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Master's Dissertation
DOI
https://doi.org/10.11606/D.10.2024.tde-12062024-105753
Document
Author
Full name
Ana Rita Carvalho Pereira
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2024
Supervisor
Committee
Teixeira, Fábio Alves (President)
Grandi, Fabrizio
Silva, Ricardo Duarte
Title in Portuguese
Diagnóstico e resposta terapêutica de colite crônica em buldogues franceses
Keywords in Portuguese
Cão
Colite granulomatosa
Diarreia crônica
Enteropatias crônicas
Abstract in Portuguese
A colite granulomatosa (CG), causada pela Escherichia coli enteroinvasiva (ECEI), é importante causa de diarreia crônica em cães, e buldogues franceses (BF) estão entre as raças mais predispostas. Outras causas de diarreias crônicas são comuns na raça, mas não há estudos comparando-as. Para CG, recentemente a técnica de imuno- histoquímica (IHQ) para ECEI, em biópsias de cólon mostrou-se eficaz como diagnóstico definitivo. O objetivo deste estudo é comparar os aspectos clínicos e histopatológicos dos BF com diarreia crônica. Foram selecionados os prontuários e os blocos de parafina de biópsias de cães BF, atendidos com diarreia crônica, em um serviço de gastroenterologia veterinária da cidade de São Paulo, no período de 2014 a 2022. Foram elaboradas novas lâminas para análise histológica, com coloração Hematoxilina e eosina (HE), ácido periódico de Schiff (PAS) e IHQ para E. coli, no Laboratório de Gastroenterologia da Veterinary Medicine & Biomedical Sciences (Texas A&M University; Estados Unidos), e posteriormente avaliadas por uma patologista veterinária diplomada pelo American College of Veterinary Pathologist. BF foram classificados entre CG e não colite granulomatosa (CNG), sendo estas subdivididas em linfoplasmocítica (LP), neutrofílica e/ou eosinofílicas (NE) ou sem infiltrado inflamatório (NI). Os dados e características do quadro clínico foram elencados dos prontuários e comparados entre as classificações diagnósticas por meio de testes estatísticos. Dos 38 animais selecionados, quatro foram excluídos por má qualidade das biópsias. Foram considerados 34 cães para avaliações histopatológicas e 29 para avaliações clínicas, pois de cinco não houve acesso ao prontuário. A CG foi diagnosticada em 38,2% (13/34) dos cães, 61,8% (21/34) foram considerados CNG: 32,4% NE, 17,6% NI e 11,8% LP. Na comparação entre CG e CNG, não houve diferença entre idade média (1,3 vs. 2,8 anos, respectivamente; p=0,20) e distribuição sexual (76,9% machos x 76,2%, p>0,99). Todos os animais receberam medicação prévia à biópsia, sendo mais frequente antibioticoterapia [79,3% (23/29)] e corticoterapia [48,0% (14/29)]. BF com CG apresentaram 20 vezes mais chance de apresentar diarreia diária que os CNG (Odds ratio 20,0; p<0,005). Outras manifestações como muco e sangue nas defecações [96,5% (28/29)], prolapso de reto [7,0% (2/29)], dor e disquezia [79,0% (23/29)], perda de peso [24,14% (7/29)], aumento da frequência de defecação [86,0% (25/29)], urgência para defecar [76,0% (22/29)] e êmese [55,0% (16/29)]. Conclui-se que o Não é possível diferenciar CG de CNG somente por variáveis clínicas, mas diarreias de intestino grosso diárias podem ser sugestivas de CG em BF.
Title in English
Diagnosis and therapeutic response of chronic colitis in french bulldogs
Keywords in English
Chronic diarrhea
Chronic enteropathies
Dog
Granulomatous colitis
Abstract in English
Granulomatous colitis (GC) is caused by adherent-invasive Escherichia coli (AIEC) (AIEC) and is an important cause of chronic diarrhea in French bulldogs (FB), one of the most predisposed breeds. Other causes of chronic diarrhea are common in the breed, but there are no studies comparing them. Recently the immunohistochemistry (IHC) proved to be effective as a definitive diagnosis for GC. The objective of this study is to compare the clinical and histopathological aspects of FB with chronic diarrhea. The medical records and paraffin blocks of biopsies from FB with chronic diarrhea attended in a veterinary gastroenterology service in the city of São Paulo, from 2014 to 2022, were selected. New slides were prepared for histological analysis, with hematoxylin and eosin (HE), periodic acid-Schiff (PAS) and IHC for E. coli, at the Gastroenterology Laboratory of Veterinary Medicine & Biomedical Sciences (Texas A&M University; United States), and subsequently evaluated by a veterinary pathologist graduated from the American College of Veterinary Pathologist. Dogs were classified as GC and non-granulomatous colitis (CNG), them subdivided into lymphoplasmacytic (LP), neutrophilic and/or eosinophilic (NE) or without inflammatory infiltrate (NI). The data and characteristics of the clinical picture were listed from the medical records and compared between the diagnostic classifications using statistical tests. Of the 38 animals selected, four were excluded due to poor quality of the biopsies and five due to lack of medical records. 34 dogs were considered for histopathological evaluations and 29 for clinical evaluations. GC was diagnosed in 38.2% (13/34) of dogs, 61.8% (21/34) were considered CNG: 32.4% NE, 17.6% NI and 11.8% LP. When comparing CG and NGC, there was no difference between mean age (1.3 vs. 2.8 years, respectively; p=0.20) and sexual distribution (76.9% males x 76.2%, p>0 .99). All animals received medication prior to biopsy, the most frequent being antibiotic therapy [79.3% (23/29)] and corticosteroid therapy [48.0% (14/29)]. FB with CG were 20 times more likely to have daily diarrhea than NGC (Odds ratio 20.0; p< 0.005). Other manifestations such as mucus and blood in defecations [96.5% (28/29)], rectal prolapse [7.0% (2/29)], pain and dyschezia [79.0% (23/29)], weight loss [24.14% (7/29)], increased frequency of defecation [86.0% (25/29)], urgency to defecate [76.0% (22/29)] and emesis [55 .0% (16/29)]. It is concluded that it is not possible to differentiate CG from CNG solely by clinical variables, but daily large intestinal diarrhea may be suggestive of CG in FB.
 
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Publishing Date
2024-07-25
 
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