune-complex-mediated mechanism, a type III hypersensitivity reaction. This disorder produces proteins that have different antigenic determinants, which in turn have an affinity for sites in the glomerulus. As soon as binding occurs to the glomerulus, via interaction with properdin, the complement is activated. Complement fixation causes the generation of additional inflammatory mediators
Complement activation is very important in acute proliferative glomerulonephritis. Apparently immunoglobulin (Ig)-binding proteins bind C4BP. Complement regulatory proteins (FH and FHL-1), may be removed by SpeB, and therefore restrain FH and FHL-1 recruitment in the process of infection.
The following diagnostic methods can be used for acute proliferative glomerulonephritis:
Clinically, acute proliferative glomerulonephritis is diagnosed following a differential diagnosis between (and, ultimately, diagnosis of) staphylococcal and streptococcal impetigo. Serologically, diagnostic markers can be tested; specifically, the streptozyme test is used and measures multiple streptococcal antibodies: antistreptolysin, antihyaluronidase, antistreptokinase, antinicotinamide-adenine dinucleotidase, and anti-DNAse B antibodies.
The differential diagnosis of acute proliferative glomerulonephritisis is based on the following:[medical citation needed]
- Causes of acute glomerulonephritis:
- Nephrotic syndrome
- Causes of generalized edema:
It is unclear whether or not acute proliferative glomerulonephritis (i.e., poststreptococcal glomerulonephritis) can be prevented with early prophylactic antibiotic therapy, with some authorities arguing that antibiotics can prevent development of acute proliferative glomerulonephritis, while others reject that antibiotics can prevent acute proliferative glomerulonephritis.
Treatment of acute proliferative glomerulonephritis consists of blood pressure (BP) control and a renal biopsy may be needed at some point. A low-sodium diet may be needed when hypertension is present. In individuals with oliguric acute kidney injury, the amount of potassium should be controlled.
Acute glomerulonephritis resulted in 19,000 deaths in 2013 down from 24,000 deaths in 1990.
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