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1.
Acta Trop ; 222: 106037, 2021 Oct.
Article in English | MEDLINE | ID: mdl-34224716

ABSTRACT

Bartonella henselae is the causative agent for the infectious disease Cat Scratch Disease (CSD), which can be fatal. Domestic and wild felines are known to be its main mammal reservoirs. The present study aimed to investigate the occurrence and genetic diversity of Bartonella spp. in cats sampled in São Paulo (SP) and Minas Gerais (MG) States, Southeastern Brazil. Based on a quantitative real-time PCR (qPCR) assay, a Bartonella sp. nuoG gene fragment was detected in 39.9% (122/306) of the blood samples (46/151 cats of SP; 76/155 cats of MG). The blood samples were submitted to a pre-enrichment culture technique that allowed the detection of 12 additional positive samples, which showed to be negative in the qPCR using DNA blood samples as templates. Furthermore, five B. henselae isolates were obtained from qPCR-negative samples for both blood and pre-enrichment culture. Seven out of 24 Ctenocephalides felis fleas were positive for Bartonella spp. in the qPCR assay; 4/7 positive fleas were collected from Bartonella-negative cats. Twenty-three rpoB B. henselae cloned sequences were obtained from nine cats' blood samples, showing the occurrence of 13 different genotypes. Median-joining network and SplitsTree distance analysis showed that the obtained sequences represented distinct B. henselae genotypes when compared to those previously deposited in GenBank. Intra-host diversity was found, since different rpoB genotypes of B. henselae were detected in individual single cats. Bartonella henselae isolates showed two allelic profiles (ST37 in cats from MG state and ST9 in SP state) by MLST (Multilocus Sequence Typing) based on sequencing of eight molecular markers. The present study is the first molecular report of Bartonella sp. in cats from Minas Gerais State. In summary, this body of work showed the occurrence of different B. henselae rpoB genotypes at an intra-reservoir host level. Based on qPCR from blood samples and pre-enrichment liquid culture and isolation, occurrence of 33.1% (50/151) and 56.8% (88/155) for Bartonella sp. was found in cats from SP and MG states, respectively. Two different allelic profiles of B. henselae were found in cats from the states of São Paulo (ST9) and Minas Gerais (ST37), suggesting a clonal evolution of Bartonellae in a certain geographical region.


Subject(s)
Bartonella Infections , Bartonella henselae , Cat Diseases , Animals , Bartonella Infections/epidemiology , Bartonella Infections/veterinary , Bartonella henselae/classification , Bartonella henselae/genetics , Brazil/epidemiology , Cat Diseases/epidemiology , Cat Diseases/microbiology , Cat-Scratch Disease , Cats , DNA, Bacterial/genetics , Genetic Variation , Multilocus Sequence Typing
2.
Clin Implant Dent Relat Res ; 20(2): 222-228, 2018 Apr.
Article in English | MEDLINE | ID: mdl-29318773

ABSTRACT

BACKGROUND: Despite the wide use of dental implants they can bring inconveniences, as the moment one reaches osseointegration, these can no longer be extended. Therefore, if a problem occurs regarding its positioning, the options open are substitution or burial of the implant. With implant substitution, there exists the risk of local bone loss and/or future loss of the new implant. PURPOSE: This study proposes a new device (implant extender) for extending the dental implant. The feasibility of this technique is verified through installing dental implant extensions onto the humerus bone of dogs with autogenous bone grafts. MATERIALS AND METHODS: Implants of 3.3 mm in diameter by 6 mm in length and implant extensions with a 3.3 mm diameter and 2.2 mm length were installed onto humerus of 4 healthy dogs, using an autogenous bone graft in a block made from ilium. The biomechanical percussion tests were performed on the implant extensions and then the implant-extension sets were removed for radiographic analysis. RESULTS: In the biomechanical percussion, none of the extensions present clinical mobility. As for the x-rays, these were analyzed by 20 professionals, who concluded that there was a 100% success rate with bone formation around the implants, 74.1% for bone neoformation of the implant extensions, and 80.1% referring to the adaptation of the implant extension. DISCUSSION AND CONCLUSION: Bone formation occurred in every installed dental implant. In most cases, there occurred bone neoformation of the extensions and adaptation of the extension/implant set, according to the x-ray analysis performed by the evaluators. An absence of clinical mobility in the extensions was also observed. Although the results were promising, these techniques still need to be researched in humans, as an alternative for reducing elongated prosthetic crowns or poorly installed implants, as well as the modification of the type of implants among other applications.


Subject(s)
Bone Transplantation , Dental Implants , Dental Prosthesis Design , Osseointegration , Animals , Autografts , Dental Implantation, Endosseous , Dogs , Humerus/diagnostic imaging , Ilium/transplantation , Models, Animal , Radiography
3.
Biosci. j. (Online) ; 31(2): 555-562, mar./abr. 2015.
Article in Portuguese | LILACS | ID: biblio-964112

ABSTRACT

Com objetivo de estabelecer valores de referência para a citologia endometrial e avaliar histologicamente o endométrio de gatas clinicamente saudáveis e sem patologias uterinas, foram coletados 22 úteros de gatas que passaram por ovariohisterectomia eletiva. Após avaliação macroscópica dos úteros, coletou-se mostra para citologia endometrial pela técnica de escova endometrial (cytobrush) e fragmento para avaliação histológica. Quanto à apresentação das glândulas endometriais, 31,8% (7/22) das gatas apresentaram lâmina própria com poucas camadas de glândulas tubulares simples, revestidas por epitélio simples cúbico ou cilíndrico baixo, com diâmetro reduzido e sem secreção no seu lúmen. Proliferação glandular com algumas glândulas apresentando conteúdo no lúmen foi observada em 36,4% (8/22) dos animais. Presença de intensa proliferação glandular com glândulas revestidas por epitélio simples pavimentoso, a maioria com atividade secretora, foi observada em 31,8% (7/22) das gatas, sendo que em cinco destas verificou-se aparência cística com pronunciada dilatação glandular. A citologia endometrial, na leitura de 200 células, obteve os seguintes resultados: neutrófilos (10,77 ± 7,51), eosinófilos (1,93 ± 2,67), basófilos (0), linfócitos (6,58 ± 8,49), macrófagos (0,79 ± 2,05) e células de descamação (79,93 ± 11,44). Concluiu-se que em gatas clinicamente saudáveis há maior proporção de leucócitos na citologia endometrial quando comparado com outras espécies, mesmo quando não se evidencia inflamação na avaliação histológica. A colheita de material para citologia endometrial pela técnica de cytobrush apresenta celularidade satisfatória e sem presença de debris celulares em gatas.


This study evaluated the endometrial cytology and histology of clinically healthy cats without any uterine alteration in an attempt to establish reference parameters in dogs. Uteri were collected from 22 cats submitted to elective ovariohysterectomy. All uteri were macroscopically evaluated, after which an endometrial sample was obtained for cytological analysis using the endometrial brush (cytobrush) technique and a tissue fragment routinely processed for histological evaluation. Histological evaluation revealed that the endometrial glands of some 31.8% (7/22) cats consisted of a lamina propria with few layers of simple tubular glands, lined by simple cubical epithelium, with reduced diameter and without luminal secretion. Glandular proliferation with luminal content was observed in 36.4% (8/22) of the animals evaluated. The presence of intense proliferation with glandular glands lined by squamous simple epithelium, most with secretory activity was observed in 31.8% (7/22) of cats; in five of these, there was pronounced cystic glandular dilatation. The endometrial cytology of 200 cells revealed the following results: neutrophils (10.77 ± 7.51), eosinophils (1.93 ± 2.67), basophils (0), lymphocytes (6.58 ± 8.49), monocytes (0.79 ± 2.05), and cell shedding (79.93 ± 11.44). It was concluded that clinically healthy cats have a greater percentage of leukocytes in endometrial cytology when compared with other species, even when there is no evidence of inflammation by histological evaluation. The collection of material for endometrial cytology using the cytobrush technique provides adequate cellularity and without the presence of cellular debris in cats.


Subject(s)
Cats , Uterus , Cats , Cell Biology , Endometrium , Histology
4.
J Oral Maxillofac Surg ; 72(1): 127.e1-9, 2014 Jan.
Article in English | MEDLINE | ID: mdl-24331566

ABSTRACT

PURPOSE: This study evaluated the healing process of teeth replanted after root treatment and intracanal dressing with indomethacin alone or indomethacin with calcium hydroxide (Ca[OH]2). MATERIALS AND METHODS: Through a case-control study, 24 teeth of 6 adult dogs were extracted, dried, and divided into 4 groups according to the root surface treatment protocols performed before replantation and the intracanal medication used after replantation. In group 1 (negative control), root surfaces were treated by immersion in a 0.9% saline solution and then replanted. In the other groups, the roots were immersed for 10 minutes in Ca(OH)2 (group 2), indomethacin (group 3), or a solution of indomethacin and Ca(OH)2 (group 4). After 2 weeks, group 1 teeth were subjected to single-visit root canal treatment and obturation with gutta-percha and sealer consisting of zinc oxide and eugenol. The teeth in the other groups were subjected to intracanal dressing with the same material used for immersion. After an additional period of 28 weeks, the animals were euthanized and the jaws containing the replanted teeth were processed for histologic analysis. Histometric values were statistically analyzed, with significance set at a P value less than or equal to .05. RESULTS: Group 1 exhibited significantly more normal periodontium than group 4 (P = .02). Total resorption was greater in group 4 than in group 1 (P = .02). No statistically significant difference in the percentage of surface resorption or in total inactive resorption was observed between the groups. CONCLUSIONS: The findings of this study suggest that intracanal dressing and topical root treatment with Ca(OH)2 with or without indomethacin is not recommended for teeth dried for 50 minutes, but the use of indomethacin alone as root surface treatment for delayed tooth replantation deserves further study using longer drying periods. In addition, the present results suggest that a single-visit root canal, performed up to 2 weeks after replantation, might be indicated for teeth dried for up to 50 minutes.


Subject(s)
Anti-Inflammatory Agents, Non-Steroidal/therapeutic use , Indomethacin/therapeutic use , Root Canal Irrigants/therapeutic use , Tooth Replantation/methods , Tooth Root/drug effects , Alveolar Process/pathology , Animals , Anti-Inflammatory Agents, Non-Steroidal/administration & dosage , Case-Control Studies , Dental Cementum/pathology , Desiccation , Dogs , Drug Combinations , Gutta-Percha/therapeutic use , Immersion , Indomethacin/administration & dosage , Periodontal Ligament/pathology , Random Allocation , Root Canal Filling Materials/therapeutic use , Root Canal Irrigants/administration & dosage , Root Canal Obturation/methods , Root Resorption/etiology , Sodium Chloride , Time Factors , Tooth Root/pathology , Wound Healing/drug effects , Zinc Oxide-Eugenol Cement/therapeutic use
5.
Acta cir. bras ; 16(4): 218-225, out.-dez. 2001. ilus
Article in Portuguese | LILACS | ID: lil-302554

ABSTRACT

O desenvolvimento da cirurgia video-laparoscópica trouxe a necessidade de tornar convencional a ligadura artérial com grampos de titânio para a diminuiçäo do tempo operatório. Com o objetivo de investigar e comparar a ligadura artérial com algodäo zero e com um, dois e três grampos de titânio, foram utilizadas 80 artérias de 20 cäes da espécie Canis Familiaris. De cada cäo, utilizaram-se as artérias axilares direita e esquerda e femorais direita e esquerda, que foram distribuídas em quatro grupos, mediante sorteio prévio e rodízio. Após a dissecçäo artérial e ligadura, as artérias foram submetidas a uma pressäo de 100 mmHg e de 300 mmHg, e a uma pulsaçäo de 70 batimentos por minuto, conseguida por meio de uma máquina simuladora da pressäo artérial. Houve extravasamento em três artérias, todas pertencentes ao grupo de ligadura com um grampo de titânio. Este extravasamento é estatisticamente significante e ocorreu em até 15 minutos após o início de funcionamento da máquina. Com os resultados, conclui-se que a ligadura artérial com um grampo de titânio tem maior probabilidade de extravasar do que a ligadura com dois ou três grampos de titânio, e a ligadura com fio de algodäo zero, em cäes. Näo há diferença entre a ligadura artérial com fio de algodäo e com dois ou três grampos de titânio, quando submetidas a pressäo de 300 mmHg e pulsação de 70 batimentos por minuto, em cäes.


Subject(s)
Animals , Male , Dogs , Axillary Artery/surgery , Femoral Artery/surgery , Gossypium , Titanium , Hemostatic Techniques , Laparoscopy , Ligation , Venous Pressure
6.
Acta cir. bras ; 11(4): 191-9, Oct/Dec. 1996. ilus, tab
Article in Portuguese | LILACS | ID: lil-186367

ABSTRACT

O objetivo foi comparar, em cäes, as anastomoses esôfago-gástricas por invaginaçäo com as feitas com o anel biofragmentável. Foram utilizados 40 cäes distribuídos em dois grupos de 20 animais: grupo I em que os animais foram submetidos à anastomose por invaginaçäo e grupo II em que os animais foram submetidos à anastomose com anel biofragmentável. Cada grupo de animais foi distribuído em dois subgrupos de dez animais de acordo com o dia do sacrifício: subgrupo A onde os animais foram sacrificados no 7§ dia pós-operatório e subgrupo B em que os animais foram sacrificados no 30§ dia pós-operatório. Em ambos os grupos, foram realizadas a avaliaçäo macroscópica e microscópica e análise estatística dos dados obtidos. Os resultados mostraram uma evoluçäo boa e regular na maioria dos animais, em ambos os grupos. Näo ocorreu fístula em nenhum dos animais do experimento e houve a mesma incidência de estenose em ambos os grupos. Houve maior captaçäo da túnica mucosa na área da anastomose nos animais do grupo I, quando comparados ao grupo II no 7§ dia pós-operatório. Sob o aspecto microscópico, näo houve nenhuma diferença significante entre os dois grupos. Os animais do grupo I apresentaram evoluçäo semelhante aos animais do grupo II no 7§ e 30§ dias pós-operatório, quando se compararam os dois tipos de anastomoses esôfago-gástrica: com anel biofragmentável e por invaginaçäo. Concluiu-se que a anastomose esôfago-gástrica com anel biofragmentável apresentou resultados semelhantes com as feitas por invaginaçäo.


Subject(s)
Animals , Male , Dogs , Biocompatible Materials , Esophagus/surgery , Stomach/surgery , Anastomosis, Surgical/methods , Postoperative Period , Time Factors
7.
Acta cir. bras ; 11(3): 108-15, jul.-set. 1996. ilus, graf
Article in Portuguese | LILACS | ID: lil-182623

ABSTRACT

O objetivo deste estudo foi avaliar o sistema circular desenvolvido por FONSECA e GOLDENBERG (1993) modificado com ventilador mecânico e pressao positiva internitente. Dez coelhos Nova Zelândia, machos adultos, foram anestesiados utilizando propofol (10 mg/Kg) para a intubaçao. Foi utilizado isoflurano em sistema fechado, com técnica de anestesia quantitativa com fluxos de borbulhamento pré calculados em intervalos duplos, administrados com vaporizador tipo Kettle. Nos períodos pré e zero, os animais apresentavam taquipnéia devido ao estresse. A queda na pressao arterial ocorreu por efeito dos agentes anestésicos. Os reflexos corneano e de retirada do estímulo doloroso estiveram ausentes no período de anestesia. Os animais, com exceçao da pressao parcial de oxigênio arterial elevada, devido a fraçao inspirada de oxigênio de 100 por cento, tiveram os valores gasométricos estáveis durante o estudo. A recuperaçao pós anestésica aconteceu de maneira suave, e em médica 20 minutos após a abertura do sistema, os animais estavam acordados. O sistema analisado foi adequado para anestesiar coelhos.


Subject(s)
Rabbits , Animals , Male , Anesthesia, Closed-Circuit , Anesthesia, Inhalation/methods , Isoflurane/administration & dosage , Propofol/administration & dosage
8.
Acta cir. bras ; 11(2): 82-104, Apr.-Jun. 1996. ilus, tab
Article in Portuguese | LILACS | ID: lil-177652

ABSTRACT

O objetivo deste trabalho de revisao foi orientar ao pesquisador nao habituado com técnicas anestésicas, a melhor forma de anestesiar o coelho para permitir um bom desenvolvimento de seu experimento. Atençao foi empreendida para a avaliaçao pré-anestésica, as limitaçoes para o uso do coelho em experimentaçao, particularidades e técnicas para a intubaçao orotraqueal, vias de administraçao dos agentes anestésicos, medicaçao pré-anestésica, monitorizaçao anestésica, agentes e técnicas para anestesia com agentes injetáveis e inalatórios, e alguns cuidados pós-anestesia que devem ser tomados.


Subject(s)
Animals , Rabbits , Anesthesia , Animals, Laboratory , Anesthetics/administration & dosage , Anesthesia, Inhalation , Body Temperature , Heart/physiology , Eye Movements , Intubation, Intratracheal , Monitoring, Physiologic , Physical Stimulation , Preanesthetic Medication , Preoperative Care , Reflex , Respiration/physiology
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