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1.
Arq. bras. med. vet. zootec. (Online) ; 70(1): 205-212, Jan.-Feb. 2018. tab, graf
Article in Portuguese | LILACS, VETINDEX | ID: biblio-888098

ABSTRACT

O presente trabalho avaliou o papel do baço no armazenamento e na reativação das linhagens de células B, representadas por células IgM positivas imunomarcadas no tecido esplênico, bem como a funcionalidade dessas células, sobre a cinética dos linfócitos e na produção sistêmica de anticorpos em tilápias-do-nilo (Oreochromis niloticus). Foram separados dois grupos: grupo memória, constituído por peixes previamente imunizados com hemácia de carneiro a 2,5%, para a geração da memória imune, e o grupo naive, que recebeu o mesmo volume de solução salina a 0,65%. Após 32 dias, os dois grupos foram submetidos a uma nova dose do antígeno na mesma concentração, volume e via de inoculação. A reativação dos clones de memória foi evidenciada pelo aumento do número de células IgM positivas no baço do grupo memória no dia zero/pré-imune. Além disso, o mesmo grupo apresentou aumento dos títulos de anticorpos séricos no 14º dia e no número absoluto de linfócitos no 21º dia em relação ao grupo naive. Esses resultados sugerem que o baço não seja apenas um local de armazenamento, mas também de reativação de células B de memória em tilápia-do-nilo.(AU)


This work aimed to evaluate the role of the spleen in storage and reactivation of the memory B cells, represented by IgM positive cells and the systemic production of sheep antibodies anti-red cell in Nile tilapia (Oreochromis niloticus). Two groups were established: the memory group, containing fish previously immunized with a 2,5% sheep anti-red cell, to generate the immune memory; and the naive group, containing fish that received a 0,65% saline solution. After 32 days, both groups were subjected to a new dose of the same antigen at the same concentration, volume, and inoculation via. The memory clones reactivation was correlated to the increase of the IgM positive cells in the spleen in the memory group at 0 day. The memory group showed an increase in the absolute number of lymphocytes at 21 days and an increase in the antibodies at 14 days after inoculation when compared to the naive group. The results suggest that the spleen may be a storage and reactivation place of memory B cells in Nile tilapia.(AU)


Subject(s)
Animals , Immunoglobulin M/analysis , Cichlids/immunology , Cichlids/blood , Antibody Formation , Immunoglobulins/administration & dosage
2.
Arq. bras. med. vet. zootec. (Online) ; 70(5): 1565-1568, set.-out. 2018. ilus
Article in English | LILACS, VETINDEX | ID: biblio-947401

ABSTRACT

Skeletal deformities are frequent problems in cultured fish populations due mainly to unfavorable abiotic conditions, inappropriate nutrition, and genetic factors. These may cause erratic swimming, decrease of conversion rate, growth, and market value. The aim of this case report was to present the occurrence of deformities in juvenile cobia and groupers from an offshore marine farm in Ilhabela, São Paulo, Brazil. Nine cobias and seven juvenile groupers, that presented deformities, were euthanized and fixed in 10% formaldehyde. They were tagged, processed, and stained with "Alcian Blue" (AB) and "Alizarin Red-S" (ARS) for visualization of cartilage and bone tissue, respectively. After evisceration, radiographic examination was performed. The deformities observed in cobia were atrophy of the operculum, disorganization of the gill lamellae, deformity of the lower jaw, kyphosis, and scoliosis. Groupers presented lower jaw deformity and saddleback syndrome. The farm studied in this case report had poor management standards, fed commercial feed for freshwater herbivorous fish and cooked sardines, high inbreeding and absence of adequately trained professionals to manage these species. The sum of these factors must have directly influenced the appearance of these deformities. It is necessary to control this situation to minimize the incidence of malformations that have economic impacts to farmers.(AU)


As deformidades esqueléticas são problemas frequentes em populações de peixes cultivados devido, principalmente, a condições abióticas desfavoráveis, nutrição inapropriada e fatores genéticos. Estas podem causar natação errática, diminuição do índice de conversão, do crescimento e do valor no mercado. O objetivo deste relato de caso foi apresentar a ocorrência de deformidades em cobias e garoupas juvenis provenientes de uma fazenda marinha em sistema offshore, em Ilhabela, São Paulo, Brasil. Nove cobias e sete garoupas juvenis, que apresentavam deformidades, foram sujeitos à eutanásia e fixados em formol a 10%. Os espécimes foram registrados, processados e corados com "Alcian Blue" (AB) e "Alizarin Red-S" (ARS) para visualização de tecido cartilaginoso e ósseo, respectivamente. Os peixes foram eviscerados para o exame radiográfico. As deformidades observadas em cobia foram: atrofia do opérculo, desorganização das lamelas branquiais, deformidade do maxilar inferior, cifose e escoliose. As garoupas apresentaram deformidade do maxilar inferior e síndrome de Saddleback. Os peixes deste relato de caso estiveram sob manejo deficiente, alimentados com ração comercial para peixes herbívoros de água doce e sardinhas cozinhadas, alta consanguinidade e ausência de profissionais adequadamente treinados para o manejo dessas espécies. A soma desses fatores influenciou diretamente na aparição dessas deformidades, precisando ser controlados para minimizar a incidência de malformações que tenham impacto econômico para os produtores.(AU)


Subject(s)
Animals , Kyphosis/veterinary , Perciformes/abnormalities , Fisheries
3.
Arq. bras. med. vet. zootec ; 68(2): 379-386, mar.-abr. 2016. graf
Article in Portuguese | LILACS | ID: lil-779794

ABSTRACT

A bactéria Streptococcus agalactiae é um potente agente causador de surtos por doenças bacterianas em peixes. O estresse provocado pelo manejo zootécnico e pela má qualidade ambiental torna a tilápia susceptível às infecções por essa bactéria. O objetivo do presente trabalho foi avaliar a resistência de tilápias-do-nilo imunizadas com soro hiperimune anti-S. agalactiae, posteriormente desafiadas com cepa homóloga da mesma bactéria. Após determinação da DL 50 de S. agalactiae, 36 tilápias foram distribuídas em quatro aquários, dois para o grupo controle e dois para inoculação celomática para produção de anticorpos anti-S. agalactiae. No 21° e 28° dias, foi coletado sangue para obtenção de soro hiperimune utilizado na transferência passiva. Em seguida, 30 tilápias foram distribuídas em três aquários e submetidas a três tratamentos: GI: controle; GII: imunizadas com o soro inativado; GIII: imunizadas com soro ativo...


The Streptococcus agalactiae bacteria is a potent agent which causes outbreaks of bacterial diseases in fish. The stress caused by management and poor environmental quality makes tilapia susceptible to infections, including by bacterium. The aim of this study was to evaluate the resistance of the Nile tilapia immunized with hyperimmune serum against S. agalactiae subsequently challenged with homologous strain of the same bacteria. After determining the DL 50 of S. agalactiae, 36 tilapias were distributed in 4 aquariums, 2 for the control group and 2 for the group via coelomic, inoculated with the DL 50 for anti-S. agalactiae antibodies production. On the 21st and 28th day blood was collected for the obtainment of hiperimmune serum used in passive transference. Then, 30 tilapias were distributed in 3 aquariums submitted to 3 treatments (GI: control; GII: immunized with inactivated-serum; GIII: immunized with non-inactivated serum)...


Subject(s)
Animals , Cichlids , Fishes , Bacterial Infections/veterinary , Streptococcus agalactiae/pathogenicity , Disease Outbreaks/veterinary , Antibodies/analysis , Bacterial Infections , Immunization, Passive/veterinary , Immunoglobulins/analysis
4.
Arq. bras. med. vet. zootec ; 61(4): 785-790, ago. 2009. ilus, tab
Article in English | LILACS | ID: lil-524431

ABSTRACT

IgG and IgM deposits in kidneys of dogs with visceral leishmaniasis (VL) were studied in 25 symptomatic dogs (case) and 15 asymptomatic dogs (control) by an immunohistochemical method. All tested dogs were positive for VL by polymerase chain reaction, enzyme-linked immunosorbent assay, and indirect immunofluorescence test. Kidney fragments were submitted to immunohistochemical reaction. Many morphological patterns of distribution of subendothelial granules were identified for IgG and IgM in glomerular capillaries: global, segmental, diffuse, or focal. Intensity of immunohistochemical reaction to IgG was not significantly different when comparing the symptomatic and the asymptomatic animal groups by Fisher's exact test. IgM reactions were significantly different between groups (P<0.01). Deposits of IgM on mesangial cells and in inflammatory interstitial infiltrate were rarely seen, although IgG reactions were frequent at these sites. This study concluded that immunohistochemical reactions for IgM were more intense than those observed for IgG in canine VL, and these reactions were characterized by distribution of subendothelial granules in glomerular capillaries.


Caracterizou-se a deposição de IgG e IgM em rins de cães com leishmaniose visceral (LV) pelo uso da técnica imunoistoquímica. Foram estudados rins de 25 cães sintomáticos (caso) e de 15 cães assintomáticos (controle). Todos os animais foram positivos para leishmaniose pela reação em cadeia da polimerase, pelo ELISA e pela imunofluorescência indireta. Fragmentos renais foram submetidos à reação imunoistoquímica. Diversos padrões morfológicos de distribuição de grânulos subendoteliais de IgG e IgM foram identificados nos capilares glomerulares: global, segmentar, difuso ou focal. A intensidade da reação imunoistoquímica da IgG, medida pelo teste exato de Fisher não diferiu entre os grupos sintomáticos e assintomáticos e a intensidade de reação da IgM foi diferente entre os grupos (P<0,01). Depósitos de IgM nas células mesangiais e no infiltrado inflamatório raramente foram visualizados, no entanto as reações IgG foram freqüentemente visualizadas nesses locais. Concluiu-se que as reações de IgM foram mais intensas que as reações de IgG na LV canina e caracterizam-se pela distribuição de grânulos subendoteliais nos capilares glomerulares.

5.
Arq. bras. med. vet. zootec ; 60(6): 1358-1366, dez. 2008. tab
Article in Portuguese | LILACS | ID: lil-506544

ABSTRACT

Avaliou-se a eficiência da infusão intravenosa de heparina sódica (100UI/kg/8h, a partir de 24h após o fornecimento de carboidrato, até completar 48h) no controle da laminite eqüina experimentalmente induzida por sobrecarga de carboidrato (17,6g de amido de milho/kg de peso corpóreo). Foram utilizados 15 eqüinos adultos, distribuídos em três grupos experimentais: GI (grupo-controle); GII (grupo laminite) e GIII (grupo laminite+heparina). Posteriormente ao fornecimento de carboidrato, os animais foram submetidos a exames físicos e laboratoriais durante um período de 48 horas. Ao final do experimento, os animais foram submetidos à eutanásia pela aplicação intravenosa de 5ml de maleato de acepromazina seguida de 1g de tiopental sódico e 1 litro de solução saturada de KCl para a obtenção de amostras de tecidos dos cascos, necessárias ao exame histológico. Os animais de GII e GIII, submetidos à sobrecarga de carboidratos, desenvolveram laminite, exibindo claudicação 12 e 24h após o fornecimento de carboidrato, respectivamente, bem como aumentos da freqüência cardíaca e do tempo de preenchimento capilar. As alterações histológicas, semelhantes em GII e GIII, eram do tipo degenerativo, como adelgaçamento de lâminas epidérmicas, retração, achatamento e deslocamento de lâminas dérmicas, vacuolização epidérmica e desorganização do tecido epidérmico. A infusão da heparina sódica não preveniu ou atenuou a degeneração laminar.


The efficacy of intravenous heparin administration (100UI/kg/8h, from 24 to 48h after carbohydrate administration) in the control of carbohydrate overload-induced equine laminitis (17.6g of corn starch/kg live weight) was evaluated. Fifteen horses were allocated into three experimental groups: GI (control group), GII (laminitis group), and GIII (laminitis+heparin group). These animals were submitted to physical and laboratorial examination during 48h. After that time, they were euthanized with intravenous administration of 5ml of acepromazine followed by 1g of thiopental sodium and 1 liter of saturated solution of KCl to obtain hoof tissues samples for histological examination. GII and GIII horses developed laminitis, showing lameness 12 and 24h after carbohydrate administration, respectively, as well increased heart rate and capillary refill time. The histological alterations, similar in GII and GIII, were degenerative lesions, as thinness of epidermal lamina, retraction, flattening and dislocation of the dermal lamina, epidermal vacuolization, and disruption of the epidermal tissues. The occurrence of laminar degeneration was not prevented or attenuated with intravenous heparin administration.


Subject(s)
Animals , Male , Female , Adult , Carbohydrates/administration & dosage , Hoof and Claw/anatomy & histology , Foot Diseases/chemically induced , Foot Diseases/veterinary , Horses , Heparin/administration & dosage , Heparin/adverse effects , Infusions, Intravenous/methods , Infusions, Intravenous/veterinary
6.
Arq. bras. med. vet. zootec ; 58(5): 781-787, out. 2006. ilus, graf
Article in Portuguese | LILACS | ID: lil-441526

ABSTRACT

Alterações morfológicas de 11 casos de cães com insuficiência renal foram caracterizadas e classificadas de acordo com os padrões estabelecidos pela Organização Mundial de Saúde para seres humanos. Glomerulonefrite esclerosante difusa foi diagnosticada em 82,0 por cento dos animais e nefrite intersticial crônica nos 18,0 por cento restantes. Os tipos e freqüência das lesões identificadas foram similares às encontradas na literatura para a insuficiência renal crônica.


Morphologic alterations of 11 cases of dogs with renal failure were characterized and classified according to the patterns established by the World Health Organization for human beings. Diffuse sclerosing glomerulonephritis was diagnosed in 82.0 percent of the animals and chronic interstitial nephritis in the remaining 18.0 percent. The types and frequencies of lesions were similar to the those noticed in the literature for chronic renal failure.


Subject(s)
Animals , Male , Female , Dogs , Glomerulonephritis/classification , Glomerulonephritis/diagnosis , Renal Insufficiency, Chronic/classification , Renal Insufficiency, Chronic/diagnosis , Renal Insufficiency, Chronic/veterinary , Nephritis, Interstitial/classification , Nephritis, Interstitial/diagnosis
7.
J. venom. anim. toxins incl. trop. dis ; 11(4): 433-446, out.-dez. 2005. ilus
Article in English | LILACS | ID: lil-417718

ABSTRACT

The aim of this study was to evaluate the effect of snake venom derived fibrin glue on the healing of the deep digital flexor tendon, during three periods. The tendon of the 2nd digit of 30 thoracic limbs of dogs was partially sectioned for glue application. Biopsies were performed 7, 15, and 30 days post surgery for the clinical and morphological study of tendons. Analysis of the results showed that 73.3% of the tendons showed stump retraction and 16.6% moderate to excessive adherence, which affected sliding. There was a significant difference in the number of inflammatory cells among the three studied periods, being the highest on day 15. The morphological analysis revealed a typical tendon healing process with a lower level of inflammation in the acute phase, facilitating the cicatricial maturation phase. Snake venom derived fibrin glue promotes the healing in dog flexor tendon


Subject(s)
Animals , Dogs , Fibrin Tissue Adhesive/therapeutic use , Dogs , Snake Venoms
8.
J. venom. anim. toxins incl. trop. dis ; 11(4): 532-539, out.-dez. 2005. ilus, tab
Article in English | LILACS | ID: lil-417724

ABSTRACT

In human and canine renal histological studies of visceral leishmaniasis (VL), the etiological agent is rarely found in situ. The objective of this study was to evaluate PCR in identifying the etiological agent in spleen, liver, lymph node, and kidneys of VL-seropositive dogs. Twenty-five symptomatic (case group) and 15 asymptomatic (control group) VL-seropositive dogs of different breeds, sexes, and ages from Teresina, Piauí State, Brazil, were used. Serologic diagnosis was made by enzyme-linked immunosorbent assay and indirect immunofluorescence test. Animals were subjected to euthanasia and necropsy. Renal fragments were immersed in buffered formaldehyde solution. Spleen, liver, lymph node, and kidney samples were collected and frozen at -70ºC until DNA extraction. After dehydration and diaphanization, renal fragments were infiltrated and embedded in paraffin, cut at 3 mm, and stained with hematoxylin-eosin (HE). DNA amplification used an automatic thermocycler with specific Leishmania primers. All case-group dogs and 2 controls showed positive results in spleen, liver, or lymph node PCRs. There was a significant difference by Fisher exact test. In symptomatic seropositive dogs, renal histopathological evaluation showed one animal (4%) with amastigote forms of Leishmania in inflammatory infiltrate, and kidney PCRs detected Leishmania DNA in eight animals (32%). The conclusion was that PCR is more precise than the conventional histopathology in detecting the Leishmania parasite in kidney


Subject(s)
Animals , Male , Female , Dogs , Dogs , Leishmania , Polymerase Chain Reaction/methods , Kidney
9.
J. venom. anim. toxins incl. trop. dis ; 11(4): 579-593, out.-dez. 2005. ilus, tab
Article in English | LILACS | ID: lil-417727

ABSTRACT

Visceral leishmaniasis (VL) is a zoonosis that affects both animals and man. Dogs are the etiological agent’s main reservoir. The aim of this study was to evaluate the clinical laboratory aspects and renal histopathology of VL dogs. Thirty-four symptomatic (case) and 17 asymptomatic (control) VL seropositive dogs of different breeds, sexes, and ages from Teresina, Piauí State, Brazil, were used. Diagnosis was confirmed by enzyme-linked immunosorbent assay and indirect immunofluorescence test. Clinical and laboratory tests included blood cell count and renal function analysis (urea and creatinine). Animals were subjected to euthanasia and necropsy. Renal fragments were prepared by the usual histological techniques and stained with hematoxylin-eosin and periodic acid-Schiff. Physical examination showed that lymph node hypertrophy (85.29%) and skin lesions (35.29%) were frequent in the case group. Anemia was found in 55.88% of the case and in 11.76% of the control group. There was a significant difference between groups by Fisher’s exact test. Two case-group dogs showed azotemia. Renal histopathological evaluation showed that 61.76% case and 17.65% control-group dogs had membranoproliferative glomerulonephritis. Mesangial proliferative glomerulonephritis was seen in 32.35% case and 64.70% control-group animals. There was a significant difference for both types of glomerulonephritis between groups. Amastigote forms of Leishmania were found in the renal parenchyma, in the inflammatory infiltrate of one case-group dog. We concluded that, in canine VL, regardless of the clinical signs at physical examination, the kidneys are frequently compromised


Subject(s)
Animals , Dogs , Dogs , Leishmaniasis, Visceral/complications , Kidney/physiopathology , Kidney/injuries
10.
J. venom. anim. toxins incl. trop. dis ; 11(3): 261-274, jul.-set. 2005. graf
Article in English | LILACS | ID: lil-414925

ABSTRACT

The aim of this study was to evaluate the effect of snake venom derived fibrin glue on the strength of tendon healing in dogs. The deep digital flexor tendon of the 5th digit of 24 thoracic limbs was partially sectioned for adhesive application. On the 7th, 15th, and 30th postoperative day tendons segments were removed for the clinical and biomechanical study. Results indicated that 62.5% of the tendons showed stump retraction and 20.8% moderate to excessive adherence, which affected gliding. The biomechanical evaluation showed that, over time, tendon healing gained progressive resistance for maximum traction and permanent deformations with satisfactory results on the 15th day for rigidity and resilience compared to the other two studied periods. Snake venom derived fibrin glue promotes healing in dog flexor tendon


Subject(s)
Animals , Dogs , Fibrin Tissue Adhesive/therapeutic use , Dogs , Snake Venoms , Tendons , Biomechanical Phenomena
11.
J. venom. anim. toxins incl. trop. dis ; 11(2): 129-142, May-Aug. 2005. graf
Article in English | LILACS | ID: lil-402361

ABSTRACT

Healing is a complex process with many interfering factors. The objective of this work was to evaluate regeneration strenght of non-pregnant adult dog uterus when snake venom derived fibrin adhesive is used to reinforce hysterorrhaphy. Maximum limit and rigidity were analyzed. Twenty uterine horns from 10 dogs were hysterotomized and distributed into 2 groups. Hysterorrhaphy was performed using the Shimieden-Cushing double layer suture. In one group, animals received snake venom derived fibirn adhesive as reinforcement. Although neither variable was significantly different, our results showed higher rigidity values in the adhesive group. This can be attributed to the adhesive's effect on organ elasticity or to more granulation tissue formed in the uterine scar


Subject(s)
Animals , Female , Dogs , Fibrin Tissue Adhesive/therapeutic use , Wound Healing , Hysterectomy/veterinary , Snake Venoms , Biomechanical Phenomena
12.
Arq. bras. med. vet. zootec ; 56(6): 701-708, dez. 2004. ilus
Article in English | LILACS | ID: lil-394414

ABSTRACT

Estudou-se o efeito de aplicações intratendíneas do polissulfato de glicosaminoglicanas (PSGAG) no tratamento de tendinite induzida pela colagenase. Dois grupos (GI e GII) de cinco eqüinos da raça Puro-Sangue Arabe, machos e fêmeas, com idades entre dois e seis anos, foram submetidos à tendinite do tendão flexor digital superficial do membro torácico esquerdo por aplicação intratendínea de 1,0ml de colagenase (2,5mg/ml). Decorridos sete dias da indução da lesão, os eqüinos do GI receberam cinco aplicações intralesionais de 1,0ml (125mg) de PSGAG, a intervalos de quatro dias, enquanto que os do GII receberam aplicações de solução fisiológica em igual volume e freqüência. Efetuaram-se avaliações clínicas e ultra-sonográficas, periodicamente, durante 150 dias. Todos os animais apresentaram claudicação e aumento local de sensibilidade, de temperatura e de volume 24 horas após a indução da lesão. Com exceção do aumento de volume, que permaneceu visível até o final do experimento, observou-se regressão de todos os sinais em todos os animais. A avaliação ultra-sonográfica evidenciou lesões de tamanho, forma e posição variados, de maior severidade entre o sétimo e 23º dia. Ao término do experimento, o grau de ecogenicidade encontrava-se entre 1 e 2, e o grau de paralelismo entre 0 e 2. A análise histopatológica evidenciou áreas cicatriciais com intensa fibroplasia e neovascularização, fibras colágenas pouco organizadas e endotendão hipercelular e espessado. Não se observou diferenças significativas entre os grupos quanto ao processo de reparação das lesões, concluindo-se que a aplicação intralesional de PSGAG não produziu efeito benéfico para tratar tendinite induzida por colagenase.


Subject(s)
Animals , Male , Female , Glycosaminoglycans , Horses , Injections, Intralesional , Tendinopathy
13.
J. venom. anim. toxins incl. trop. dis ; 10(2): 133-143, 2004. ilus
Article in English | LILACS | ID: lil-363346

ABSTRACT

This study evaluated the use of fibrin glue derived from snake venom in the healing process after canine histerorrhaphy. Three groups of four animals were submitted to uterine hysterotomy followed by wound closure. In Group 1, double-layer suture was used, the first with Schimieden pattern, the second with Cushing pattern; in Group 2, only fibrin glue; and in Group 3, the same as for Group 1 but with fibrin glue as suture reinforcement. Results indicated that fibrin glue produced less inflammation in the exudative phase, and exacerbated deposition of connective tissue and angiogenesis in the proliferative and maturation phases of the healing process, favoring its evolution.


Subject(s)
Animals , Female , Dogs , Dogs , Fibrin Tissue Adhesive , Uterus , Crotalid Venoms/therapeutic use
14.
Braz. j. biol ; 61(4): 639-644, Nov. 2001. ilus, tab
Article in English | LILACS | ID: lil-308293

ABSTRACT

The Aquaculture Center of Unesp, Jaboticabal, SP, Brazil, received fishes for diagnosis from fish farmers reporting fish crowding at pond edges and in water inlets. Fifty-three out of 194 cases showed round to oval, immobile whitish structures, measuring up to 162 mm diameter, identified as the dinoflagellate Piscinoodinium pillulare. In 34 diagnosed cases the parasites were present in the gills, in 2 on body surface, and 9 in both. Thirty-one out of 53 were tambacu hybrids hosts; 7, Piaractus mesopotamicus; 6, Colossoma macropomum; 5, Leporinus macrocephalus; 3, Oreochromis niloticus; and 1, Prochilodus lineatus. Fish showed increased mucous production on body surface and gills, while ecchymosis in the caudal peduncle and operculum was present. The gills also showed paleness, congestion, and petechiae. Histopathology presented a great number of trophonts situated between secondary lamellae, fixed to or detached from the epithelium. Primary lamellae presented interstitial hemorrhages, severe hyperplasia of the epithelium, goblet cells, and mononuclear infiltrates. The present work is the first report of P. pillulare in Brazil and emphasizes the importance of this dinoflagellate which caused significant economic losses from 1995 through 1997


Subject(s)
Animals , Male , Female , Dinoflagellida , Fish Diseases , Fishes , Fresh Water , Protozoan Infections , Brazil
15.
Rev. bras. biol ; 59(3): 527-534, Aug. 1999.
Article in English | LILACS | ID: lil-320820

ABSTRACT

Piauçus (Leporinus macrocephalus), were raised in 300 m2 ponds (density of 10 fish/m2) presenting asphyxia signals and daily mortality of 27 fishes. Specimens with 8-cm total body length, were collected for necropsy. Mucus of body surface and pieces of organs were collected and examined microscopically, in wet mounts, stained or in histological sections. The smears examination showed the presence of several spores in the secondary lamellae of the gill filaments, identified as Henneguya leporinicola n.sp (Myxozoa: Myxobolidae). Histopathological study showed epithelial hyperplasia and fulfilling of the spaces between the secondary lamellae, congestion and telangiectasia sinusoidal. It was also observed hyperplasia of the goblet cells and several cysts of parasite with 70.3 microns diameter. Such cysts were situated among the secondary lamellae, covered or not by the hyperplasic epithelium. With this diagnostic, three applications of formalin solution 10 ml/m3 were carried out. Fifteen days after that, fish were examined again to ascertain whether the treatment was efficient on disease caused by the protozoa. The tissue alterations present in the gills after the treatment were just a moderate sinusoidal congestion and a slight epithelial hyperplasia on the base of the secondary lamellae.


Subject(s)
Animals , Fish Diseases/parasitology , Eukaryota , Gills , Protozoan Infections, Animal/parasitology , Antiprotozoal Agents , Brazil , Fish Diseases/drug therapy , Fish Diseases/pathology , Eukaryota , Fisheries , Formaldehyde/administration & dosage , Gills , Protozoan Infections, Animal/drug therapy , Protozoan Infections, Animal/pathology , Host-Parasite Interactions , Spores , Time Factors
16.
Braz. j. vet. res. anim. sci ; 35(6): 243-5, 1998. tab, graf
Article in Portuguese | LILACS | ID: lil-266040

ABSTRACT

Investigou-se o efeito do succinato de cloranfenicol (30 mg/kg, a cada 12 h, durante 4 dias, IP) sobre o acúmulo de leucócitos polimorfonucleares (PMN) na pleurisia induzida pela carragenina (150 mg) em ratos (Wistar, machos, 180-230 g, n = 12) diabéticos (40 mg/kg de aloxana, IV). O antibiótico produziu aumento de 36 por cento no número de PMN (p<0,05) migrados para a cavidade pleural de animais normais. O estado diabético provocou reduçäo de 45 por cento dos PMN (p<0,05) acumulados no exsudato pleural de animais näo tratados com o antibiótico. Por outro lado, animais diabéticos tratados com succinato de cloranfenicol apresentaram resposta de PMN que näo diferiu estatisticamente do observado em animais controle, nao tratados. A contagern total e diferencial dos leucócitos circulantes realizada antes e 4 h depois da aplicaçäo da carragenina näo diferiu estatisticamente entre os grupos


Subject(s)
Animals , Male , Chloramphenicol , Diabetes Mellitus , Neutrophils , Pleurisy
17.
Braz. j. vet. res. anim. sci ; 33(3): 144-8, 1996. ilus
Article in English | LILACS | ID: lil-246023

ABSTRACT

Camundongos Swiss, fêmeas, (25-30 g; n = 100) receberam 4 injeçöes de bussulfano (20 mg/kg, ip) a intervalos de 15 dias (n = 100). Antes do tratamento e após 30, 60 e 90 dias, os animais deste e de um grupo controle (n = 15) foram avaliados quanto ao leucograma, taxa de hemoglobina e hematócrito por meio do sangue colhido por punçäo retroorbital. Sessenta dias após o início do tratamento, 60 animais sobreviventes do grupo tratado e 15 animais do grupo controle receberam implantes intermusculares de matriz óssea desmineralizada (MOD-10 mg). No 90§ dia (30 dias após o implante) foram sacrificados para exame histológico da medula óssea esternal (MOE) e da resposta osteomielogênica ao implante de MOD. Trinta dias após o início do tratamento observou-se leucopenia, com diminuiçäo do número de granulócitos, linfócitos e monócitos nos animais que receberam bussulfano. O hematócrito e a taxa de hemoglobina apresentaram-se diminuídos no 60§ dia. O exame histológico da MOE do grupo tratado revelou hipocelularidade, dilataçäo dos capilares sinusóides e reduçäo do número de megacariócitos (50 por cento). Os animais controle apresentaram 100 por cento de resposta positiva ao implante de MOD, havendo formaçäo de placas metaplásicas compostas por trabéculas ósseas contendo cavitaçöes preenchidas por células hematopoiéticas. Em 46,7 por cento dos animais tratados observou-se resposta osteomielogênica semelhante à do grupo controle, mas com hipocelularidade e maior componente de adipócitos; 25 por cento apresentaram resposta osteomielogênica tardia e incompleta com menor componente ósseo, maior componente cartilaginoso e ausência de células hematopoiéticas; nos 28,3 por cento restantes a resposta foi negativa


Subject(s)
Animals , Female , Bone Demineralization, Pathologic , Busulfan/therapeutic use , Mice/injuries
18.
Braz. j. vet. res. anim. sci ; 33(1): 11-4, 1996. ilus
Article in Portuguese | LILACS | ID: lil-257061

ABSTRACT

Neste trabalho estudaram-se os efeitos da indometacina e dexametasona sobre a migraçäo das células polimorfonucleares (PMN), produzida pelo cloranfenicol 4h após a aplicaçäo intrapleural de carragenina ou dextrano. Demonstrou-se que o pré-tratamento de ratos com cloranfenicol (30mg/kg, ip, a cada 12h, por 4 dias) potenciou a migraçäo de PMN para a cavidade inflamada, quando a carragenina (150mg) foi utilizada como estímulo inflamatório, enquanto a resposta ao dextrano (100mcg) näo se alterou, em comparaçäo com animais näo tratados com o antibiótico. Ratos que receberam cloranfenicol e foram tratados com indometacina (2,0mg/kg, per os, 30 min antes da aplicaçäo de carragenina) ou dexametasona (0,25mg/kg, ip, 30 min antes da aplicaçäo de carragenina) apresentaram inibiçäo das respostas celulares potenciadas. O mecanismo pelo qual o cloranfenicol produz aumento da resposta inflamatória permanece obscuro


Subject(s)
Carrageenan , Chloramphenicol , Dexamethasone/administration & dosage , Indomethacin/administration & dosage , Pleurisy/therapy , Succinates
19.
Braz. j. vet. res. anim. sci ; 33(2): 102-6, 1996. ilus
Article in Portuguese | LILACS | ID: lil-257077

ABSTRACT

Neste trabalho, avaliou-se a evoluçäo cicatricial de feridas provocadas experimentalmente em papilas mamárias de 16 vacas näo lactentes, através do emprego de uma membrana biológica que substitui temporariamente a pele, comparando-a com tratamento à base de pomada epitelizante. Em cada animal, a membrana foi colocada na ferida da papila mamária anterior direita e o tratamento com pomada foi realizado na papila mamária posterior direita. Foram feitas observaçöes clínicas e análise histológica no 3§, 7§, 14§ e 28§ dias do pós-operatório. Das observaçöes realizadas, verificou-se que as papilas tratadas com a membrana biológica cicatrizaram com uma semana de antecedência, quando comparadas às controle (pomada epitelizante). A utilizaçäo da membrana biológica, permitiu ainda uma reduçäo na freqüência de curativos


Subject(s)
Animals , Female , Cattle , Wound Healing , Mammary Glands, Animal , Membranes, Artificial
20.
Braz. j. vet. res. anim. sci ; 32(4): 246-50, 1995. tab
Article in English | LILACS | ID: lil-240109

ABSTRACT

Nove éguas prenhes foram inoculadas, via oral, com oocistos esporulados de T. gondii. Três éguas prenhes, näo infectadas, foram mantidas como testemunhas. O T. gondii foi encontrado na placenta, retina, esôfago, fígado, diafragma, cérebro, medula espinhal, músculo esquelético, coraçäo, pulmäo e língua de potros nascidos de éguas inoculadas. A obtençäo e T. gondi em diferentes tecidos, desses potros reforça a hipótese da transmissäo transplacentária deste protozoário em equinos


Subject(s)
Animals , Female , Pregnancy , Horses , Pregnancy, Animal , Toxoplasmosis, Animal
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