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1.
Environ Sci Technol ; 48(22): 13331-9, 2014 Nov 18.
Artigo em Inglês | MEDLINE | ID: mdl-25299176

RESUMO

Cleaning agents often emit terpenes that react rapidly with ozone. These ozone-initiated reactions, which occur in the gas-phase and on surfaces, produce a host of gaseous and particulate oxygenated compounds with possible adverse health effects in the eyes and airways. Within the European Union (EU) project OFFICAIR, common ozone-initiated reaction products were measured before and after the replacement of the regular floor cleaning agent with a preselected low emitting floor cleaning agent in four offices located in four EU countries. One reference office in a fifth country did not use any floor cleaning agent. Limonene, α-pinene, 3-carene, dihydromyrcenol, geraniol, linalool, and α-terpineol were targeted for measurement together with the common terpene oxidation products formaldehyde, 4-acetyl-1-methylcyclohexene (4-AMCH), 3-isopropenyl-6-oxo-heptanal (IPOH), 6-methyl-5-heptene-2-one, (6-MHO), 4-oxopentanal (4-OPA), and dihydrocarvone (DHC). Two-hour air samples on Tenax TA and DNPH cartridges were taken in the morning, noon, and in the afternoon and analyzed by thermal desorption combined with gas chromatography/mass spectrometry and HPLC/UV analysis, respectively. Ozone was measured in all sites. All the regular cleaning agents emitted terpenes, mainly limonene and linalool. After the replacement of the cleaning agent, substantially lower concentrations of limonene and formaldehyde were observed. Some of the oxidation product concentrations, in particular that of 4-OPA, were also reduced in line with limonene. Maximum 2 h averaged concentrations of formaldehyde, 4-AMCH, 6-MHO, and IPOH would not give rise to acute eye irritation-related symptoms in office workers; similarly, 6-AMCH, DHC and 4-OPA would not result in airflow limitation to the airways.


Assuntos
Poluição do Ar em Ambientes Fechados/análise , Pisos e Cobertura de Pisos , Ozônio/química , Terpenos/química , Local de Trabalho , Poluentes Atmosféricos/análise , Europa (Continente) , Oxirredução , Compostos Orgânicos Voláteis/análise
2.
Oncogene ; 26(44): 6372-85, 2007 Sep 27.
Artigo em Inglês | MEDLINE | ID: mdl-17533378

RESUMO

Indirubin-3'-monoxime is a derivative of the bis-indole alkaloid indirubin, an active ingredient of a traditional Chinese medical preparation that exhibits anti-inflammatory and anti-leukemic activities. Indirubin-3'-monoxime is mainly recognized as an inhibitor of cyclin-dependent kinases (CDKs) and glycogen synthase kinase-3. It inhibits proliferation of cultured cells, mainly through arresting the cells in the G1/S or G2/M phase of the cell cycle. Here, we report that indirubin-3'-monoxime is able to inhibit proliferation of NIH/3T3 cells by specifically inhibiting autophosphorylation of fibroblast growth factor receptor 1 (FGFR1), blocking in this way the receptor-mediated cell signaling. Indirubin-3'-monoxime inhibits the activity of FGFR1 at a concentration lower than that required for inhibition of phosphorylation of CDK2 and retinoblastoma protein and cell proliferation stimulated by fetal calf serum. The ability of indirubin-3'-monoxime to inhibit FGFR1 signaling was similar to that of the FGFR1 inhibitor SU5402. In addition, we found that indirubin-3'-monoxime activates long-term p38 mitogen-activated protein kinase activity, which stimulates extracellular signal-regulated kinase 1/2 in a way unrelated to the activity of FGFR1. Furthermore, we show that indirubin-3'-monoxime can inhibit proliferation of the myeloid leukemia cell line KG-1a through inhibition of the activity of the FGFR1 tyrosine kinase. The data presented here demonstrate previously unknown activities of indirubin-3'-monoxime that may have clinical implications.


Assuntos
Indóis/farmacologia , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Proteína Quinase 3 Ativada por Mitógeno/metabolismo , Oximas/farmacologia , Receptor Tipo 1 de Fator de Crescimento de Fibroblastos/metabolismo , Proteínas Quinases p38 Ativadas por Mitógeno/metabolismo , Animais , Ciclo Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Quinase 2 Dependente de Ciclina/metabolismo , Endocitose , Receptores ErbB/metabolismo , Fator 1 de Crescimento de Fibroblastos/metabolismo , Humanos , Células K562/efeitos dos fármacos , Células K562/metabolismo , Leucemia Mieloide/tratamento farmacológico , Leucemia Mieloide/metabolismo , Leucemia Mieloide/patologia , Camundongos , Células NIH 3T3/efeitos dos fármacos , Células NIH 3T3/metabolismo , Fosforilação , Proteína do Retinoblastoma/metabolismo , Transdução de Sinais/efeitos dos fármacos
3.
J Chromatogr A ; 1210(2): 203-11, 2008 Nov 14.
Artigo em Inglês | MEDLINE | ID: mdl-18922536

RESUMO

The emission of odor active volatile organic compounds (VOCs) from a floor oil based on linseed oil, the linseed oil itself and a low-odor linseed oil was investigated by thermal desorption gas chromatography combined with olfactometry and mass spectrometry (TD-GC-O/MS). The oils were applied to filters and conditioned in the micro emission cell, FLEC, for 1-3days at ambient temperature, an air exchange rate of 26.9h(-1) and a 30% relative humidity. These conditions resulted in dynamic headspace concentrations and composition of the odor active VOCs that may be similar to real indoor setting. Emission samples for TD-GC-O/MS analysis from the FLEC were on Tenax TA. Although many volatile VOCs were detected by MS, only the odor active VOCs are reported here. In total, 142 odor active VOCs were detected in the emissions from the oils. About 50 of the odor active VOCs were identified or tentatively identified by GC-MS. While 92 VOCs were detected from the oil used in the floor oil, only 13 were detected in the low-odor linseed oil. The major odor active VOCs were aldehydes and carboxylic acids. Spearmen rank correlation of the GC-O profiles showed that the odor profile of the linseed oil likely influenced the odor profile of the floor oil based on this linseed oil.


Assuntos
Cromatografia Gasosa-Espectrometria de Massas/métodos , Óleo de Semente do Linho/química , Odorantes/análise , Aldeídos/análise , Ácidos Carboxílicos/análise , Materiais de Construção , Pisos e Cobertura de Pisos , Cromatografia Gasosa-Espectrometria de Massas/instrumentação , Sensibilidade e Especificidade
4.
Circulation ; 102(3): 319-25, 2000 Jul 18.
Artigo em Inglês | MEDLINE | ID: mdl-10899096

RESUMO

BACKGROUND-The increased plasma disappearance of albumin has previously been described in decompensated congestive heart failure (CHF); this disappearance normalized after diuretic treatment. Cardiac transplantation (HTX) and current medical treatment affect microvascular structure and function. We investigated the plasma disappearance of albumin and the impact of microvascular thickness and electrostatic properties in patients with compensated CHF and after HTX. METHODS AND RESULTS-The fraction of intravascular albumin that passes to the extravascular space per unit time, as determined from the plasma disappearance of intravenously injected (131)I-labeled albumin, was increased to 7.8+/-1.7% in 16 patients with CHF compared with 18 controls (6.5+/-1.9%, P<0.05); these levels normalized after HTX (5.8+/-2.6%, P<0.01, n=17). The change in ratio between (131)I-albumin and simultaneously injected negatively charged glycosylated (125)I-albumin (selectivity index, >1/hour in controls) was lower in patients with HTX (0.993+/-0. 022/hour) than in controls (1.008+/-0.019/hour; P<0.05), which indicated a relatively increased plasma disappearance of negatively charged albumin in HTX patients. Capillary basement membrane thickness was evaluated semiquantitatively from skin biopsies and showed no difference in the 3 groups (control, CHF, and HTX patients). However, in all 3 study groups, subjects with thicker capillary basement membranes had lower albumin escape rates (6.1+/-1. 8%, n=32, versus 7.6+/-2.6% in subjects without thickening of capillary basement membranes, n=19; P<0.05). CONCLUSIONS-The plasma disappearance of albumin increased in patients with compensated CHF and it normalized after HTX. The present normalized capillary basement thicknesses in patients with CHF and the direct association between this parameter and plasma albumin disappearance indicate that previous compensatory microvascular basement membrane growth results in restricted permeability. Microvascular electrostatic properties did not relate to plasma albumin disappearance.


Assuntos
Capilares/patologia , Cardiomiopatia Dilatada/sangue , Cardiomiopatia Dilatada/cirurgia , Transplante de Coração , Albumina Sérica/análise , Adulto , Membrana Basal/patologia , Transporte Biológico , Capilares/fisiopatologia , Permeabilidade Capilar , Cardiomiopatia Dilatada/patologia , Cardiomiopatia Dilatada/fisiopatologia , Insuficiência Cardíaca/sangue , Insuficiência Cardíaca/fisiopatologia , Insuficiência Cardíaca/cirurgia , Humanos , Pessoa de Meia-Idade , Período Pós-Operatório , Albumina Sérica/farmacocinética
5.
Curr Top Microbiol Immunol ; 286: 45-79, 2004.
Artigo em Inglês | MEDLINE | ID: mdl-15645710

RESUMO

The fibroblast growth factor (FGF) family contains 23 members in mammals including its prototype members FGF-1 and FGF-2. FGFs have been implicated in regulation of many key cellular responses involved in developmental and physiological processes. These includes proliferation, differentiation, migration, apoptosis, angiogenesis, and wound healing. FGFs bind to five related, specific cell surface receptors (FGFRs). Four of these have intrinsic tyrosine kinase activity. Dimerization of the receptor is a prerequisite for receptor transphosphorylation and activation of downstream signaling molecules. All members of the FGF family have a high affinity for heparin and for cell surface heparan sulfate proteoglycans, which participate in formation of stable and active FGF-FGFR complexes. FGF-mediated signaling is an evolutionarily conserved signaling module operative in invertebrates and vertebrates. It seems that some members of the family have a dual mode of action. FGF-1, FGF-2, FGF-3, and FGF-11-14 have been found intranuclearly as endogenous proteins. Exogenous FGF-1 and FGF-2 are internalized by receptor-mediated endocytosis, in a clathrin-dependent and -independent way. Internalized FGF-1 and FGF-2 are able to cross cellular membranes to reach the cytosol and the nuclear compartment. The role of FGF internalization and the intracellular activity of some FGFs are discussed in the context of the known signaling induced by FGF.


Assuntos
Endocitose/fisiologia , Fatores de Crescimento de Fibroblastos/metabolismo , Transdução de Sinais , Animais , Proteoglicanas de Heparan Sulfato/metabolismo , Humanos , Espaço Intracelular/metabolismo , Ligação Proteica , Receptores Proteína Tirosina Quinases/metabolismo , Receptores de Superfície Celular/metabolismo , Receptores de Fatores de Crescimento de Fibroblastos/metabolismo , Sialoglicoproteínas/metabolismo
6.
Res Vet Sci ; 79(2): 93-8, 2005 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-15885725

RESUMO

The course of naturally acquired Lawsonia intracellularis infection was studied in 41 pigs by testing blood and faeces samples collected four to seven times from before weaning to slaughter 5 months old. At slaughter, a sample of ileum was taken for histopathology. In the first sampling when the pigs were 2-4 weeks old maternally derived IgG against L. intracellularis was demonstrated by immunofluorescence antibody test in nine pigs whereas the bacterium was detected by PCR in faeces from six pigs. The maternally derived antibodies did not prevent pigs from becoming infected as seven pigs later on shed and/or were seropositive for L. intracellularis. The lowest prevalence of L. intracellularis was observed in 6-13 weeks old pigs and it seemed as though L. intracellularis in early infected pigs only activates a minor antibody response. At slaughter 66% of the pigs were found positive by immunofluorescence antibody test compared to 24% by immunohistochemistry on ileal samples. Thus, applied at the time of slaughter the antibody test appeared to be a highly sensitive ante-mortem diagnostic tool for identifying L. intracellularis exposed pigs with or without current proliferative enteropathy.


Assuntos
Infecções por Desulfovibrionaceae/veterinária , Fezes/microbiologia , Lawsonia (Bactéria)/isolamento & purificação , Doenças dos Suínos/microbiologia , Envelhecimento , Animais , Infecções por Desulfovibrionaceae/sangue , Infecções por Desulfovibrionaceae/microbiologia , Técnica Indireta de Fluorescência para Anticorpo/veterinária , Íleo/microbiologia , Enteropatias/microbiologia , Enteropatias/veterinária , Reação em Cadeia da Polimerase , Sensibilidade e Especificidade , Suínos
7.
Am J Cardiol ; 84(11): 1328-34, 1999 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-10614799

RESUMO

Abnormal reflex control of the peripheral microvasculature during orthostasis in congestive heart failure (CHF) and after heart transplantation (HT) may cause failure of microvascular homeostasis and peripheral edema. We explored the effect of passive head-up tilt on lower leg capillary filtration measured by strain-gauge plethysmography in 24 patients with CHF, in 20 patients after HT (12 patients with preserved native right atrium, 8 patients without native right atrium), and in 18 controls. We hypothesized that an impaired peripheral microvascular reflex during orthostasis in CHF and HT might allow increased arterial hydrostatic pressure to increase pressure at the capillary level. To identify an impact of changes in arterial hydrostatic pressure, capillary fluid filtration was expressed per mm Hg arterial hydrostatic pressure (capillary filtration coefficient(arterial pressure) [CFC(AP)]) and was measured (1) during elevated venous pressure alone (50 mm Hg venous stasis in supine position), and (2) during elevated hydrostatic pressure at both the venous and arterial side of the vascular tree (head-up tilt with a vertical distance from the right atrium to the strain-gauge of 68 cm of water [50 mmHg]). Elevated venous pressure alone resulted in the highest CFC(AP) in controls (0.79+/-0.28 ml/min x 100 ml mm Hg x 10(-3)+/-SD) versus those with CHF (0.44+/-0.23, p <0.0001) and those after HT (0.54+/-0.22, p <0.01). However, during head-up tilt, CFC(AP) was similar in all 3 groups, because CFC(AP) decreased in controls (to 0.49+/-0.22, p <0.0001), in contrast to unchanged CFC(AP) in those with CHF (0.43+/-0.24) and in those with HT (0.50+/-0.21). HT patients with complete removal of the native right atrium had higher CFC(AP) (0.62+/-0.17) during head-up tilt than patients with preserved native right atrium (0.36+/-0.16, p <0.005). In conclusion, patients with CHF and those after HT have increased capillary filtration to a lesser degree than controls during elevated venous pressure alone. However, during orthostasis this apparent edema-protective mechanism vanishes, probably because of compromised microvascular reflex control. During daily upright activities, this may be one important factor in the edema pathogenesis. The phenomenon is particularly distinct in HT patients without preserved native right atrium.


Assuntos
Capilares/fisiopatologia , Cardiomiopatia Dilatada/fisiopatologia , Transplante de Coração , Perna (Membro)/irrigação sanguínea , Postura/fisiologia , Teste da Mesa Inclinada , Adulto , Pressão Sanguínea , Cardiomiopatia Dilatada/cirurgia , Edema/fisiopatologia , Feminino , Humanos , Pressão Hidrostática , Masculino , Microcirculação , Pessoa de Meia-Idade , Pletismografia , Prognóstico , Fatores de Tempo
8.
Drugs ; 35 Suppl 2: 100-5, 1988.
Artigo em Inglês | MEDLINE | ID: mdl-3396471

RESUMO

In this open, prospective, comparative study, 75 patients who sustained penetrating abdominal trauma were randomised to receive 1 of 3 antibiotic regimens preoperatively and for 3 to 5 days postoperatively. Group I received cefotaxime 2g 8-hourly, group II received cefoxitin 2g 6-hourly and group III received clindamycin (900 mg 8-hourly) and gentamicin 3 to 5 mg/kg/day in divided doses 8-hourly. The 3 groups were not statistically different in terms of age, sex, severity of injury, number of organs injured, colon injuries, shock, blood transfusions or positive intra-operative cultures. Septic complications occurred in 8% of patients in group I, in 4% of group II patients and in 8% of group III patients. Cefotaxime was the least costly regimen, followed by cefoxitin, then clindamycin and gentamicin. It may be concluded that single agent therapy with a broad spectrum cephalosporin is preferable to combination therapy on the basis of equivalent effectiveness, less toxicity and lower costs.


Assuntos
Traumatismos Abdominais/complicações , Infecções Bacterianas/prevenção & controle , Cefalosporinas/uso terapêutico , Clindamicina/uso terapêutico , Gentamicinas/uso terapêutico , Ferimentos Penetrantes/complicações , Infecções Bacterianas/etiologia , Cefotaxima/uso terapêutico , Cefoxitina/uso terapêutico , Custos e Análise de Custo , Quimioterapia Combinada , Humanos , Estudos Prospectivos , Distribuição Aleatória
9.
Surgery ; 106(3): 496-501, 1989 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-2772824

RESUMO

A retrospective review of 229 patients with a final diagnosis of small-bowel obstruction was undertaken to evaluate the role of contrast radiography in the management of their conditions. In 84 patients (37%) the clinical findings and plain abdominal roentgenograms were sufficient for diagnosis and subsequent management. Of the remaining 145 patients with equivocal findings, 27% had an upper gastrointestinal series, 29% a barium enema, and 44% had both. Useful information (complete obstruction, unobstructed passage of contrast, or diagnosis other than adhesional obstruction) was obtained from 86% of the radiographic studies. Three patients had negative contrast studies yet eventually underwent adhesiolysis (enterolysis) and were classified as false-negative. Two patients had evidence of high-grade obstruction yet had nonoperative resolution and were classified as false-positive. The mortality in the contrast group (7%) was not statistically different than that in the no-contrast group (7%). Contrast radiography is a safe and effective means of increasing diagnostic accuracy in patients with presumed small-bowel obstruction.


Assuntos
Obstrução Intestinal/diagnóstico por imagem , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Sulfato de Bário/efeitos adversos , Criança , Meios de Contraste/efeitos adversos , Enema , Feminino , Humanos , Obstrução Intestinal/cirurgia , Masculino , Pessoa de Meia-Idade , Radiografia
10.
Surgery ; 110(4): 742-51; discussion 751-2, 1991 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-1925963

RESUMO

The most effective means to prepare the hepatic donor liver for harvest, preservation, and transplantation are not known. Studies have shown that in combination with an injury to the liver, fasting reduces hepatic function. This study randomized 20 market pigs, 20 to 45 kg, to an overnight fast (fed group) or a 42-hour fast (fasted group). Under general anesthetic perfusion of the portal vein and hepatic artery were controlled. Studies were performed at high flow (30 ml/min/kg portal flow and 10 ml/min/kg arterial flow) and after a 90-minute period of warm ischemia (no flow). Flow was restored at 25% of the original (low flow), then increased to 50% of the original (medium flow). After the ischemic insult, the fed group improved hepatic oxygen consumption at a faster rate than the fasted group (p less than 0.05 by ANOVA). In addition, significant differences were noted between the fed and fasted groups in the amount of insulin delivered by the portal venous system to the liver (p less than 0.001 by ANOVA). Hepatic oxygen consumption was related to insulin delivery (r2 = 0.46; p less than 0.001) for both groups. The data suggest that acute changes in the nutritional status of both the donor and the recipient may affect hepatic recovery from ischemia.


Assuntos
Jejum , Temperatura Alta , Isquemia/metabolismo , Circulação Hepática , Fígado/metabolismo , Consumo de Oxigênio , Aminoácidos/sangue , Aminoácidos/metabolismo , Animais , Veia Porta , Valores de Referência , Suínos
11.
Arch Surg ; 130(5): 544-7; discussion 547-8, 1995 May.
Artigo em Inglês | MEDLINE | ID: mdl-7748095

RESUMO

OBJECTIVES: To determine the effect of increased intra-abdominal pressure (IAP) on pulmonary compliance and to determine an effective means to measure IAP. DESIGN: A prospective study. SETTING: An urban tertiary care hospital. PATIENTS: Twenty-six adult patients undergoing laparoscopic cholecystectomy. INTERVENTIONS: Intra-operative management of laparoscopic cholecystectomy requiring endotracheal intubation with general anesthesia, nasogastric and urinary bladder catheters, and position changes. Additional interventions included use of a rectal manometer and a respiratory pressure module inserted within the ventilator circuit. MAIN OUTCOME MEASURES: Correlation of changes in IAP with changes in dynamic pulmonary compliance, measured as tidal volume/(end inspiratory pressure--end expiratory pressure) and comparison of three different measurement techniques (bladder, rectal, and gastric) with a standard technique (insufflation pressure) in three different positions (supine, Trendelenburg's, and reverse Trendelenburg's). RESULTS: Compliance was significantly related to insufflation pressure (P < .001) by analysis of variance. In the gas insufflation model, the mean increment in bladder pressure reflected most closely the IAP increment in the supine position (5.7 vs 6 mm Hg) but not in the Trendelenburg (2.1 vs 6 mm Hg) and reverse Trendelenburg positions (3.4 vs 6 mm Hg). Rectal and gastric pressures were also position dependent and technically less reliable. CONCLUSIONS: Increased IAP has a major influence on pulmonary compliance (50% decrease at 16 mm Hg). Measurements of IAP by intraorgan manometry are position dependent and may not accurately reflect the intraperitoneal pressure.


Assuntos
Abdome , Colecistectomia Laparoscópica , Insuflação , Complacência Pulmonar/fisiologia , Monitorização Intraoperatória/métodos , Adulto , Humanos , Pressão , Estudos Prospectivos
12.
Arch Surg ; 119(8): 906-8, 1984 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-6743008

RESUMO

As part of an ongoing study of the operative treatment of colon injuries, 33 patients proved to have colon injury at operation had diagnostic peritoneal lavage as part of their preoperative examination. Gunshot wounds were the cause of injury in 22 (67%) of these patients and stab wounds in 11 patients (33%). The lavage was positive in only 23 (70%) of the 33 patients with operatively proved penetrating injuries of the colon. Lavage was accurate in 16 (73%) of 22 patients with gunshot wounds of the colon and seven (64%) of 11 patients with stab wounds. The overall false-negative rate for this series of patients was 30%. This study indicates that diagnostic peritoneal lavage is relatively inaccurate in the evaluation of colonic injury secondary to penetrating abdominal trauma.


Assuntos
Colo/lesões , Cavidade Peritoneal , Irrigação Terapêutica , Ferimentos Penetrantes/diagnóstico , Traumatismos Abdominais/complicações , Adolescente , Adulto , Idoso , Erros de Diagnóstico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
13.
Arch Surg ; 124(7): 833-6, 1989 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-2742485

RESUMO

Between 1983 and 1987, 114 adult patients with 131 pneumothoraces were treated utilizing catheter aspiration for simple pneumothorax as an alternative to tube thoracostomy. The causes of simple pneumothorax were as follows: 79 needle-induced, 36 spontaneous, and 16 traumatic. Thirty-eight of the pneumothoraces were small (less than 20% of volume), 55 were moderate (20% to 40% of volume), 36 were large (greater than 40% of volume), and 2 were of unknown size. Overall, catheter aspiration for simple pneumothorax was successful in 90 patients (69%). The success rate was 75% with needle-induced, 53% with spontaneous, and 75% with traumatic pneumothoraces. Small pneumothoraces were successfully managed with catheter aspiration for simple pneumothorax in 87% of patients, moderate-sized in 60%, and large in 61%. There were three complications (2.3%), including one hemothorax and two retained sheared catheter tips. The average cost per patient was +868 for catheter aspiration, and $6402 for a tube thoracostomy. These data support catheter aspiration as a safe, cost-effective, and successful technique for managing simple pneumothorax.


Assuntos
Pneumotórax/terapia , Sucção/métodos , Adolescente , Adulto , Idoso , Custos e Análise de Custo , Feminino , Humanos , Tempo de Internação , Masculino , Pessoa de Meia-Idade , Pneumotórax/etiologia , Pneumotórax/patologia , Estudos Prospectivos , Sucção/efeitos adversos , Sucção/economia , Sucção/instrumentação
14.
Diagn Microbiol Infect Dis ; 12(1): 113-8, 1989.
Artigo em Inglês | MEDLINE | ID: mdl-2714067

RESUMO

In this prospective, comparative study, 129 patients who sustained penetrating abdominal trauma were randomized to receive preoperatively, and for 3-5 days postoperatively, one of three antibiotic regimens: Group I--cefotaxime (CTX) (2 Gm Q8H), Group II--cefoxitin (2 Gm Q6H), or Group III--clindamycin (900 mg Q8H) and gentamicin (3-5 mg/kg/day in divided doses Q8H). The three groups were similar in terms of the following: age, sex, severity of injury, number of organs injured, colon injuries, shock, blood transfusions, or positive intraoperative cultures. Septic complications occurred as follows: Group I--6.9%, Group II--2.3%, and Group III--6.9%. The three regimens ranked as follows in terms of therapy costs: CTX less than cefoxitin less than clindamycin and gentamicin. It is concluded that single agent therapy with a cephalosporin is preferable to combination therapy on the basis of equivalent effectiveness, lower toxicity, and lower costs.


Assuntos
Infecções Bacterianas/prevenção & controle , Cefalosporinas/uso terapêutico , Clindamicina/uso terapêutico , Gentamicinas/uso terapêutico , Ferimentos Penetrantes/complicações , Adulto , Idoso , Cefotaxima/uso terapêutico , Cefoxitina/uso terapêutico , Custos e Análise de Custo , Quimioterapia Combinada/uso terapêutico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Distribuição Aleatória
15.
Vet Microbiol ; 79(1): 11-8, 2001 Mar 02.
Artigo em Inglês | MEDLINE | ID: mdl-11230925

RESUMO

A blocking enzyme-linked immunosorbent assay (ELISA) detecting antibodies against Actinobacillus pleuropneumoniae (Ap) serotype 6 was developed. The blocking ELISA was based on the inhibition of a polyclonal antibody raised against Ap serotype 6. Purified lipopolysaccharide from Ap serotype 6 was used as antigen. The blocking ELISA was tested against sera from pigs experimentally infected with the 12 serotypes of Ap biotype 1. Cross-reaction with serotypes 3 and 8 but not with other serotypes was observed. The sensitivity and specificity of the test on a herd level were evaluated with sera from herds naturally infected with serotypes 2, 6, 8 or 12 and with sera from herds free of infection with any Ap serotype. The blocking ELISA showed a high herd sensitivity (1.00 (0.79-1.00)) and specificity (0.97 (0.93-0.99)).


Assuntos
Infecções por Actinobacillus/veterinária , Actinobacillus pleuropneumoniae/classificação , Actinobacillus pleuropneumoniae/imunologia , Anticorpos Antibacterianos/análise , Ensaio de Imunoadsorção Enzimática/veterinária , Doenças dos Suínos/diagnóstico , Infecções por Actinobacillus/diagnóstico , Animais , Reações Cruzadas , Ensaio de Imunoadsorção Enzimática/métodos , Soros Imunes , Lipopolissacarídeos/imunologia , Coelhos , Sensibilidade e Especificidade , Sorotipagem/veterinária , Suínos , Doenças dos Suínos/microbiologia
16.
Vet Microbiol ; 79(1): 19-29, 2001 Mar 02.
Artigo em Inglês | MEDLINE | ID: mdl-11230926

RESUMO

In Denmark porcine pleuropneumonia is most frequently caused by Actinobacillus pleuropneumoniae serotype 2 (60%). Isolation of A. pleuropneumoniae from nasal cavities or tonsils from carrier animals is complicated due to the mixed bacterial flora present. An immunomagnetic separation technique (IMS) using immunomagnetic beads (Dynabeads((R))) was developed for isolation of A. pleuropneumoniae serotype 2 from pure cultures and from heterogeneous suspensions. Different coating and washing procedures were evaluated in pure and mixed cultures using polyclonal (PAb) and monoclonal antibodies. The highest reisolation yield was achieved when the beads were coated with 1.5 microg PAb IgG/10(7) beads. After washing the beads for four times 9-24% of the bacteria could be reisolated depending on the amount of IgG attached to the beads and the number of beads used. The recovery was increased to 19-61% when only two washing steps were performed. The IMS was further evaluated using dilutions of A. pleuropneumoniae with added Pasteurella multocida (10(9) CFU/ml). After two washing steps 15% of the A. pleuropneumoniae cells and no P. multocida was reisolated. A detection limit of 10 CFU/ml was found in this heterogeneous suspension. No significant difference was observed when comparing the recovery of A. pleuropneumoniae from pure culture, from mixed cultures and from artificially inoculated tonsils. From 12 pigs inoculated with an aerosol of A. pleuropneumoniae serotype 2 the bacterium could not be detected from the nasal cavity or tonsils by cultivation or PCR 6 weeks later. By using IMS A. pleuropneumoniae serotype 2 could be reisolated from the tonsils of three pigs. The IMS method represents a valuable tool for isolation of A. pleuropneumoniae from tissue samples.


Assuntos
Infecções por Actinobacillus/veterinária , Actinobacillus pleuropneumoniae/isolamento & purificação , Separação Imunomagnética/veterinária , Doenças dos Suínos/microbiologia , Infecções por Actinobacillus/microbiologia , Animais , Imunoglobulina G/isolamento & purificação , Separação Imunomagnética/métodos , Cavidade Nasal/microbiologia , Tonsila Palatina/microbiologia , Pasteurella multocida/isolamento & purificação , Coelhos , Suínos
17.
Vet Microbiol ; 71(1-2): 81-7, 2000 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-10665536

RESUMO

The reference strains of the 12 serotypes of Actinobacillus pleuropneumoniae express one or two of three different RTX exotoxins designated Apx I, Apx II and Apx III. The toxins are important virulence factors. In the present study, ELISAs with purified Apx I, Apx II and Apx III, respectively, as antigen were evaluated as candidates for serological diagnosis of Actinobacillus pleuropneumoniae infection in pigs. The pigs were inoculated with biotype 1, serotypes 1-12, and biotype 2, serotype 14, respectively. A strong humoral antibody response was seen to all the three antigens in most pigs irrespective of the serotype used for inoculation. However, titers to the exotoxins secreted by the serotype used for inoculation were generally highest. The results show that toxin proteins of Actinobacillus pleuropneumoniae are antigenically related and that a correlation between serotype and secretion of exotoxin is not revealed serologically in the ELISA test.


Assuntos
Actinobacillus pleuropneumoniae/imunologia , Anticorpos Antibacterianos/análise , Proteínas de Bactérias/imunologia , Toxinas Bacterianas/imunologia , Infecções por Actinobacillus/imunologia , Infecções por Actinobacillus/microbiologia , Infecções por Actinobacillus/veterinária , Actinobacillus pleuropneumoniae/patogenicidade , Animais , Proteínas de Bactérias/análise , Toxinas Bacterianas/análise , Ensaio de Imunoadsorção Enzimática/métodos , Ensaio de Imunoadsorção Enzimática/veterinária , Proteínas Hemolisinas , Soros Imunes , Pleuropneumonia/imunologia , Pleuropneumonia/microbiologia , Pleuropneumonia/veterinária , Organismos Livres de Patógenos Específicos , Suínos , Doenças dos Suínos/imunologia , Doenças dos Suínos/microbiologia , Virulência
18.
Vet Microbiol ; 54(1): 23-34, 1997 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-9050168

RESUMO

200 SPF pigs were infected by aerosol with Mycoplasma hyopneumoniae and the development of clinical signs, serological and pathological reactions were studied. Mean time to onset of coughing was 13 days. A mean delay of 9 days was observed from onset of coughing until seroconversion against M. hyopneumoniae as measured by ELISA. At an individual level, the sensitivity for this ELISA was estimated to 98-100% and the specificity to 93-100%. Pasteurella multocida was isolated from the majority of the lungs 4 weeks post inoculation with M. hyopneumoniae and the lung lesions in pigs were significantly larger when P. multocida was present as compared to pigs with M. hyopneumoniae alone. An evaluation of cultivation, immunofluorescence, ELISA and polymerase chain reaction for demonstration of M. hyopneumoniae in lungs showed that all four methods have a high sensitivity in the acute stages of pneumonia. In the later stages the sensitivity of cultivation was superior to the other methods. No differences in specificity were observed between the methods. The antigen-ELISA OD values and the immunofluorescence scores revealed a strong positive correlation. Nasal swabs were additionally used for demonstration of M. hyopneumoniae and the polymerase chain reaction was found superior to the other methods.


Assuntos
Pulmão/microbiologia , Infecções por Mycoplasma/veterinária , Mycoplasma/isolamento & purificação , Doenças dos Suínos , Análise de Variância , Animais , Anticorpos Antibacterianos/sangue , Distribuição de Qui-Quadrado , Ensaio de Imunoadsorção Enzimática , Pulmão/patologia , Mycoplasma/crescimento & desenvolvimento , Infecções por Mycoplasma/diagnóstico , Infecções por Mycoplasma/fisiopatologia , Mucosa Nasal/microbiologia , Pasteurella multocida/isolamento & purificação , Reação em Cadeia da Polimerase , Análise de Regressão , Manejo de Espécimes , Suínos
19.
JPEN J Parenter Enteral Nutr ; 11(2): 202-4, 1987.
Artigo em Inglês | MEDLINE | ID: mdl-3108544

RESUMO

Feeding jejunostomy has become a useful method of feeding many patients with upper digestive tract dysfunction from a variety of causes. Although problems infrequently do occur with the tube itself, such as dislodgement or obstruction, most patients tolerate the procedure well. We report here a case of perforation of the jejunum that was caused by the tube itself and required reoperation. As with many problems in surgery, careful attention to technical details should help prevent this and other problems after feeding tube insertion.


Assuntos
Nutrição Enteral/efeitos adversos , Perfuração Intestinal/etiologia , Intubação Gastrointestinal/efeitos adversos , Doenças do Jejuno/etiologia , Humanos , Masculino , Pessoa de Meia-Idade
20.
Am Surg ; 56(4): 245-50, 1990 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-2194416

RESUMO

The management of 25 pregnant patients (gestational age 4-40 weeks) treated at Henry Ford Hospital from 1980-86 was reviewed. Eleven women were treated for a variety of nontraumatic general surgical emergencies including cholecystitis, appendicitis, pancreatitis, and gastrointestinal obstruction. Fourteen women were treated after sustaining traumatic injuries. Ten patients were managed without operation and 15 required surgical intervention as part of their treatment. Diagnostic studies that proved helpful included diagnostic peritoneal lavage, ultrasonography, intravenous pyelography, and roentgenograms of the chest and abdomen. There were no maternal deaths, but two fetal deaths occurred as a result of traumatic injuries. Five women and one neonate developed major complications requiring prolonged hospitalization. Early aggressive resuscitation and thorough diagnostic evaluation are required to achieve a favorable outcome in the management of the pregnant patient who presents with an emergent general surgical problem.


Assuntos
Complicações na Gravidez/cirurgia , Ferimentos e Lesões/cirurgia , Traumatismos Abdominais/cirurgia , Doença Aguda , Adulto , Algoritmos , Emergências , Estudos de Avaliação como Assunto , Feminino , Sofrimento Fetal/diagnóstico , Monitorização Fetal , Idade Gestacional , Humanos , Lavagem Peritoneal , Gravidez , Complicações na Gravidez/diagnóstico , Complicações na Gravidez/terapia , Estudos Retrospectivos , Ultrassonografia , Ferimentos e Lesões/diagnóstico , Ferimentos e Lesões/terapia , Ferimentos não Penetrantes/cirurgia
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