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Calderaro A, Piccolo G, Perandin F, Gorrini C, Peruzzi S, Zuelli C, Ricci L, Manca N, Dettori G, Chezzi C, Snounou G. Genetic polymorphisms influence Plasmodium ovale PCR detection accuracy. J Clin Microbiol 2007; 45:1624-7. [PMID: 17360843 PMCID: PMC1865880 DOI: 10.1128/jcm.02316-06] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Detection of Plasmodium ovale by use of a nested PCR assay with a novel Plasmodium ovale primer set was superior to detection of Plasmodium ovale by real-time PCR assays. Nested PCR was also better at detecting P. malariae. The detection of P. ovale in many patients first admitted >2 months following their return to Italy indicated that P. ovale relapses are common.
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Calderaro A, Piccolo G, Peruzzi S, Dettori G, Chezzi C. P1724 Performance evaluation of the Vidia™ toxoplasmosis IgG and IgM assays. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)71563-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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78
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Calderaro A, Villanacci V, Bommezzadri S, Gorrini C, Piccolo G, Aquilano MC, Incaprera M, Viviani G, Dettori G, Chezzi C. Colonic amoebiasis and spirochetosis: morphological, ultrastructural and microbiological evaluation. J Gastroenterol Hepatol 2007; 22:64-7. [PMID: 17201883 DOI: 10.1111/j.1440-1746.2006.04396.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND The present study reports on a prompt diagnosis of colonic amoebiasis with colonic spirochetosis by Brachyspira aalborgi and B. pilosicoli; such diagnosis allowed exclusion of other diseases and resolution of the case after specific treatment. METHODS AND RESULTS A 37-year-old Italian man with a history of several months' mucosal diarrhea travelled to Greece, Romania and Tunisia. After his last trip he presented with an increase of up to 3-5 discharges daily, associated with bloody diarrhea, supporting the clinical suspect of inflammatory bowel disease. Colonoscopy revealed erosions from the cecum to the rectum, and ulcers both in the descending and sigmoid colon. Structures resembling amoebic trophozoites and sinusoidal microorganisms were observed in the colonic biopsies at histopathology and electron microscopy. Entamoeba histolytica DNA was detected by small-subunit rDNA polymerase chain reaction (PCR) from feces, rectal biopsies and isolated trophozoites. Spirochetes were identified from feces, colonic biopsies and cultures using a 16S rDNA restriction fragment length polymorphism-PCR specific for the detection of B. aalborgi and B. pilosicoli. After therapy, the patient was restored to health. CONCLUSIONS The rapid identification of E. histolytica, B. aalborgi and B. pilosicoli using traditional and specific and sensitive molecular methods permitted an accurate diagnosis and a specific therapy. It is suggested that mixed infection by parasites and spirochetes might occur more frequently than expected: it would be of extreme interest and importance to intensify clinical findings, and one infection should not prompt the pathologist/clinician to stop looking.
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Bovera F, Piccolo G, Nizza S, Lucà R, Di Meo C. Use of ostrich faeces as alternative inoculum to caecal content to study the in vitrodigestibility of alfalfa (green, dehydrated and hay). ITALIAN JOURNAL OF ANIMAL SCIENCE 2007. [DOI: 10.4081/ijas.2007.1s.269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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80
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Piccolo G, Marono S, Badini E, Guglielmelli A, Morra F, Nizza A. Effect of stocking density and protein/fat ratio of the diet on growth of Dover sole ( Solea solea). ITALIAN JOURNAL OF ANIMAL SCIENCE 2007. [DOI: 10.4081/ijas.2007.1s.816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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81
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Peruzzi S, Gorrini C, Piccolo G, Calderaro A, Dettori G, Chezzi C. Prevalence of intestinal parasites in the area of Parma during the year 2005. ACTA BIO-MEDICA : ATENEI PARMENSIS 2006; 77:147-51. [PMID: 17312984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
BACKGROUND AND AIM OF THE WORK Intestinal parasitosis represent a relevant clinical problem, especially in developing countries, where they are responsible for morbidity and mortality in adults and children and many epidemiological data are available for these areas. The actual situation of intestinal parasitosis in Europe is not yet well investigated since they are usually not notified. We describe the occurrence of intestinal parasitosis in our laboratory from January to December 2005. METHODS We considered all patients (1117) whose stool samples were sent to our laboratory with the suspect of intestinal parasitosis during the year 2005. Each specimen was subjected to macroscopic and microscopic examination to demonstrate the presence of worm eggs, larvae, protozoan trophozoites or cysts and to an immunochromatographic assay to detect Giardia intestinalis and Cryptosporidium spp. specific antigens. Cultures for protozoa and helminths were carried out and a PCR specific for Entamoeba histolytica/Entamoeba dispar was also performed. RESULTS Our results indicated that 148 patients (13.24%) were affected by intestinal parasitosis. Among the 951 Italians, 96 (10%) were infected, while out of a total of 166 foreigners 52 had intestinal parasitosis (31%). Moreover, we found that 113 infections were caused by only one parasite while 35 were mixed infections. CONCLUSIONS Intestinal parasitosis represent a remarkable cause of gastrointestinal disease and our study demonstrates that these infections are quite common in our area, affecting both Italians and non European citizens from developing countries.
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Calderaro A, Bommezzadri S, Gorrini C, Piccolo G, Peruzzi S, Dettori G, Chezzi C. Comparative evaluation of molecular assays for the identification of intestinal spirochaetes from diseased pigs. Vet Microbiol 2006; 118:91-100. [PMID: 16879935 DOI: 10.1016/j.vetmic.2006.06.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2006] [Revised: 06/20/2006] [Accepted: 06/26/2006] [Indexed: 11/18/2022]
Abstract
Rapid identification of porcine Brachyspira species is required in order to differentiate pathogenic from non-pathogenic species. The aim of our study was to compare a recently described genetic method based on polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP), nox RFLP-PCR assay, and three species-specific PCRs described previously in the literature with a 16S rRNA gene RFLP-PCR discriminatory reference assay (16S RFLP-PCR) for the identification of Brachyspira spp. of swine origin. In this study, 20 porcine spirochaetal strains were identified and compared to 33 reference strains by 16S RFLP-PCR and nox RFLP-PCR and three species-specific PCRs. RFLP-PCR methods showed concordant results for 47 strains and discordances for 6 strains (2 differently identified and 4 not revealed by nox RFLP-PCR). In our hands species-specific PCRs showed concordant results with 16S and nox RFLP-PCR for 43 strains and discordances for 10 strains (2 differently identified and 8 not amplified). The same results observed testing the 20 field-isolated spirochaetes were obtained for the corresponding porcine faecal samples. The detection limit was 10(2) -10(3) cells/g of faeces for 16S rRNA gene PCR and 10(4) cells/g of faeces for nox PCR. In our experience nox RFLP-PCR appeared successful for the speciation of B. hyodysenteriae reserving 16S RFLP-PCR for all other pathogenic and non-pathogenic Brachyspira species. Among the species-specific PCR assays tested only that for B. pilosicoli was useful in our hands.
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Calderaro A, Piccolo G, Peruzzi S, Gorrini C, Bommezzadri S, Dettori G, Chezzi C. CONFRONTO TRA DUE SAGGI DI REAL-TIME PCR ED UNA NESTED PCR PER LA DIAGNOSIDI TO XOPLASMOSI. MICROBIOLOGIA MEDICA 2006. [DOI: 10.4081/mm.2006.3394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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84
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Calderaro A, Gorrini C, Piccolo G, Peruzzi S, Bommezzadri S, Dettori G, Chezzi C. LA BIOLOGIA MOLECOLARE NELLA DIAGNOSTICA PARASSITOLOGICA. MICROBIOLOGIA MEDICA 2006. [DOI: 10.4081/mm.2006.3114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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85
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Calderaro A, Piccolo G, Gorrini C, Peruzzi S, Bommezzadri S, Dettori G, Chezzi C. EPIDEMIOLOGIA DELLA MALARIA A PARMA NEL PERIODO 2002-2006. MICROBIOLOGIA MEDICA 2006. [DOI: 10.4081/mm.2006.3190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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86
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Calderaro A, Gorrini C, Peruzzi S, Piccolo G, Bommezzadri S, Dettori G, Chezzi C. EPIDEMIOLOGIA DELLE PARASSITOSI INTESTINALI A PARMA NELL’ANNO 2005. MICROBIOLOGIA MEDICA 2006. [DOI: 10.4081/mm.2006.3200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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87
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Calderaro A, Gorrini C, Piccolo G, Peruzzi S, Bommezzadri S, Dettori G, Chezzi C. CASI DI AMEBIASI A PARMA NEL PERIODO 2003-2006. MICROBIOLOGIA MEDICA 2006. [DOI: 10.4081/mm.2006.3366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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88
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Calderaro A, Piccolo G, Perandin F, Gorrini C, Peruzzi S, Ricci L, Manca N, Snounou G, Dettori G, Chezzi C. MESSA A PUNTO DI UNA NESTED-PCR PER IDENTIFICARE CEPPI DI P.OVALE CON POLIMORFISMO GENETICO NEL 18S-rDNA. MICROBIOLOGIA MEDICA 2006. [DOI: 10.4081/mm.2006.3362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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89
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Beninati T, Piccolo G, Rizzoli A, Genchi C, Bandi C. Anaplasmataceae in wild rodents and roe deer from Trento Province (northern Italy). Eur J Clin Microbiol Infect Dis 2006; 25:677-8. [PMID: 17047904 DOI: 10.1007/s10096-006-0196-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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90
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Moniello G, Bovera F, Solinas IL, Piccolo G, Pinna W, Nizza A. Effect of age and blood collection site on the metabolic profile of ostriches (Short communication). S AFR J ANIM SCI 2006. [DOI: 10.4314/sajas.v35i4.3970] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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91
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Calderaro A, Piccolo G, Gorrini C, Peruzzi S, Zerbini L, Bommezzadri S, Dettori G, Chezzi C. Comparison between two real-time PCR assays and a nested-PCR for the detection of Toxoplasma gondii. ACTA BIO-MEDICA : ATENEI PARMENSIS 2006; 77:75-80. [PMID: 17172185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
BACKGROUND AND AIM OF THE WORK In recent years, the diagnosis of toxoplasmosis has been improved by Real-time PCR assays. In this study we compared the performances of two Real-time PCRs (FRET and TaqMan protocols) already described in the literature, and one nested-PCR, currently used in our laboratory for the molecular diagnosis of toxoplasmosis. METHODS We evaluated the sensitivity and the specificity of a FRET- and a TaqMan-based Real-time PCRs targeting a 529 bp repeat region and the 18S RNA gene, respectively, and a nested-PCR, targeting the B1-gene of Toxoplasma gondii. We also tested, through nested-PCR, 46 biological samples obtained during a period of 29 months from pregnant women or immunocompromised patients with suspected T. gondii infection. RESULTS The analytical sensitivity of nested and TaqMan PCRs was approximately 10(3) tachyzoites/ml. FRET assay showed a sensitivity of 102 tachyzoites/ml. Three out of 46 biological samples were nested-PCR-positive and these results were also confirmed by both Real-time PCRs. CONCLUSIONS Nested- and real-time PCRs evaluated in this study resulted very sensitive and specific; in particular FRET PCR resulted more sensitive than the other assays, probably because of the greater copy number of the target sequence. Real-time PCR assays are easy-to-use, producing results faster than conventional PCR systems and reducing contamination risks.
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Cotticelli L, Borrelli M, D'Alessio AC, Menzione M, Villani A, Piccolo G, Montella F, Iovene MR, Romano M. Central serous chorioretinopathy and Helicobacter pylori. Eur J Ophthalmol 2006; 16:274-8. [PMID: 16703546 DOI: 10.1177/112067210601600213] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
PURPOSE This study was designed to evaluate the prevalence of Helicobacter pylori infection in patients with central serous chorioretinopathy (CSC). METHODS Retrospective observational case series. A group of 23 patients (22 men and 1 woman, age range 34-62 years, median age 47 years) with diagnosis of CSC, confirmed by fluorescein angiogram, and a control group of 23 consecutive patients (22 men and 1 woman, age range 41-69 years, median age 50 years) referred to our Department for retinal disease other than CSC were studied. Each patient provided peripheral venous blood samples and a stool specimen, which were analyzed at the Department of Gastroenterology and Microbiology at the same university. H. pylori infection was determined by measurement of IgG anti-bodies to H. pylori and by determination of H. pylori antigens in the stool specimens by enzyme-linked immunosorbent assay technique. Patients were defined as H. pylori infected if both tests were positive. RESULTS The prevalence of H. pylori infection was 78.2% (95% CI, 56%-92%) in CSC patients and 43.5% (95% CI, 23%-65%) in control subjects (p<0.03 by two-tail ed Fisher exact test). The odds ratio for CSC associated with H. pylori infection was 4.6 (95% CI 1.28-16.9). CONCLUSIONS The results of this study show that the prevalence of H. pylori infection seems to be significantly higher in patients with CSC than in control s. H. pylori infection may represent a risk factor in patients with CSC.
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Calderaro A, Gorrini C, Bommezzadri S, Piccolo G, Dettori G, Chezzi C. Entamoeba histolytica and Entamoeba dispar: comparison of two PCR assays for diagnosis in a non-endemic setting. Trans R Soc Trop Med Hyg 2005; 100:450-7. [PMID: 16274714 DOI: 10.1016/j.trstmh.2005.07.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2005] [Revised: 07/28/2005] [Accepted: 07/28/2005] [Indexed: 10/25/2022] Open
Abstract
Detection of Entamoeba histolytica, the causative agent of amoebiasis, is an important goal of the clinical parasitology laboratory. The identification of Entamoeba dispar as a morphologically identical but non-pathogenic species has highlighted the need for non-microscopic detection methods able to differentiate between the two organisms. In this study we evaluated the utility of conventional PCR and real-time PCR as methods for identification and differentiation of E. histolytica and E. dispar. The second aim of this study was to determine the relative proportions of infections caused by E. histolytica and the non-pathogenic E. dispar, allowing a picture of the epidemiological situation in a non-endemic setting to be obtained. One hundred and sixty-six clinical samples (faecal and liver abscess samples and one intestinal biopsy) belonging to 108 patients were analysed. More patients with E. dispar infection (8.3%) than patients with E. histolytica infection (5.6%) were found by both PCR assays. It is concluded that routine diagnosis of invasive amoebiasis performed by a combination of microscopy, culture and serology should be complemented with a PCR assay such as real-time PCR that offers a practical and clinically acceptable alternative for rapid and accurate diagnosis of amoebic infection in patients presenting with symptoms indicative of this disease.
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Baccarani U, Sanna A, Cariani A, Sainz M, Adani GL, Lorenzin D, Montanaro D, Scalamogna M, Piccolo G, Risaliti A, Bresadola F, Donini A. Cryopreserved human hepatocytes from cell bank: in vitro function and clinical application. Transplant Proc 2005; 37:256-9. [PMID: 15808612 DOI: 10.1016/j.transproceed.2004.12.230] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
UNLABELLED We Aimed to analyze the in vitro function of isolated and cryopreserved human hepatocytes (CHH) from a cell bank and to define their potential clinical application in a bioartificial liver (BAL) device. METHODS Over 24 months, 103 not transplantable livers were utilized for human hepatocytes isolation and cryopreservation. Hepatocytes isolated by collagenase were analyzed for yield, viability, diazepam metabolism, and production of human albumin after isolation and cryopreservation in LN(2). RESULTS The causes for refusal for transplantation were macrosteatosis >60%, ischemic damage due to donor hypotension, and nonviral cirrhosis in 60%, 11%, and 8%, respectively. Cell yields averaged 7 million hepatocytes per gram of liver of mean viability of 80% +/- 13%. The viability of CHH after thawing averaged 50%. Thawed hepatocytes showed diazepam metabolism, and human albumin synthesis comparable to fresh cells. CHH were utilized as the biological component of a BAL for temporary support as three applications of two patients affected by fulminant hepatic failure awaiting urgent transplant. Ten to 13 billion viable CHH were loaded into each BAL. Liver function showed bilirubin and ammonia reduction at the end of each treatment. One patient was successfully bridged to emergency OLTx after one BAL; in the second case there was spontaneous recovery of liver function after two BAL. CONCLUSIONS Recovery of donor human livers unwanted for transplantation allowed isolation and cryopreservation of viable and functionally active human hepatocytes, which have been banked and successfully used for clinical applications of a BAL device.
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Marchioni E, Ravaglia S, Piccolo G, Furione M, Zardini E, Franciotta D, Alfonsi E, Minoli L, Romani A, Todeschini A, Uggetti C, Tavazzi E, Ceroni M. Postinfectious inflammatory disorders: Subgroups based on prospective follow-up. Neurology 2005; 65:1057-65. [PMID: 16217059 DOI: 10.1212/01.wnl.0000179302.93960.ad] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Acute disseminated encephalomyelitis (ADEM) refers to a monophasic acute multifocal inflammatory CNS disease. However, both relapsing and site-restricted variants, possibly associated with peripheral nervous system (PNS) involvement, are also observed, and a systematic classification is lacking. OBJECTIVE To describe a cohort of postinfectious ADEM patients, to propose a classification based on clinical and instrumental features, and to identify subgroups of patients with different prognostic factors. METHODS Inpatients of a Neurologic and Infectious Disease Clinic affected by postinfectious CNS syndrome consecutively admitted over 5 years were studied. RESULTS Of 75 patients enrolled, 60 fulfilled criteria for ADEM after follow-up lasting from 24 months to 7 years. Based on lesion distribution, patients were classified as encephalitis (20%), myelitis (23.3%), encephalomyelitis (13.3%), encephalomyeloradiculoneuritis (26.7%), and myeloradiculoneuritis (16.7%). Thirty patients (50%) had a favorable outcome. Fifteen patients (25%) showed a relapsing course. Poor outcome was related with older age at onset, female gender, elevated CSF proteins, and spinal cord and PNS involvement. All but two patients received high-dose steroids as first-line treatment, with a positive response in 39 (67%). Ten of 19 nonresponders (53%) benefited from high-dose IV immunoglobulin; 9 of 10 had PNS involvement. The data were not controlled. CONCLUSIONS A high prevalence of "atypical variants" was found in this series, with site-restricted damage or additional peripheral nervous system (PNS) involvement. Prognosis and response to steroids were generally good, except for some patient subgroups. In patients with PNS involvement and steroid failure, a favorable effect of IV immunoglobulin was observed.
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Calderaro A, Piccolo G, Perandin F, Ricci L, Manca N, Dettori G, Chezzi C. RIVELAZIONE DI P.OVALE E P. MALARIAE MEDIANTE UN NUOVO SAGGIO DI REAL-TIME PCR. MICROBIOLOGIA MEDICA 2005. [DOI: 10.4081/mm.2005.3653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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97
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Calderaro A, Gorrini C, Bommezzadri S, Piccolo G, Dettori G, Chezzi C. CONFRONTO TRA DUE SAGGI DI PCR PER LA DIAGNOSI DI LABORATORIO DI AMEBIASI. MICROBIOLOGIA MEDICA 2005. [DOI: 10.4081/mm.2005.3638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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98
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Calderaro A, Bommezzadri S, Gorrini C, Piccolo G, Peruzzi S, Villanacci V, Dettori G, Chezzi C. SPIROCHETOSI INTESTINALE: INFEZIONE EMERGENTE? TRE ANNI DI INDAGINI A PARMA. MICROBIOLOGIA MEDICA 2005. [DOI: 10.4081/mm.2005.3454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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99
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Calderaro A, Piccolo G, Zuelli C, Bommezzadri S, Perandin F, Ricci L, Manca N, Dettori G, Chezzi C. CASI DI MALARIA DA P.OVALE A PARMA: DATI DEGLI ULTIMI 5 ANNI. MICROBIOLOGIA MEDICA 2005. [DOI: 10.4081/mm.2005.3681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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100
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Ferreira DM, Zângaro RA, Villaverde AB, Cury Y, Frigo L, Picolo G, Piccolo G, Longo I, Barbosa DG. Analgesic Effect of He-Ne (632.8 nm) Low-Level Laser Therapy on Acute Inflammatory Pain. Photomed Laser Surg 2005; 23:177-81. [PMID: 15910182 DOI: 10.1089/pho.2005.23.177] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE The aim of this study was to evaluate the analgesic effect of the low level laser therapy (LLLT) with a He-Ne laser on acute inflammatory pain, verifying the contribution of the peripheral opioid receptors and the action of LLLT on the hyperalgesia produced by the release of hyperalgesic mediators of inflammation. BACKGROUND DATA All analgesic drugs have undesired effects. Because of that, other therapies are being investigated for treatment of the inflammatory pain. Among those, LLLT seems to be very promising. MATERIAL AND METHODS Male Wistar rats were used. Three complementary experiments were done. (1) The inflammatory reaction was induced by the injection of carrageenin into one of the hind paws. Pain threshold and volume increase of the edema were measured by a pressure gauge and plethysmography, respectively. (2) The involvement of peripheral opioid receptors on the analgesic effect of the laser was evaluated by simultaneous injection of carrageenin and naloxone into one hind paw. (3) Hyperalgesia was induced by injecting PGE2 for the study of the effect of the laser on the sensitization increase of nociceptors. A He-Ne laser (632.8 nm) of 2.5 J/cm2 was used for irradiation. RESULTS We found that He-Ne stimulation increased the pain threshold by a factor between 68% and 95% depending on the injected drug. We also observed a 54% reduction on the volume increase of the edema when it was irradiated. CONCLUSION He-Ne LLLT inhibits the sensitization increase of nociceptors on the inflammatory process. The analgesic effect seems to involve hyperalgesic mediators instead of peripheral opioid receptors.
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