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Query: UMLS:C0034186 (pyelonephritis)
 6,144 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The following indices were studied in 21 patients with chronic pyelonephritis: T-lymphocytes - early and late, their TG and TM subpopulations; B-lymphocytes: complement-receptor, antibody (hemolysin) synthesizing, carring surface immunoglobulins (sIg+) and cytoplasmatic immunoglobulins (cIg+); immunoblasts in peripheral blood; serum level of immunoglobulins and of C3 - fraction of complement. The authors established a tendency to increase of early T-lymphocytes and their TG - subpopulations in the patients. TM - subpopulations were considerably lower, as compared with those of the healthy subjects. The complement - receptor and immunoglobulin-containing B cella in the patients with chronic pyelonephritis were increased as compared with the same in healthy subjects. Only IgM level in serum of the patients studied was higher than in the healthy subjects from the humoral factors of immune reactivity. Chronic pyelonephritis, was concluded, by the authors, to participate in the cellular-humoral immune mechanisms with a predominating activation of B-populations and IgM synthesis.
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PMID:[Cellular and humoral immunological characteristics of chronic pyelonephritis]. 660 68

Chronic pyelonephritis was induced in young adult cats by the intravenous injection of a human or a feline strain of Escherichia coli after ligation of one ureter for 24 or 48 h. In the 3 cats infected with the feline strain, scarred kidneys from the obstructed side were removed at necropsy 3, 4 and 5 months later. Collagen was extracted from pyelonephritic and normal kidney tissue with dilute acetic acid and limited proteolysis with pepsin. Scarred kidneys gave higher yields of both acid-soluble collagen (normal = 0.57 +/- 0.12 mg per g tissue; scarred = 0.88 +/- 0.10 mg per g tissue) and pepsin-solubilized collagen (normal = 9.69 +/- 1.79 mg per g tissue; scarred = 20.02 +/- 2.84 mg per g tissue). There was no significant increase in the collagen yield from the kidneys of the 2 cats in which mild focal lesions were found 14 and 16 months after infection with the human strain of E. coli. Pepsin released collagens were separated by fractional salt precipitation and identified by agarose gel chromatography and polyacrylamide gel electrophoresis. Normal kidney was shown to contain collagen of Types I, IV and V (AB). The Type IV collagen extracted consisted of a mixture of 4 major pepsin-resistant chains of apparent molecular weights of 150 000, 115 000, 85 000 and 60 000. The collagen extracted from scarred kidneys was predominantly Type I, only trace amounts of Type IV and V components being present. These findings suggest that basement membrane collagens of the kidney are selectively degraded during the atrophy and scarring of chronic feline pyelonephritis and are preferentially replaced by interstitial Type I collagen.
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PMID:Experimental pyelonephritis in the cat: 3. Collagen alterations in renal fibrosis. 684 96

The paper presents 24 cases of pregnancy and labor in women with kidney aplasia complicated by reproductive system anomalies and affections of the solitary kidney (pyelonephritis, hydronephrosis). Pregnancy contraindications for such patients are determined. Pregnancy outcome prognosis was favorable in intact renal function and absence of infection. Chronic pyelonephritis and renal insufficiency worsen the prognosis.
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PMID:[Pregnancy in women with kidney aplasia]. 947 93

Case records of patients aged 13 years or below with chronic renal failure (CRF), seen during the last 10 years at the King Hussein Medical Center, Amman, Jordan were reviewed. There were 46 patients with CRF, (25 males and 21 females), aged 1/2 to 13 years. Chronic pyelonephritis was the major cause of CRF seen in 23 cases (50%), followed by glomerulonephritis in eight (17.4%), congenital hypodysplasia in six (13%), hereditary nephritis in five (10.9%) and unknown etiology in four (8.7%). Of the study patients, 17.3% were below the age of five years at first presentation. Twenty one patients progressed to end-stage renal disease and among them chronic glomerulonephritis was the most common primary renal disease. The higher incidence of chronic pyelonephritis causing CRF in our series in comparison to 23.9% incidence reported in the developed countries shows that our infants and young children probably are not investigated early enough nor do they receive adequate treatment at the time of their first urinary tract infection. Prevention of renal failure, availability of replacement therapy, and extension of treatment opportunities to more children are the main problems concerning CRF in children in our country.
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PMID:Causes of chronic renal failure in children in a single hospital in jordan: a 10 years retrospective study. 1858 37

The paper briefly summarizes issues related to urinary tract infections in adults: predispositions and risk factors, classification, assessment of pathogenicity of bacterial agents, the role of bacteriuria and leucocyturia, interpretation of findings, treatment principles and an association with chronic renal failure. Urinary tract infections are the second most frequent infectious disease in the population. They most often affect women of childbearing potential and then seniors of both sexes who have multiple risk factors. Escherichia coli and Staphylococcus saprophyticus are the most pathogenic towards urinary tract; they are responsible for 85% and 10-15% of cases of acute uncomplicated urinary infections, respectively. Chronic pyelonephritis, a chronic interstitial nephritis, is the fourth most frequent cause of chronic renal failure. Chronic renal failure is a risk factor for the development of urinary infections due to metabolic disorders resulting in secondary immunodeficiencywith a disorder of all components of immunity. In patients with chronic renal failure, urinary tract infections occur most frequently after kidney transplantation when graft pyelonephritis is a life-threatening complication. Therefore, urinary tract infection prevention with co-trimoxazole once daily over at least 6 months is recommended in renal allograft recipients.
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PMID:[Urinary tract infections and chronic renal failure]. 2187 96

Contrast-enhanced CT is not routinely indicated in uncomplicated urinary infections, but it may be necessary in patients with specific risk factors (i.e., diabetes, immunocompromised patients, history of stones, or prior renal surgery) or in patients not responding to antibiotics and in detecting complications of pyelonephritis. CT is the gold standard for imaging assessment of pyelonephritis severity. Imaging appearance of acute pyelonephritis, including focal (i.e., wedge-shaped zones of decreased attenuation or hypodense mass) and diffuse (i.e., global enlargement, poor parenchymal enhancement, lack of excretion of contrast, fat stranding) forms, needs to be differentiated from renal infarction, renal lymphoma, and interstitial nephritis. Chronic pyelonephritis-which appears as focal polar scars with underlying calyceal distortion, global atrophy, and hypertrophy of residual tissue-may mimic at imaging lobar infarcts. This pictorial essay reviews the CT imaging appearance of acute and chronic pyelonephritis, their uncommon subtypes, and their complications, with key features for early diagnosis. Their knowledge is crucial for emergency and abdominal radiologists to avoid misdiagnosis with malignancy and to guide the clinician towards the appropriate medical or surgical treatment.
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PMID:CT imaging of acute and chronic pyelonephritis: a practical guide for emergency radiologists. 3244 22

Acute pyelonephritis is a bacterial infection of the renal parenchyma and collecting system. Diagnosis is based on clinical findings of fever, flank pain, and urinary tract infection. Computed tomography findings include renal enlargement with wedge-shaped heterogeneous areas of decreased enhancement, known as a "striated nephrogram." Imaging is primarily used to diagnose complications such as emphysematous pyelonephritis, renal abscess, and pyonephrosis. Chronic pyelonephritis can have varying appearances on imaging ranging from xanthogranulomatous pyelonephritis or, in extreme cases, renal replacement lipomatosis.
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PMID:Imaging of Renal Infections and Inflammatory Disease. 3279 23


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