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Cryptosporidium spp. in bursa of Fabricius of broiler chickens from Uruguay Ciência Rural
Casanova,Susana; Verdes,José Manuel; Okada,Kosuke.
The presence of Cryptosporidium spp. was detected in broiler chickens of 32-40 days of age, colonizing the bursa of Fabricius. The histologic study with haematoxylin and eosin staining was done on specimens of trachea, complete intestinal tract and bursa. Samples of intestinal content were also studied using Kinyoun staining technique. All birds with signs of illness were positive to the presence of parasite, showing a hypertrophic bursa of Fabricius, filled with caseous content. The bursal epithelial cells were full of different developmental stages of Cryptosporidium spp. This note describing the presence of Cryptosporidium spp. in industrial flocks of broiler chickens, is the first report of this parasite in Uruguay
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cryptosporidium spp.; Broiler chickens; Bursa of Fabricius.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000100064
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Histomorphology of bursa of Fabricius: effects of stock densities on commercial broilers Rev. Bras. Ciênc. Avic.
Muniz,EC; Fascina,VB; Pires,PP; Carrijo,AS; Guimarães,EB.
During the past few years, there has been considerable interest on the effects of stocking density on broiler behavior and immunity. Stress may cause immunodeficiency by affecting cell and humoral responses, as well as body weight decrease, and foot-pad dermatitis. The aim of this study was to study histomorphological changes of the bursa of Fabricius in broilers submitted to three different stocking densities (10, 15, and 20 birds/m²) from one to 42 days of age. Three birds from each group were sacrifieced on days 7 and 42. The bursa was collected, fixed, and processed for histomorphometric assessment using a Kontrom KS 400 image analyzer. Data were analyzed by Biostat 3.0 (Tukey Test). The results of average cortical area percentage in bursal follicles...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bursa of Fabricius; Stock density; Commercial broilers.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000400003
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Infectious bursal disease: evaluation of pathogenicity of commercial vaccines from Brazil in specific pathogen free chichens Rev. Bras. Ciênc. Avic.
Moraes,HLS; Salle,CTP; Padilha,AP; Nascimento,VP; Souza,GF; Pereira,RA; Artencio,JO; Salle,FO.
Infectious Bursal Disease (IBD) is a chicken disease economically important for the poultry industry in function of the immune depression that it causes. Disease control is made with different vaccines and vaccination programs. In present work, the pathogenicity of 3 intermediate vaccines (I1, I2 and I3), 2 intermediate more pathogenic (IP1 and IP2) and 3 vaccines containing strong virus (F1, F2 and F3) was evaluated. Birds vaccinated with IP1, IP2, F1, F2 and F3 showed significantly lower bursa size in relation to control animals and animals vaccinated with I1, I2 and I3. On the other hand, vaccines I1 and I3 induced antibody titers higher than the control and lower than I2, IP1, IP2, F1, F2 and F3. Histological scores showed that vaccines I1, I2 and I3...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bursa of Fabricius; Infectious bursal disease; Pathogenicity; Vaccines.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000400009
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Influence of sex, age, and fasting on blood parameters and body, bursa, spleen and yolk sac weights of broiler chicks Rev. Bras. Ciênc. Avic.
Pires,DL; Malheiros,EB; Boleli,IC.
The effects of water and feed fasting for 24, 48 and 72 hours post-hatching on blood parameters (mean corpuscular volume, MCV; red blood-cell, RBC; hematocrit, HCT; hemoglobin, HGB; plasma glucose, CGP; plasma total protein, PP, and differential leukocytes count), and on body, liver, spleen, bursa, and yolk sac weights were analyzed. Erythrogram data were obtained with a blood cell counter. Total plasma protein and plasma glucose were determined by using the Bradford method (1976) and a glucose PAP liquiform kit (Labtest, cat. n. 84), respectively. Specific leukocyte counts were carried out on blood smears stained with Rosenfeld solution. According to the obtained data, water and feed post-hatching fasting reduced MCV values, which also were lower in males...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Blood parameters; Broiler chicks; Bursa of Fabricius; Post-hatching fasting.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000400005
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The Gene Ontology Differs in Bursa of Fabricius Between Two Breeds of Ducks Post Hatching by Enriching the Differentially Expressed Genes Rev. Bras. Ciênc. Avic.
Liu,H; Liu,J; Zhang,T; Li,L; Wang,J; Han,C; He,H.
ABSTRACT The bursa of Fabricius (BF) is the central humoral immune organ unique to birds. The present study investigated the possible difference on a molecular level between two duck breeds. The digital gene expression profiling (DGE) technology was used to enrich the differentially expressed genes (DEGs) in BF between the Jianchang and Nonghua-P strains of ducks. DGE data identified 195 DEGs in the bursa. Gene Ontology (GO) analysis suggested that DEGs were mainly enriched in the metabolic pathways and ribosome components. Pathways analysis identified the spliceosome, RNA transport, RNA degradation process, Jak-STAT signaling pathway, TNF signaling pathway and B cell receptor signaling pathway. The results indicated that the main difference in the BF...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bursa of Fabricius; Gene ontology; Duck; Digital gene expression profiling..
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000100169
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The Pathogenesis of Experimental Infections of Cryptosporidium baileyi in Chickens OAK
Taylor, M. A.; Catchpole, J.; Marshall, R. N.; Green, J. A..
Palavras-chave: Cryptosporidiosis; Bursa of Fabricius; Histology.
Ano: 1996 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/239
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