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1.
Heliyon ; 8(11): e11554, 2022 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-36411938

RESUMEN

Background and aim: Animal modelling of arthritis is often associated with pain and suffering. Severity may be reduced with the use of analgesia which is, however, often withheld due to concerns of introducing a confounding variable. It is therefore important to design and validate pain relief protocols that reduce pain without compromising the scientific objectives. The present study evaluated the effect of buprenorphine analgesia in the immediate post-induction period of an adjuvant-induced monoarthritic rat model. The aim of this study was to extend previous work on refinement of the model by alleviating unnecessary pain. Methods: Male and female Sprague Dawley rats were injected with 20 µl of complete Freund's adjuvant (CFA) into the left ankle. Rats were treated with buprenorphine, either injected subcutaneously or ingested voluntarily, and were compared to rats given subcutaneous injections with vehicle (saline or pure nut paste) or carprofen the first three days post CFA-injection. Measurements of welfare, clinical model-specific parameters and pain-related behaviour were assessed. Results: Buprenorphine, administered either subcutaneously (0.10 or 0.15 mg/kg, twice daily) or by voluntary ingestion in nut paste (1.0 or 3.0 mg/kg, twice daily), improved mobility, stance, rearing and lameness scores significantly 7 h post CFA-injection. Mechanical hyperalgesia peaked at 7 h and was significantly lower in buprenorphine-treated animals, compared to vehicle-treated animals. Joint circumference was highest 24-72 h after CFA injection. Animals treated with buprenorphine did not decrease in joint circumference, opposite carprofen treated animals. Conclusion: Buprenorphine, administered either subcutaneously or by voluntary ingestion, provides adequate analgesia for both sexes within the first 24 h post CFA-injection. Buprenorphine treatment improved clinical scores and appeared not to suppress the inflammatory response. The present study supports previous findings that voluntarily ingested buprenorphine is an effective alternative to repeated injections.

2.
J Comp Pathol ; 179: 7-24, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32958151

RESUMEN

Bone loss is a major complication of osteomyelitis and from numerous in-vitro studies, it has been concluded that the bone lysis is caused by elevated expression of the receptor activator of nuclear factor κB ligand (RANKL), leading to increased osteoclast activity. However, we failed to find any relationship between bone loss and osseous RANKL expression in a porcine model of acute and chronic implant-associated osteomyelitis (IAO) due to Staphylococcus aureus or in chronic osteomyelitis lesions in slaughter pigs. Surprisingly, we found that the expression of RANKL was reduced during chronic bone infections. This is in line with the few studies conducted on human samples. A significant bone loss was observed in IAO lesions and in lesions from slaughter pigs, but with no indication of osteoclast involvement using histochemistry, immunohistochemistry for RANKL, receptor activator of nuclear factor kappa-B, osteoprotegerin and cathepsin K, and high-throughput quantitative real-time polymerase chain reaction on bone tissue from osteomyelitic lesions. A strong inflammatory response was seen in the infected animals and, therefore, we propose proteolytic enzymes induced by inflammation to be a major component of the bone loss. Furthermore, we found a significant upregulation of the IL26 gene in infected animals, which can inhibit RANKL-induced osteoclastogenesis, but has no homologue in mice. This finding emphasises that neither murine models nor in-vitro studies can mirror human disease development completely. The present study emphasises that the interactions between microorganisms, the immune system and bone cells in osteomyelitis are too complex to be accurately represented by an in-vitro model.


Asunto(s)
Modelos Animales de Enfermedad , Osteomielitis/metabolismo , Osteomielitis/patología , Ligando RANK/metabolismo , Animales , Porcinos
3.
J Comp Pathol ; 179: 83-88, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32958154

RESUMEN

During the mid-1700s, development of the veterinary profession was largely focussed on equine medicine and surgery. Subsequently, rather erratic development encompassed other species and eventually led to specialization in different disciplines. Teaching of veterinary pathology was well established in Europe and North America by the late 19th century. Specialization in this discipline was boosted in the 1940s by the formation, in the USA, of the Register of Veterinary Pathology and American College of Veterinary Pathologists. National societies followed soon afterwards in Europe. The European Society of Veterinary Pathology evolved during this period and the European College of Veterinary Pathologists (ECVP) was created in 1995 to promote high standards in the discipline. As an accrediting body, its emphasis is on training and harmonization across Europe. There is an increasing demand for high-grade forensic veterinary pathology reports which address the requirements of the legal system, but so far only a few countries have defined protocols for these reports. In recognition of the need for a specific qualification that benchmarks the competences and experience expected of forensic veterinary pathologists, the ECVP recently launched the Certificate in Forensic Veterinary Pathology.


Asunto(s)
Educación en Veterinaria/historia , Patologia Forense/educación , Patologia Forense/historia , Patología Veterinaria/educación , Patología Veterinaria/historia , Animales , Europa (Continente) , Historia del Siglo XVIII , Historia del Siglo XIX , Historia del Siglo XX , Historia del Siglo XXI
4.
J Bone Joint Surg Am ; 101(21): 1894-1903, 2019 Nov 06.
Artículo en Inglés | MEDLINE | ID: mdl-31567666

RESUMEN

BACKGROUND: In recent years, animal models of bone infections have been used with increased frequency in order to evaluate novel diagnostic and anti-infective technologies, like antibacterial coating of bone implants or local antibiotic carrier products. Therefore, it is highly relevant to evaluate the scientific quality of existing bone infection models. METHODS: We conducted a systematic review of 316 studies of large non-rodent animal models of bone infection (254 rabbit, 16 pig, 23 dog, 11 goat, and 12 sheep) and extracted data on study design, methodological quality, and postmortem evaluation of infection with respect to reporting and quantification of pathology and microbiology. RESULTS: The review demonstrated a substantial lack of study-design information, which hampers reproducibility and continuation of the established work. Furthermore, the methodological study quality was found to be low, as the definition of infection, randomization, power analysis, and blinding were only seldomly reported. The use of histology increased in recent years, but a semi-quantitative scoring of the lesions was often missing, i.e. no objective quantification of outcome. Most of the studies focused on whether the inoculated bacteria were present within the bone tissue post mortem or not. However, very often the bacterial burden was not quantified. In many of the models, different antimicrobial interventions were examined and, although antimicrobial effects were commonly described, a lack of complete sterile outcome was observed in many models. On the basis of the systematic review, we established a study template providing a guideline for the standard reporting of animal models of bone infections, including details related to the animal, pathogen, infected animal, and postmortem analysis that are of crucial importance for validation of results and reproducibility. CONCLUSIONS: As the aim of many bone infection models is to examine the effect of an intervention, the guideline emphasizes the importance of objective quantification of outcome, e.g., blinded quantitative scoring of histological findings and quantification of bacterial burden within tissue and on inserted implants. Less than 5% of the analyzed studies adhered completely to the ideal form presented in the study template. CLINICAL RELEVANCE: Anti-infective interventions must be tested in preclinical animal models before implementation in human patients, and optimal design and validation is essential for a high translational value.


Asunto(s)
Infecciones Bacterianas/terapia , Enfermedades Óseas/terapia , Proyectos de Investigación/normas , Informe de Investigación/normas , Animales , Modelos Animales de Enfermedad , Perros , Cabras , Guías como Asunto , Conejos , Ovinos , Porcinos
5.
Ren Fail ; 40(1): 640-648, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30403908

RESUMEN

INTRODUCTION: Chronic kidney disease (CKD) is a global health concern, but the current treatments only slow down the progression. Thus an improved understanding of the pathogenesis and novel treatments of CKD are needed. The nephrotoxic nephritis (NTN) model has the potential to study the pathogenesis of CKD as it resembles human CKD. The classical treatments with angiotensin II receptor blocker (ARB) or the angiotensin-converting enzyme inhibitor (ACE I) have shown a clinical effect in CKD. METHODS: We characterized the disease development in the NTN model over 11 weeks by investigating functional and histopathological changes. We tested doses of 15 and 30 mg/kg/day enalapril and losartan in the NTN model in order to investigate the effect of inhibiting the renin-angiotensin-system (RAS). RESULTS: The NTN model displayed albuminuria peaking on days 6-7, mesangial expansion (ME), renal fibrosis, inflammation and iron accumulation peaking on day 42. However, albuminuria, ME, renal fibrosis and inflammation were still significantly present on day 77, suggesting that the NTN model is useful for studying both the acute and chronic disease phases. Enalapril and losartan significantly enhanced the glomerular filtration rate (GFR) and decreased albuminuria, ME, renal fibrosis and inflammation of NTN-induced kidney disease in mice. CONCLUSIONS: This is the first study showing a comprehensive pathological description of the chronic features of the murine NTN model and that inhibiting the RAS pathway show a significant effect on functional and morphological parameters.


Asunto(s)
Albuminuria/tratamiento farmacológico , Antagonistas de Receptores de Angiotensina/farmacología , Inhibidores de la Enzima Convertidora de Angiotensina/farmacología , Riñón/patología , Nefritis/tratamiento farmacológico , Animales , Modelos Animales de Enfermedad , Enalapril/farmacología , Tasa de Filtración Glomerular/efectos de los fármacos , Losartán/farmacología , Ratones , Nefritis/inducido químicamente , Sistema Renina-Angiotensina/efectos de los fármacos
6.
Int J Nephrol ; 2018: 8424502, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29692933

RESUMEN

Using the nonaccelerated murine nephrotoxic nephritis (NTN) as a model of chronic kidney disease (CKD) could provide an easily inducible model that enables a rapid test of treatments. Originally, the NTN model was developed as an acute model of glomerulonephritis, but in this study we evaluate the model as a CKD model and compare CD1 and C57BL/6 female and male mice. CD1 mice have previously showed an increased susceptibility to CKD in other CKD models. NTN was induced by injecting nephrotoxic serum (NTS) and evaluated by CKD parameters including albuminuria, glomerular filtration rate (GFR), mesangial expansion, and renal fibrosis. Both strains showed significant albuminuria on days 2-3 which remained significant until the last time point on days 36-37 supporting dysfunctional filtration also observed by a significantly declined GFR on days 5-6, 15-17, and 34-37. Both strains showed early progressive mesangial expansion and significant renal fibrosis within three weeks suggesting CKD development. CD1 and C57BL/6 females showed a similar disease progression, but female mice seemed more susceptible to NTS compared to male mice. The presence of albuminuria, GFR decline, mesangial expansion, and fibrosis showed that the NTN model is a relevant CKD model both in C57BL/6 and in CD1 mice.

7.
BMC Vet Res ; 13(1): 135, 2017 May 22.
Artículo en Inglés | MEDLINE | ID: mdl-28532438

RESUMEN

BACKGROUND: Individual differences of mink, including color type, are speculated to affect the course of wound healing, thereby impacting wound assessment and management on the farms, as well as the assessment of wounds in forensic cases. In this study, we examined the effect of color type on early wound healing in farmed mink. Full thickness excisional wounds (2 × 2 cm) were made on the back in 18 mink of the color types Brown, Silverblue and Blue Iris. Gross and microscopic pathology of the wounds was evaluated 2 days post-wounding together with degree of wound size reduction, presence of bacteria and blood analyses. RESULTS: Pathological examination on day 2 showed the greatest mean wound size reduction in Brown mink (11.0%) followed by Blue Iris (7.9%) and Silverblue (1.6%). Bacteria were cultured from all wounds, and predominantly Staphylococcus species were recovered in mixed or pure culture. Histopathology from day 2 wounds showed a scab overlying necrotic wound edges, which were separated from underlying vital tissue by a demarcation zone rich in polymorphonuclear leukocytes. Fibroblasts and plump endothelial cells were more numerous in the deeper tissues. Complete blood count parameters were within normal ranges in most cases, however, the mink showed mildly to markedly decreased hematocrit and six mink of the color types Silverblue and Blue Iris showed moderately elevated numbers of circulating segmented neutrophils on day 2. There was a marked increase in concentration of serum amyloid A from day 0 to day 2 in all color types. CONCLUSIONS: We have described differences in early wound healing between mink of the color types Brown, Silverblue and Blue Iris by use of an experimental wound model in farmed mink. The most pronounced difference pertained to the degree of wound size reduction which was greatest in Brown mink, followed by Blue Iris and Silverblue, respectively.


Asunto(s)
Color del Cabello , Visón , Cicatrización de Heridas , Heridas y Lesiones/veterinaria , Animales , Masculino , Heridas y Lesiones/microbiología , Heridas y Lesiones/patología
8.
Vet Pathol ; 53(3): 666-73, 2016 May.
Artículo en Inglés | MEDLINE | ID: mdl-26333293

RESUMEN

The aim of this study was to evaluate gross and histologic lesions and epidemiologic factors of foot lesions in farmed mink. The feet of 1159 mink from 4 Danish farms were examined and lesions described. Swabs from the lesions were taken from 27 mink for microbiology, and tissue samples from a representative spectrum of feet with and without lesions (n= 22) were examined histologically. Feet were grouped according to gross inspection: no lesions (55.1%), hair loss (7.1%), hyperkeratosis (35.8%), and crusting (5.3%). Lesions were predominantly located in plantar metatarsal skin (98.1%). Staphylococci were the most prevalent microorganisms cultured from the lesions. There was a significant association between presence of lesions and sex (P< .0001), age (P< .0001), and color type (P= .023). Lesion size was significantly different between hair loss and crusts and between hyperkeratosis and crusts (P< .0001). Histologically, lesions included varying degrees of orthokeratotic to parakeratotic hyperkeratosis and granulomatous to pyogranulomatous dermatitis with trichogranulomas as a dominant feature in all mink. The gross and microscopic lesions were comparable to physically induced changes in other species that develop as a response to repetitive friction or pressure. The condition may have an impact on animal welfare in mink production.


Asunto(s)
Enfermedades del Pie/veterinaria , Visón , Animales , Estudios Transversales , Dinamarca/epidemiología , Granjas , Femenino , Pie/patología , Enfermedades del Pie/epidemiología , Enfermedades del Pie/patología , Masculino
9.
Animal ; 9(4): 677-81, 2015 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-25482535

RESUMEN

In pig production, piglets are tail docked at birth in order to prevent tail biting later in life. In order to examine the effects of tail docking and docking length on the formation of neuromas, we used 65 pigs and the following four treatments: intact tails (n=18); leaving 75% (n=17); leaving 50% (n=19); or leaving 25% (n=11) of the tail length on the pigs. The piglets were docked between day 2 and 4 after birth using a gas-heated apparatus, and were kept under conventional conditions until slaughter at 22 weeks of age, where tails were removed and examined macroscopically and histologically. The tail lengths and diameters differed at slaughter (lengths: 30.6±0.6; 24.9±0.4; 19.8±0.6; 8.7±0.6 cm; P<0.001; tail diameter: 0.5±0.03; 0.8±0.02; 1.0±0.03; 1.4±0.04 cm; P<0.001, respectively). Docking resulted in a higher proportion of tails with neuromas (64 v. 0%; P<0.001), number of neuromas per tail (1.0±0.2 v. 0; P<0.001) and size of neuromas (1023±592 v. 0 µm; P<0.001). The results show that tail docking piglets using hot-iron cautery causes formation of neuromas in the outermost part of the tail tip. The presence of neuromas might lead to altered nociceptive thresholds, which need to be confirmed in future studies.


Asunto(s)
Neuroma/veterinaria , Enfermedades de los Porcinos/etiología , Porcinos , Cola (estructura animal)/cirugía , Muñones de Amputación/patología , Muñones de Amputación/veterinaria , Animales , Cauterización/efectos adversos , Cauterización/veterinaria , Calor/efectos adversos , Neuroma/etiología , Neuroma/patología , Enfermedades de los Porcinos/patología
10.
Vet Pathol ; 52(1): 83-91, 2015 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-24503437

RESUMEN

Porcine melanomas have proven interesting in a wider biological perspective due to a common phenomenon of spontaneous regression, which is characterized by infiltration of macrophages, among others. Separation of neoplastic melanocytes from pigment-laden macrophages may, however, be challenging as the morphology of melanocytes varies considerably and sometimes resembles macrophages. The aim of this study was correspondingly to characterize and differentiate the cells in 20 porcine melanocytomas and regional lymph nodes by histologic examination and immunohistochemistry for melan A, PNL2, S100, lysozyme, alpha-1-antitrypsin, and ionized calcium binding adaptor molecule 1 (Iba1). Grossly, the melanocytomas were divided into 2 distinct types: pigmented maculae (n = 7) and raised tumors (n = 13). In the maculae, the pigmented cells were mainly melanocytes reactive for melan A, PNL2 and S100. In contrast, the majority of the cells in the raised tumors were melanophages, which expressed Iba1, alpha-1-antitrypsin, and lysozyme. Yet, cells histomorphologically indistinguishable from the melanophages expressed melan A and PNL2. These cells were Iba1 and S100 negative, and ultrastructurally, they were devoid of lysosomal bodies and filled with stage III and IV melanosomes. In the regional lymph nodes, melanocytes were present in the trabecular sinuses. In focally or diffusely black lymph nodes, pigmentation was, however, mainly due to aggregates of melanophages, which were confined to the trabeculae, deep cortex, and peripheral lymphoreticular tissue. Normal and neoplastic porcine melanocytes express melan A and PNL2, and immunohistochemical staining for melan A, PNL2, and Iba1 was found useful to identify and distinguish melanocytes and melanophages in porcine melanotic lesions.


Asunto(s)
Biomarcadores de Tumor/metabolismo , Melanoma/veterinaria , Neoplasias Cutáneas/veterinaria , Enfermedades de los Porcinos/patología , Mataderos , Animales , Diferenciación Celular , Inmunohistoquímica/veterinaria , Ganglios Linfáticos/metabolismo , Ganglios Linfáticos/patología , Macrófagos/metabolismo , Macrófagos/patología , Melanocitos/metabolismo , Melanocitos/patología , Melanoma/metabolismo , Melanoma/patología , Melanosomas/metabolismo , Melanosomas/patología , Neoplasias Cutáneas/metabolismo , Neoplasias Cutáneas/patología , Porcinos , Enfermedades de los Porcinos/metabolismo
11.
Vet Rec ; 173(21): 526, 2013 Nov 30.
Artículo en Inglés | MEDLINE | ID: mdl-24197436

RESUMEN

Bruises in pigs inflicted by blunt trauma are a significant animal welfare problem, and affected skin and underlying muscle are regularly submitted for forensic investigation. Central to the evaluation is an assessment of the age of the bruises. This paper presents cases of bruises in pigs sent for forensic investigation that were collected retrospectively. Data comprised photographs of the gross lesions, slides for histology, and written reports. The time from collecting the animals at the farms and delivery to the slaughterhouse was recorded together with the time of slaughter. Since 2005 there has been an increase in cases, with a peak in 2008 and 2009 of 40 cases for each year. At gross examination, the pattern of bruises often reflected the type of object which caused them. Histologically, haemorrhage and cellular infiltrations were frequently present. Currently, the age of bruises may be estimated to be more or less than four hours based on a porcine bruise model. In bruises more than four hours old, estimations of two-hour intervals are used based on studies of wound healing. The time from collecting the pigs at the farms until slaughter was between one and four hours in 44.1 per cent of cases, during which time the pigs had been handled by several people. In addition, in 22.0 per cent of cases of bruising an inflammatory response was absent, making it impossible to estimate the age of the bruise.


Asunto(s)
Contusiones/veterinaria , Patologia Forense/estadística & datos numéricos , Porcinos/lesiones , Mataderos , Bienestar del Animal , Animales , Contusiones/epidemiología , Contusiones/patología , Dinamarca/epidemiología , Estudios Retrospectivos
12.
Vet J ; 198(3): 666-71, 2013 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-24269106

RESUMEN

Shoulder ulcerations are common in breeding sows in production systems but the consequences for the animals in terms of pain or discomfort are not well-described. This study presents data from a histopathological examination of shoulders of sows, specially focusing on the peripheral nerves in the region and the behavioural responses towards palpation of animals with traumatic neuromas but without ulcers. The study included 155 sows from seven Danish herds initially screened and stratified according to absence/presence and size of shoulder ulcers 3-4 weeks post-partum, out of which 71 were free of ulcerations and 84 had different stages of ulceration. Before collection, sows were subjected to shoulder palpation and behavioural responses were registered. From the consecutive pattern of development of ulcerations it is evident that shoulder ulcerations develop from top-to-bottom. A high frequency of traumatic neuromas was found in both healed and unhealed lesions. The observation of viable nerve-ends in shoulder ulcerations makes it likely that ulcerations are associated with pain. Moreover, the presence of traumatic neuromas in healed ulcerations indicates that there is discomfort even after the lesions have healed. This is further supported by the behavioural finding that rubbing behaviour in response to palpation was increased on the day of sample collection of the shoulders in sows with traumatic neuromas but without shoulder ulcers (P=0.053). Further studies are needed for final confirmation but these results suggest that shoulder ulcers may be associated with pain even after healing.


Asunto(s)
Actividad Motora , Nervios Periféricos/patología , Úlcera por Presión/veterinaria , Hombro/patología , Enfermedades de los Porcinos/patología , Animales , Femenino , Palpación/veterinaria , Úlcera por Presión/etiología , Úlcera por Presión/patología , Porcinos , Enfermedades de los Porcinos/etiología
13.
J Comp Pathol ; 149(4): 463-74, 2013 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-23746745

RESUMEN

Sepsis is a common and often fatal complication in human patients in intensive care units. Relevant and well characterized animal models of sepsis may provide valuable information on pathophysiological mechanisms and be a mean of testing new therapeutic strategies. Large animal models of Staphylococcus aureus sepsis are rare, even though S. aureus increasingly affects human patients. Sepsis changes the haemostatic balance and leads to endothelial cell (EC) activation, coagulopathy and, in severe cases, disseminated intravascular coagulation (DIC). The aim of this study was to characterize the haemostatic and vascular alterations in a novel porcine model of severe S. aureus sepsis, investigating whether the changes fulfill the human clinical criteria for DIC. Five pigs were inoculated intravenously with S. aureus and two control animals were sham-inoculated. Blood samples were collected for thromboelastography (TEG) and assessment of plasma-based haemostatic parameters. Tissue was collected for histopathology and reverse transcriptase quantitative real-time polymerase chain reaction for measurement of mRNA encoding EC markers. All infected animals developed DIC; including procoagulant activation represented by hypercoagulable TEG profiles and prolonged clotting time. Histologically, numerous pulmonary thrombi were present in one pig. Inhibitor consumption was represented by decreasing antithrombin levels in infected pigs. Hyaline globules were found in three infected pigs, confirming fibrinolytic activation. EC activation was identified by expression of von Willebrand factor in small vessels together with elevated mRNA encoding activated EC markers. Severe haemostatic and vascular changes fulfilling the human criteria for DIC were therefore seen in all infected pigs. A tendency towards uncompensated DIC was seen in two animals.


Asunto(s)
Modelos Animales de Enfermedad , Coagulación Intravascular Diseminada/fisiopatología , Infecciones Estafilocócicas/fisiopatología , Animales , Coagulación Intravascular Diseminada/etiología , Coagulación Intravascular Diseminada/patología , Femenino , Humanos , Reacción en Cadena en Tiempo Real de la Polimerasa , Sepsis , Infecciones Estafilocócicas/complicaciones , Infecciones Estafilocócicas/patología , Staphylococcus aureus , Porcinos
14.
J Comp Pathol ; 149(2-3): 372-5, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-23351505

RESUMEN

Reports of dermatophytosis in reptiles are rare. This report describes the microscopical and immunohistochemical findings in a case of dermatophytosis caused by Trichophyton spp. in a 2-year-old Tenerife lizard (Gallotia galloti) with ulcerative and pustular skin lesions. Microscopically, the lesions were characterized by superficial epidermal pustules containing heterophils with numerous fungal hyphae that stained by periodic acid-Schiff and Grocott's stain. Fungal culture was not performed, but a panel of polyclonal antibodies specific for different fungal genera was applied to tissue sections. These immunohistochemical studies demonstrated reactivity of the hyphae only with antiserum specific for Trichophyton spp.


Asunto(s)
Lagartos/microbiología , Tiña/veterinaria , Animales , Femenino , Inmunohistoquímica , Tiña/microbiología , Tiña/patología , Trichophyton
16.
Vet Pathol ; 50(3): 534-42, 2013 May.
Artículo en Inglés | MEDLINE | ID: mdl-23242804

RESUMEN

Tumors of the adrenal glands are among the most frequent tumors in cattle; however, few studies have been conducted to describe their characteristics. The aim of this study was to classify 41 bovine adrenal neoplasms from 40 animals based on macroscopic and histologic examination, including electron microscopy and immunohistochemistry for melan A, synaptophysin, chromogranin A, vimentin, pan-cytokeratin, 2',3'-cyclic nucleotide-3'-phosphohydrolase (CNPase), and Ki-67. The tumors were classified as 23 adrenocortical adenomas, 12 adrenocortical carcinomas, 2 schwannomas, 2 pheochromocytomas (1 malignant), and 1 ganglioneuroma. Five histologic features were characteristic of metastasizing adrenocortical tumors: invasion of the capsule, vascular invasion, diffuse growth pattern, spindle-cell morphology, and nuclear pleomorphism. Adrenocortical tumors with at least 3 of these features were classified as malignant. Immunohistochemically, adrenocortical tumors expressed melan A (16/19), vimentin (14/26), cytokeratin (11/26), and chromogranin A (9/27), whereas pheochromocytomas expressed chromogranin A (2/2), synaptophysin (2/2), and vimentin (1/2). Both schwannomas expressed CNPase. An immunohistochemistry panel consisting of antibodies against melan A, synaptophysin, and CNPase was considered most useful to classify bovine adrenal tumors. However, the distinction between benign and malignant adrenocortical tumors was based on histologic features as in human medicine.


Asunto(s)
Neoplasias de las Glándulas Suprarrenales/veterinaria , Adenoma Corticosuprarrenal/veterinaria , Carcinoma Corticosuprarrenal/veterinaria , Biomarcadores de Tumor/metabolismo , Enfermedades de los Bovinos/clasificación , 2',3'-Nucleótido Cíclico Fosfodiesterasas/metabolismo , Mataderos , Neoplasias de la Corteza Suprarrenal/clasificación , Neoplasias de la Corteza Suprarrenal/patología , Neoplasias de la Corteza Suprarrenal/veterinaria , Neoplasias de las Glándulas Suprarrenales/clasificación , Neoplasias de las Glándulas Suprarrenales/patología , Glándulas Suprarrenales/patología , Glándulas Suprarrenales/ultraestructura , Adenoma Corticosuprarrenal/clasificación , Adenoma Corticosuprarrenal/patología , Carcinoma Corticosuprarrenal/clasificación , Carcinoma Corticosuprarrenal/patología , Animales , Bovinos , Enfermedades de los Bovinos/patología , Cromogranina A/metabolismo , Dinamarca , Humanos , Inmunohistoquímica/veterinaria , Queratinas/metabolismo , Antígeno MART-1/metabolismo , Microscopía Electrónica/veterinaria , Sinaptofisina/metabolismo , Vimentina/metabolismo
17.
Clin Microbiol Infect ; 18 Suppl 7: 1-8, 2012 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-23137133

RESUMEN

The process to develop a guideline in a European setting remains a challenge. The ESCMID Fungal Infection Study Group (EFISG) successfully achieved this endeavour. After two face-to-face meetings, numerous telephone conferences, and email correspondence, an ESCMID task force (basically composed of members of the Society's Fungal Infection Study Group, EFISG) finalized the ESCMID diagnostic and management/therapeutic guideline for Candida diseases. By appreciating various patient populations at risk for Candida diseases, four subgroups were predefined, mainly ICU patients, paediatric, HIV/AIDS and patients with malignancies including haematopoietic stem cell transplantation. Besides treatment recommendations, the ESCMID guidelines provide guidance for diagnostic procedures. For the guidelines, questions were formulated to phrase the intention of a given recommendation, for example, outcome. The recommendation was the clinical intervention, which was graded by a score of A-D for the 'Strength of a recommendation'. The 'level of evidence' received a score of I-III. The author panel was approved by ESCMID, European Organisation for Research and Treatment of Cancer, European Group for Blood and Marrow Transplantation, European Society of Intensive Care Medicine and the European Confederation of Medical Mycology. The guidelines followed the framework of GRADE and Appraisal of Guidelines, Research, and Evaluation. The drafted guideline was presented at ECCMID 2011 and points of discussion occurring during that meeting were incorporated into the manuscripts. These ESCMID guidelines for the diagnosis and management of Candida diseases provide guidance for clinicians in their daily decision-making process.


Asunto(s)
Candidiasis/diagnóstico , Medicina Basada en la Evidencia/normas , Guías de Práctica Clínica como Asunto , Candidiasis/complicaciones , Europa (Continente) , Testimonio de Experto , Humanos
18.
Clin Microbiol Infect ; 18 Suppl 7: 9-18, 2012 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-23137134

RESUMEN

As the mortality associated with invasive Candida infections remains high, it is important to make optimal use of available diagnostic tools to initiate antifungal therapy as early as possible and to select the most appropriate antifungal drug. A panel of experts of the European Fungal Infection Study Group (EFISG) of the European Society of Clinical Microbiology and Infectious Diseases (ESCMID) undertook a data review and compiled guidelines for the clinical utility and accuracy of different diagnostic tests and procedures for detection of Candida infections. Recommendations about the microbiological investigation and detection of candidaemia, invasive candidiasis, chronic disseminated candidiasis, and oropharyngeal, oesophageal, and vaginal candidiasis were included. In addition, remarks about antifungal susceptibility testing and therapeutic drug monitoring were made.


Asunto(s)
Antifúngicos/farmacología , Candida/aislamiento & purificación , Candidiasis/diagnóstico , Candidiasis/tratamiento farmacológico , Antifúngicos/uso terapéutico , Biomarcadores/análisis , Candida/efectos de los fármacos , Medicina Basada en la Evidencia , Humanos , Pruebas de Sensibilidad Microbiana
19.
Clin Microbiol Infect ; 18 Suppl 7: 19-37, 2012 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-23137135

RESUMEN

This part of the EFISG guidelines focuses on non-neutropenic adult patients. Only a few of the numerous recommendations can be summarized in the abstract. Prophylactic usage of fluconazole is supported in patients with recent abdominal surgery and recurrent gastrointestinal perforations or anastomotic leakages. Candida isolation from respiratory secretions alone should never prompt treatment. For the targeted initial treatment of candidaemia, echinocandins are strongly recommended while liposomal amphotericin B and voriconazole are supported with moderate, and fluconazole with marginal strength. Treatment duration for candidaemia should be a minimum of 14 days after the end of candidaemia, which can be determined by one blood culture per day until negativity. Switching to oral treatment after 10 days of intravenous therapy has been safe in stable patients with susceptible Candida species. In candidaemia, removal of indwelling catheters is strongly recommended. If catheters cannot be removed, lipid-based amphotericin B or echinocandins should be preferred over azoles. Transoesophageal echocardiography and fundoscopy should be performed to detect organ involvement. Native valve endocarditis requires surgery within a week, while in prosthetic valve endocarditis, earlier surgery may be beneficial. The antifungal regimen of choice is liposomal amphotericin B +/- flucytosine. In ocular candidiasis, liposomal amphotericin B +/- flucytosine is recommended when the susceptibility of the isolate is unknown, and in susceptible isolates, fluconazole and voriconazole are alternatives. Amphotericin B deoxycholate is not recommended for any indication due to severe side effects.


Asunto(s)
Antifúngicos/uso terapéutico , Candida/efectos de los fármacos , Candidiasis/tratamiento farmacológico , Adulto , Antifúngicos/efectos adversos , Candida/aislamiento & purificación , Candidiasis/diagnóstico , Candidiasis/prevención & control , Medicina Basada en la Evidencia , Humanos
20.
Clin Microbiol Infect ; 18 Suppl 7: 38-52, 2012 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-23137136

RESUMEN

Invasive candidiasis (IC) is a relatively common syndrome in neonates and children and is associated with significant morbidity and mortality. These guidelines provide recommendations for the prevention and treatment of IC in neonates and children. Appropriate agents for the prevention of IC in neonates at high risk include fluconazole (A-I), nystatin (B-II) or lactoferrin ± Lactobacillus (B-II). The treatment of IC in neonates is complicated by the high likelihood of disseminated disease, including the possibility of infection within the central nervous system. Amphotericin B deoxycholate (B-II), liposomal amphotericin B (B-II), amphotericin B lipid complex (ABLC) (C-II), fluconazole (B-II), micafungin (B-II) and caspofungin (C-II) can all be potentially used. Recommendations for the prevention of IC in children are largely extrapolated from studies performed in adults with concomitant pharmacokinetic data and models in children. For allogeneic HSCT recipients, fluconazole (A-I), voriconazole (A-I), micafungin (A-I), itraconazole (B-II) and posaconazole (B-II) can all be used. Similar recommendations are made for the prevention of IC in children in other risk groups. With several exceptions, recommendations for the treatment of IC in children are extrapolated from adult studies, with concomitant pharmacokinetic studies. Amphotericin B deoxycholate (C-I), liposomal amphotericin B (A-I), ABLC (B-II), micafungin (A-I), caspofungin (A-I), anidulafungin (B-II), fluconazole (B-I) and voriconazole (B-I) can all be used.


Asunto(s)
Antifúngicos/uso terapéutico , Candida/aislamiento & purificación , Candidiasis Invasiva/tratamiento farmacológico , Candidiasis Invasiva/prevención & control , Adolescente , Candida/efectos de los fármacos , Candidiasis Invasiva/microbiología , Niño , Preescolar , Humanos , Lactante , Recién Nacido , Pediatría
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