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1.
Am J Vet Res ; 85(4)2024 Apr 01.
Article in English | MEDLINE | ID: mdl-38335721

ABSTRACT

OBJECTIVE: The objective of this study was to determine the seroprevalence of reproductive and infectious diseases in tropical cattle in the Tambopata and Tahuamanu Provinces in the department of Madre de Dios, Peru. SAMPLE: 156 bovines from 7 cattle farms were sampled. These farms used exclusive grazing for food and natural mating for reproduction and did not have sanitary or vaccination programs. METHODS: The serum of blood samples was subjected to ELISA with commercial kits for the detection of antibodies against Neospora caninum, Mycobacterium avium subsp paratuberculosis (MAP), Leptospira interrogans, pestivirus bovine viral diarrhea virus-1, retrovirus bovine leukemia virus (BLV), orbivirus bluetongue virus (BTV), and herpesvirus bovine herpes virus-1 (BHV). The data were analyzed by means of association tests with χ2 (P < .05) and Spearman rank correlation (P < .05) in the SPSS v.15.0 software (IBM Corp). RESULTS: A low prevalence of antibodies to L interrogans, N caninum, M avium subsp paratuberculosis, bovine viral diarrhea virus-1 was found, but it was high to BTV, BLV, and BHV (100%, 53.85%, and 72.44%, respectively). The presence of BLV and BHV was higher in the Las Piedras District, bovines less than 5 years old, and cattle with breed characteristics of zebu and crossbred (P < .01). In addition, there was a significant correlation between both infections, showing 83.3% of BLV positivity that were also BHV positive (P < .01). CLINICAL RELEVANCE: The high prevalence of antibodies to BTV, BHV, and BLV could be due to livestock management practices, direct contact with infected animals, and variation of the presence of vectors and natural reservoirs in the context of climate change in the tropics.


Subject(s)
Bovine Virus Diarrhea-Mucosal Disease , Cattle Diseases , Communicable Diseases , Diarrhea Virus 1, Bovine Viral , Diarrhea Viruses, Bovine Viral , Enzootic Bovine Leukosis , Leukemia Virus, Bovine , Paratuberculosis , Cattle , Animals , Paratuberculosis/epidemiology , Cattle Diseases/epidemiology , Enzootic Bovine Leukosis/epidemiology , Peru/epidemiology , Seroepidemiologic Studies , Antibodies, Viral , Antibodies, Bacterial , Communicable Diseases/veterinary , Reproduction , Diarrhea/veterinary
2.
Trop Anim Health Prod ; 56(2): 63, 2024 Jan 30.
Article in English | MEDLINE | ID: mdl-38291289

ABSTRACT

Infectious sporadic abortions in cattle are mainly caused by opportunistic bacteria and fungi usually present in environmental or gastrointestinal and reproductive microbiota of healthy animals. A retrospective analysis was carried out to evaluate the main opportunistic microorganisms involved in bovine abortions recorded at INTA Balcarce (Argentina) from 1997 to 2023, accounting for 2.2% of the total diagnosed etiologies of bovine abortion. The opportunistic agents identified as the cause of abortion in 29 fetuses were bacteria (90%) and fungi (10%). Escherichia coli (n = 8), Trueperella pyogenes (n = 5), and Histophilus somni (n = 4) were the bacterial species most often identified as causing infectious abortions, whereas Aspergillus spp. (n = 3) was implicated in all fungal abortions identified. Pure culture of bacteria or fungus was achieved from abomasal content and/or lung essential. Main microscopic findings were bronchopneumonia, myo- and epicarditis, meningitis, and portal hepatitis. Herein, we highlight the importance of detecting potential infectious bacteria in cultures to improve etiological diagnosis of bovine abortions associated with compatible microscopic findings to confirm the etiology.


Subject(s)
Cattle Diseases , Communicable Diseases , Pregnancy , Female , Animals , Cattle , Retrospective Studies , Cattle Diseases/microbiology , Communicable Diseases/veterinary , Reproduction , Bacteria , Abortion, Veterinary/epidemiology , Abortion, Veterinary/etiology
3.
Trop Anim Health Prod ; 55(5): 294, 2023 Sep 01.
Article in English | MEDLINE | ID: mdl-37656253

ABSTRACT

Enzootic bovine leukosis (EBL) is a chronic infectious disease caused by the bovine leukosis virus (BLV), a Deltaretrovirus. Bovine viral diarrhea (BVD) is an infectious disease caused by a pestivirus. Bovine neosporosis is caused by the obligate intracellular parasite Neospora caninum (Nc). These pathogens can have horizontal (postnatal) or vertical (transplacental) transmissions and affect the productive and reproductive performance of infected bovines. This work aimed to detect BLV, BVD, and Nc seroprevalence in specialized dairy cattle from the north, east, and Aburrá Valley regions of the Department of Antioquia, the highest in milk production regions in Antioquia. A total of 599 blood samples, obtained from 53 specialized dairy cattle herds, were evaluated by the ELISA test. The results revealed a seroprevalence of 41.13% for BLV (242/599), 28.48% (163/599) for Nc, and 22.7% (132/599) for BVD. Regarding the regional seroprevalence evaluation, BLV was found in 47.02% of the samples from the east, 36.87% from the north, and 46.02% from the Aburrá Valley. Nc was found in 31.03% of the samples from the east, 24.26% from the north, and 36.63% from Aburrá Valley. BVD was found in 21.62% of the samples from the east, 25.03% from the north region, and 10.39% of the samples from the Aburrá Valley. It is highlighted by these results that the north region, with the highest milk production in Antioquia, had the lowest BLV and Nc seroprevalences but the highest seroprevalence of BVD. BLV has increased in Antioquia in recent years, and as an immunosuppressive infection, opportunities for other pathogens are created by it. A significant statistical difference was found in the average prevalence of the pathogens according to the municipality, cattle breed, and region of origin of the sample. The seroprevalence of these pathogens in specialized dairy herds in Antioquia can be classified as medium-low. However, it is recommended that biosecurity practices should be maximized to avoid the spread of these pathogens due to the variability detected in the region, municipality, breed group, and herd age. The rapid and efficient diagnosis of these three pathogens through reliable methodologies will allow for the control of dissemination in dairy herds.


Subject(s)
Cattle Diseases , Communicable Diseases , Enzootic Bovine Leukosis , Leukemia Virus, Bovine , Neospora , Animals , Cattle , Colombia , Enzootic Bovine Leukosis/epidemiology , Seroepidemiologic Studies , Communicable Diseases/veterinary , Diarrhea/veterinary
4.
Vet Pathol ; 60(3): 352-359, 2023 05.
Article in English | MEDLINE | ID: mdl-36869834

ABSTRACT

Ocular involvement in systemic diseases is frequent in cats; however, without concurrent clinical and ophthalmic examinations with gross and/or histologic analysis of the eye, these findings can be underdiagnosed. This article aims to provide gross, histologic, and immunohistochemical characteristics of ocular lesions from cats submitted to necropsy, focusing on those caused by systemic infectious agents. Cats that died due to a systemic infectious disease were selected based on necropsy diagnosis and presence of ocular lesions. Gross, histologic, and immunohistochemical findings were recorded. From April 2018 to September 2019, 849 eyes of 428 cats were evaluated. Histologic abnormalities were seen in 29% of cases, which were classified as inflammatory (41%), neoplastic (32%), degenerative (19%), and metabolic/vascular (8%). Macroscopic changes were present in one-third of eyes with histologic lesions. Of these, 40% were attributed to inflammatory or neoplastic diseases associated with infectious agents. The most important infectious agents causing ocular disease in this study were feline leukemia virus, feline infectious peritonitis virus, and Cryptococcus sp. The most common ocular abnormalities associated with infectious agents were uveitis (anterior, posterior, or panuveitis), optic neuritis, and meningitis of the optic nerve. Ocular lesions secondary to systemic infections in cats are frequent; however, these are not always diagnosed because gross lesions are less common than histologic lesions. Therefore, both gross and histologic evaluation of the eyes of cats is recommended, mainly for cases in which the clinical suspicion or necropsy diagnosis suggests that an infectious agent might be related to the cause of death.


Subject(s)
Cat Diseases , Communicable Diseases , Feline Infectious Peritonitis , Neoplasms , Sepsis , Uveitis , Cats , Animals , Eye/pathology , Uveitis/pathology , Uveitis/veterinary , Neoplasms/pathology , Neoplasms/veterinary , Sepsis/pathology , Sepsis/veterinary , Communicable Diseases/pathology , Communicable Diseases/veterinary , Cat Diseases/pathology , Feline Infectious Peritonitis/pathology
5.
Ciênc. Anim. (Impr.) ; 33(1): 107-116, jan.-mar. 2023. tab, ilus
Article in Portuguese | VETINDEX | ID: biblio-1434517

ABSTRACT

Estima-se que as otites externas estão presentes em 2 a 10% dos atendimentos na clínica de felinos, correspondendo a uma afecção clinicamente desafiadora nessa espécie. Diante disso, este trabalho tem como objetivo realizar um levantamento retrospectivo da ocorrência de otopatias em felinos no município de Fortaleza/CE, em um período de três anos, contribuindo para o estabelecimento do perfil epidemiológico da região. O estudo foi realizado através da coparticipação de médicos-veterinários dermatólogos e clínicos de felinos, sendo elaborado de forma retrospectiva avaliando-se fichas clínicas de gatos com histórico de otopatias. Os dados demonstraram uma maior frequência de otites associadas às causas infecciosas, com 30% dos gatos acometidos pela levedura Malassezia spp., 17% por bactérias do tipo cocos e 1% pelo fungo dimórfico Sporothix schencki, seguido de origem parasitária pelos ácaros Otodectes cynotis e Notoedres cati com 18% e 2% dos animais estudados, respectivamente. Na associação entre os patógenos, a maior incidência correspondeu à infecção mista por fungos e bactérias (17%). Tratando-se de raças, os SRD obtiveram uma maior frequência geral no estudo e gatos machos foram mais acometidos em relação às fêmeas. Logo, ressalta-se a importância de estudos retrospectivos para a saúde única, a partir do estabelecimento do perfil epidemiológico da região e da identificação de potenciais agentes zoonóticos.


It is estimated that external otitis accounts for 2 to 10% of attendances at to the feline clinics, corresponding to a clinically challenging condition in this species. This work aims to carry out a retrospective survey of the occurrence of otopathies in cats in the city of Fortaleza/Ce in a period of 3 years, contributing to the establishment of the epidemiological profile of the region. The study was carried out through the co-participation of veterinarians, dermatologists and feline clinicians, and was elaborated retrospectively by evaluating clinical records of cats with a history of ear diseases. The data showed a higher frequency of otitis associated with infectious causes, with 30% of cats affected by the yeast Malassezia spp., 17% by coccus-type bacteria, and 1% by the dimorphic fungus Sporothix schencki, followed by otitis of parasitic origin caused by the mites Otodectes cynotis and Notoedres cati, corresponding to 18% and 2% of the studied animals, respectively. In the association between pathogens, the highest incidence corresponded to mixed infection by fungi and bacteria (17%). Regarding the breeds, SRD presented a higher overall frequency in the study, and male cats were more affected than females. Therefore, the importance of retrospective studies for single health is emphasized, based on the establishment of the epidemiological profile of the region and the identification of potential zoonotic agents.


Subject(s)
Animals , Cats , Otitis/veterinary , Cat Diseases/epidemiology , Zoonoses , Communicable Diseases/veterinary , Ear Diseases/veterinary
6.
Ciênc. rural (Online) ; 53(8): e20220218, 2023. tab, mapas, ilus
Article in English | VETINDEX | ID: biblio-1418157

ABSTRACT

The increase in sheep production is directly related to the health status of the flock. Brazil is one of the largest sheep producers in the world, and the sheep flock is concentrated in southern and northeast regions. Infectious diseases are responsible for severe economic losses resulting from a decrease in milk and meat production, deaths, and cost of treatment. Among infectious diseases, viral diseases are described chiefly in case reports or retrospective studies. This study aimed to review the main features of viral diseases that affect sheep in Brazil and their current situation in the Brazilian territory. We included eight viral diseases described in Brazil: rabies, bluetongue, contagious ecthyma, foot and mouth disease, visna-maedi, enzootic nasal tumor, ovine pulmonary adenocarcinoma, and border disease. We review the etiological, epidemiological, clinical, and pathological findings for each agent and included differential diagnoses, information on recommended diagnostic methods to confirm the disease etiology, and control measures. This study served as quick consultation material for field veterinarians for an accurate diagnosis.


O aumento da produção ovina está diretamente relacionado ao status sanitário do rebanho. O Brasil é um dos maiores produtores mundiais de ovinos, e o rebanho está concentrado nas regiões nordeste e sul do país. As doenças infecciosas são responsáveis por perdas econômicas severas que resultam da diminuição na produção de leite e carne, mortes e custos com tratamentos. Entre os agentes infecciosos, as doenças de origem viral são, em sua maioria, descritas em relatos de caso ou estudos retrospectivos. Este estudo teve como objetivo revisar as principais características das doenças virais que afetam ovinos no território brasileiro, e qual sua situação atual. Nós incluímos oito doenças virais diagnosticadas no Brasil: raiva, língua azul, ectima contagioso, febre aftosa, maedi-visna, tumor enzoótico nasal, adenocarcinoma pulmonar ovino, e pestivirose. Revisamos os achados etiológicos, epidemiológicos, clínicos e patológicos de cada agente e incluímos seus respectivos diagnósticos diferenciais, informações acerca dos métodos diagnósticos para confirmação da etiologia da doença e medidas de controle e prevenção. Esse estudo tem o propósito de servir como objetivo servir de material de consulta rápida, especialmente para veterinários de campo realizar um diagnóstico acurado.


Subject(s)
Animals , Sheep Diseases/diagnosis , Virus Diseases/veterinary , Communicable Diseases/veterinary
7.
Ciênc. rural (Online) ; 53(8): e20220166, 2023. tab, graf
Article in English | VETINDEX | ID: biblio-1418168

ABSTRACT

Although the epizootiological profile of canine distemper in Goiânia is unknown, there is clinical evidence for a high incidence of canine distemper virus (CDV) infection among dogs. Therefore, this study determined the epizootiological characteristics of canine distemper in naturally infected dogs. Data of 46 dogs that tested positive for the CDV based on immunochromatography or reverse transcription-polymerase chain reaction were collected. Data on the sex, breed, age, and vaccination status were obtained from these dogs, and extraneural and neural sign analyses were performed. Although, the infected dogs belonged to both sexes, different breeds, and different age groups, a greater proportion of cases were seen in adults (1-6 years), undefined breeds, and unvaccinated dogs. Among the CDV-positive dogs, 10.87% had been vaccinated. In addition, 4.35% showed neural signs, 8.69% showed extraneural signs, and 86.96% showed both. High lethality was observed, with viral antigen and/or DNA detected in 82.61% dead dogs. Only 8.70% of the total CDV-infected dogs remained alive at the time of their assessment.


Embora o perfil epizootiológico da cinomose canina em Goiânia seja desconhecido, há evidencia clínica para alta incidência da infecção pelo vírus da cinomose (CDV) nos cães. Este estudo objetivou determinar as características epizootiológicas da cinomose em cães naturalmente infectados. Dados de 46 cães positivos por imunocromatografia ou reação em cadeia da polimerase via transcriptase reversa para o CDV foram coletados. Dados sobre sexo, raça, idade, estado vacinal foram obtidos desses cães, e os sinais extraneurais e neurais foram analisados. Animais de ambos os sexos, diferentes raças e idades foram acometidos. A maior proporção de casos foi vista em adultos (de um a seis anos), sem raça definida e não vacinados. Dentre os cães positivos, 10,87% haviam sido vacinados. Em adição, 4,35% apresentaram sinais neurais, 8,69% sinais extraneurais e 86,96% mostraram ambos. Alta letalidade foi observada, com o antígeno viral e/ou DNA identificado em 82,61% dos cães que foram a óbito. Apenas 8,7% dos cães infectados permaneceram vivos até o momento da avaliação.


Subject(s)
Animals , Dogs , Communicable Diseases/veterinary , Distemper/epidemiology , Distemper Virus, Canine , Dog Diseases
8.
Ciênc. rural (Online) ; 53(10): e20220351, 2023. mapas, tab
Article in English | VETINDEX | ID: biblio-1418796

ABSTRACT

Sporotrichosis is a subcutaneous mycosis caused by fungus of the Sporothrix complex, and in Brazil the main species reported is Sporothrix brasiliensis, of which the diseased cat is the transmitter. Although, its occurrence has increased in the state of Paraíba, Brazil, since 2016, data on the disease in this state are limited. Therefore, this research aimed to identify molecularly isolates of Sporothrix spp. from domestic cats from cities in Paraíba, and in this way to expand the understanding of the disease in the state. Thirty-nine samples were analyzed, obtained from skin lesions of domestic felines, from the following cities in Paraíba: João Pessoa, Pilões, Patos, Areia, Bananeiras and Guarabira. Cytological analysis was performed to screen the samples, followed by fungal culture, and the molecular characterization of the isolates was performed, using the species-specific Polymerase Chain Reaction (PCR) or partial sequencing of the calmodulin gene. All isolates were identified as S. brasiliensis. The sequencing showed 100% similarity to the S. brasiliensis CBS 120339 strain. In view of this, it is concluded that in the study areas the species involved in cases of feline sporotrichosis is S. brasiliensis, its presence in Paraíba demonstrated the spread of the agent in regions distant from the epicenters in Brazil, alerting to the possible occurrence of zoonotic outbreaks similar to those found in the South and Southeast regions of the country. In addition, it highlights the emerging role of felines in the transmission of sporotrichosis in new endemic areas of Brazil.


A esporotricose é uma micose subcutânea causada por fungos do complexo Sporothrix, e no Brasil a principal espécie relatada é Sporothrix brasiliensis da qual o transmissor é o gato doente. Embora sua ocorrência tenha aumentado no estado da Paraíba, Brasil, desde 2016, os dados sobre a doença neste estado são limitados. Diante disso, esta pesquisa teve por objetivo identificar, molecularmente, isolados de Sporothrix spp. procedentes de felinos domésticos de cidades da Paraíba, e dessa maneira expandir a compreensão da enfermidade no estado. Foram analisadas 39 amostras, obtidas de lesões cutâneas de felinos domésticos, oriundos das seguintes cidades paraibanas: João Pessoa, Pilões, Patos, Areia, Bananeiras e Guarabira. Realizou-se análise citológica, para triagem das amostras, a seguir cultura fúngica, e posteriormente a caracterização molecular dos isolados, utilizando a Reação em Cadeia da Polimerase (PCR), espécie-específica ou sequenciamento parcial do gene calmodulina. Todos os isolados foram identificados molecularmente como S. brasiliensis. O sequenciamento demonstrou 100% de similaridade com a cepa S. brasiliensis CBS 120339. Contudo, conclui-se que nas áreas do estudo a espécie envolvida em casos de esporotricose felina é S. brasiliensis, sua presença na Paraíba demonstra a disseminação do agente em regiões distantes dos epicentros no Brasil, alertando para a possível ocorrência de surtos zoonóticos, semelhantes aos encontrados nas regiões Sul e Sudeste do país. Além disso, destaca o papel emergente dos felinos na transmissão da esporotricose em novas áreas endêmicas do Brasil.


Subject(s)
Animals , Cats , Sporotrichosis/veterinary , Sporothrix/pathogenicity , Cat Diseases , Communicable Diseases/veterinary
9.
Braz. j. vet. pathol ; 16(1): 1-34, mar. 2023. tab, ilus
Article in English | VETINDEX | ID: biblio-1425299

ABSTRACT

Neotropical primates are represented by more than 200 species and subspecies distributed in five families. Considering that some of these species are considered endangered, disease investigation in these populations is critical for conservation strategies. Therefore, an increasing number of studies and publications on this topic became available in the past few years. This review deals with infectious diseases of neotropical primates, with focus on free-ranging animals, including those caused by bacterial, viral, protozoal, metazoan, or mycotic infectious organisms, with particular emphasis on gross and microscopic lesions associated with these diseases. In addition, a few relevant unpublished cases of infection by Staphylococcus spp., Streptococcus spp., E. coli and Pseudomonas spp. were included in this review.(AU)


Subject(s)
Animals , Primates/microbiology , Pseudomonas Infections/diagnosis , Staphylococcal Infections/diagnosis , Streptococcal Infections/diagnosis , Communicable Diseases/veterinary , Primate Diseases/microbiology , Pseudomonas , Staphylococcus/pathogenicity , Streptococcus
10.
Rio de Janeiro; s.n; 29/06/2022. 87 p.
Thesis in Portuguese | SES-RJ | ID: biblio-1381541

ABSTRACT

Este trabalho teve como objetivo investigar, no âmbito temporal e espacial, a ocorrência de esporotricose humana e animal na região metropolitana do Rio de Janeiro no período de 2013 a 2020, além de identificar áreas de priorização no combate à doença.


Subject(s)
Spores, Fungal/classification , Sporotrichosis/prevention & control , Sporotrichosis/veterinary , Animal Diseases/prevention & control , Sporotrichosis/drug therapy , Cat Diseases/transmission , Communicable Diseases/veterinary , Brazilian Health Surveillance Agency , Fungi/classification
11.
Trop Anim Health Prod ; 54(3): 171, 2022 Apr 26.
Article in English | MEDLINE | ID: mdl-35471467

ABSTRACT

Gastrointestinal nematodes cause serious economic losses in sheep production systems. To determine the prevalence and risk factors associated with these parasites, a study was conducted on 595 sheep in Córdoba, Colombia. Prevalence and parasite burden were determined using the McMaster technique. Larvae were cultured from feces to identify the nematode genera. For the analysis of associated factors and parasite burden, data means, medians, and confidence intervals were compared. A georeferenced data analysis was performed and an epidemiological map was constructed. An overall prevalence of 88.2% was found, with the highest prevalence and parasite burden for Strongylida (83.2%) and Strongyloides (41%) nematodes. The mean parasite burden was 1255 eggs per gram. The gastrointestinal nematode genera identified were Trichostrongylus, Strongyloides, Haemonchus, Oesophagostomum, Bunostomum, and Cooperia. In general, a significant association was found between parasite burden and dewormed animals, anthelmintic used, date of last deworming, and breeds. The FAMACHA® method and body condition showed a significant association with the Strongylida parasite burden. Clusters with higher intensity of gastrointestinal nematode burden and high prevalence were observed in the regions of Bajo Sinú, Sinú Medio, and San Jorge.


Subject(s)
Communicable Diseases , Gastrointestinal Diseases , Nematoda , Nematode Infections , Parasites , Sheep Diseases , Strongylida , Animals , Colombia/epidemiology , Communicable Diseases/veterinary , Gastrointestinal Diseases/veterinary , Nematode Infections/epidemiology , Nematode Infections/parasitology , Nematode Infections/veterinary , Ovum , Parasite Egg Count/veterinary , Sheep , Sheep Diseases/epidemiology , Sheep Diseases/parasitology
12.
Vet Immunol Immunopathol ; 247: 110416, 2022 May.
Article in English | MEDLINE | ID: mdl-35358749

ABSTRACT

BACKGROUND: The thymus is necessary for the differentiation of T cells, a process that is regulated by the type of antigens found in thymocytes, the environment of surrounding cells and the thymus architecture. There is evidence that infectious diseases may result in morphological changes in this organ, such as premature atrophy and decreased thymocyte proliferation, that can affect the immune response. OBJECTIVES: We characterised the morphology and tissue distribution of haematopoietic and stromal cells in the thymuses of dogs naturally infected with Leishmania infantum, with the aim to determine the changes that may contribute to the pathophysiology of the disease. METHODS: Thymus samples were collected from 15 animals (aged 6 months to 5 years) ELISA-positive for leishmaniasis and from 10 dogs from non-endemic regions for leishmaniasis whose death was not related to infectious causes. The samples were submitted to histological processing and staining with Haematoxylin-Eosin to assess thymic morphometry and histopathological changes. Masson's trichrome staining was used to quantify the connective tissue present (collagen). The immunohistochemical method was used to determine the cellular constitution of the thymus, using antibodies that aimed at marking T lymphocytes (anti-CD3), B lymphocytes (anti-CD79a), macrophages (anti- MAC387), mesenchymal cells (anti-vimentin), epithelial cells (anti-cytokeratin), cells in mitosis (anti-Ki67) and cells in apoptosis (anti-caspase-3). RESULTS: The histopathological evaluation of infected dogs showed more signs consistent with thymus atrophy, including decreased parenchyma, infiltration of adipose and connective tissue near the capsule and between the lobules, lymphoid rarefaction mainly in the cortical region and loss of the cortical-medullary demarcation. In addition, we observed a decrease in the amounts of CD3 + T lymphocytes, macrophages (MAC387) and Ki67-positive cells and an increase in the number of cells positive for cytokeratin and CD79a (B lymphocytes). Finally, the parasite was detected in 46% of infected thymuses and may contribute for the observed changes. CONCLUSIONS: Apparently, leishmaniasis, like other infectious diseases, causes atrophy of the thymus and depletion of thymocytes with a relative increase in thymus epithelial cells. These morphological changes in the normal organisation of the thymus by mechanisms not yet well known may result in the abnormal release of T cells, with consequent damage to the host's immune response.


Subject(s)
Communicable Diseases , Dog Diseases , Leishmania infantum , Leishmaniasis , Animals , Atrophy/pathology , Atrophy/veterinary , Communicable Diseases/veterinary , Dog Diseases/pathology , Dogs , Leishmaniasis/veterinary , T-Lymphocytes , Thymus Gland
13.
Transbound Emerg Dis ; 69(4): 1727-1738, 2022 Jul.
Article in English | MEDLINE | ID: mdl-33963679

ABSTRACT

This study evaluates through modelling the possible individual and combined effect of three populational parameters of pathogens (reproduction rate; rate of novelty emergence; and propagule size) on the colonization of new host species-putatively the most fundamental process leading to the emergence of new infectious diseases. The results are analysed under the theoretical framework of the Stockholm Paradigm using IBM simulations to better understand the evolutionary dynamics of the pathogen population and the possible role of Ecological Fitting. The simulations suggest that all three parameters positively influence the success of colonization of new hosts by a novel parasite population, but contrary to the prevailing belief, the rate of novelty emergence (e.g. mutations) is the least important factor. Maximization of all parameters results in a synergetic facilitation of the colonization and emulates the expected scenario for pathogenic microorganisms. The simulations also provide theoretical support for the retention of the capacity of fast-evolving lineages to retro-colonize their previous host species/lineage by ecological fitting. Capacity is, thus, much larger than we can anticipate. Hence, the results support the empirical observations that opportunity of encounter (i.e. the breakdown in mechanisms for ecological isolation) is a fundamental determinant to the emergence of new associations-especially Emergent Infectious Diseases-and the dynamics of host exploration, as observed in SARS-CoV-2. Insights on the dynamics of Emergent Infectious Diseases derived from the simulations and from the Stockholm Paradigm are discussed.


Subject(s)
COVID-19 , Communicable Diseases , Accidents , Animals , COVID-19/epidemiology , COVID-19/veterinary , Communicable Diseases/parasitology , Communicable Diseases/veterinary , Host-Parasite Interactions , SARS-CoV-2/genetics
14.
Trop Anim Health Prod ; 53(5): 493, 2021 Oct 01.
Article in English | MEDLINE | ID: mdl-34599403

ABSTRACT

Proper health management is essential for productivity in duck farming. However, there is limited information on the effect of management conditions on rates of metabolic problems and parasitic infections in anatids. We evaluated the rates of metabolic syndromes and gastrointestinal parasite involvement in Muscovy ducks up to 12 weeks of age, under 3 management conditions: backyard, organized, and organized with probiotics. Individuals under organized management developed 2 metabolic problems: ascites, which was rare (3.5%), fatal, and affected both males and females, and angel wing syndrome, which was more frequent (10.6%), has low impact on general health, and only affected males. The treatments do not have a significant effect on the development of ascites, but only individuals in controlled conditions presented this syndrome, and due to its low prevalence, further studies with a larger sample size are required. The risk of angel wing syndrome increased significantly with probiotic supplementation. Regarding to parasitic infection, the improvement of sanitary management and the use of probiotics supplementation reduced the occurrence of coccidiosis. Similarly organized management with probiotic supplementation showed a protective effect on helminthiasis by reducing the frequency of Heterakis gallinarum and greatly reducing the helminth egg load. Coccidiosis and helminthiasis infections were not significantly correlated with the final weight of the ducks. Therefore, organized management and the use of probiotics seems to reduce the impact of parasitic infection, although it increases the risk of developing metabolic syndrome.


Subject(s)
Coccidiosis , Communicable Diseases , Metabolic Syndrome , Parasitic Diseases , Animals , Coccidiosis/veterinary , Communicable Diseases/veterinary , Ducks , Female , Male , Metabolic Syndrome/epidemiology , Metabolic Syndrome/veterinary
15.
Arq. bras. med. vet. zootec. (Online) ; 72(4): 1127-1136, July-Aug. 2020. tab, graf
Article in English | VETINDEX | ID: vti-30185

ABSTRACT

The urgency of the studied problem is due to the need for epizootic monitoring of equine infectious diseases in the Altai Krai and the lack of basic information on the relative and absolute parameters of changes in the epizootic process, scientific, methodological and practical aspects of the assessment of potential risks. The purpose of the article is to study the epizootic process for each nosological form of equine infectious diseases in the Altai Krai based on statistical information over the period from 1964 to 2017. Epizootic method is a leading method of the study of this problem, which allows the identification and discussion of the association of equine infectious diseases with natural and geographical conditions in the Altai Krai. The article presents data on intensive parameters of the epizootic process of equine infectious diseases and their changes with a description of periodic changes in the Altai Krai. The materials of the article provide veterinary and biology specialists with information on the epizootics of various nosological forms of equine infectious diseases in the Altai Krai.(AU)


A urgência do problema estudado é devida à necessidade de monitoramento epizoótico de doenças infecciosas equinas no Krai de Altai, e a falta de informação básica sobre os parâmetros relativos e absolutos de mudanças no processo epizoótico, e aspectos científicos, metodológicos e práticos da avaliação de potenciais riscos. O propósito do artigo é estudar o processo epizoótico para cada forma nosológica de doenças infecciosas equinas no Krai de Altai, baseado em informação estatística no período de 1964 a 2017. O método epizoótico é o principal método de estudo deste problema, que permite a identificação e discussão da associação entre doenças infecciosas equinas e condições naturais e geográficas do Krai de Altai. Este artigo apresenta dados dos parâmetros intensivos do processo epizoótico de doenças infecciosas bovinas e suas mudanças com uma descrição de mudanças periódicas no Krai de Altai. Os materiais do artigo fornecem informações para especialistas na veterinária e biologia com relação aos epizoóticos de diversas formas nosológicas de doenças infecciosas equinas no Krai de Altai.(AU)


Subject(s)
Animals , Disease Outbreaks/veterinary , Horse Diseases/epidemiology , Horses , Epidemiologic Studies , Communicable Diseases/veterinary , Russia/epidemiology
16.
Arq. bras. med. vet. zootec. (Online) ; 72(4): 1127-1136, July-Aug. 2020. tab, graf
Article in English | LILACS, VETINDEX | ID: biblio-1131464

ABSTRACT

The urgency of the studied problem is due to the need for epizootic monitoring of equine infectious diseases in the Altai Krai and the lack of basic information on the relative and absolute parameters of changes in the epizootic process, scientific, methodological and practical aspects of the assessment of potential risks. The purpose of the article is to study the epizootic process for each nosological form of equine infectious diseases in the Altai Krai based on statistical information over the period from 1964 to 2017. Epizootic method is a leading method of the study of this problem, which allows the identification and discussion of the association of equine infectious diseases with natural and geographical conditions in the Altai Krai. The article presents data on intensive parameters of the epizootic process of equine infectious diseases and their changes with a description of periodic changes in the Altai Krai. The materials of the article provide veterinary and biology specialists with information on the epizootics of various nosological forms of equine infectious diseases in the Altai Krai.(AU)


A urgência do problema estudado é devida à necessidade de monitoramento epizoótico de doenças infecciosas equinas no Krai de Altai, e a falta de informação básica sobre os parâmetros relativos e absolutos de mudanças no processo epizoótico, e aspectos científicos, metodológicos e práticos da avaliação de potenciais riscos. O propósito do artigo é estudar o processo epizoótico para cada forma nosológica de doenças infecciosas equinas no Krai de Altai, baseado em informação estatística no período de 1964 a 2017. O método epizoótico é o principal método de estudo deste problema, que permite a identificação e discussão da associação entre doenças infecciosas equinas e condições naturais e geográficas do Krai de Altai. Este artigo apresenta dados dos parâmetros intensivos do processo epizoótico de doenças infecciosas bovinas e suas mudanças com uma descrição de mudanças periódicas no Krai de Altai. Os materiais do artigo fornecem informações para especialistas na veterinária e biologia com relação aos epizoóticos de diversas formas nosológicas de doenças infecciosas equinas no Krai de Altai.(AU)


Subject(s)
Animals , Disease Outbreaks/veterinary , Horse Diseases/epidemiology , Horses , Epidemiologic Studies , Communicable Diseases/veterinary , Russia/epidemiology
17.
Rev. cient. eletrônica med. vet ; (34): 14p-jan. 2020. graf, tab
Article in Portuguese | VETINDEX | ID: biblio-1494370

ABSTRACT

Este trabalho tem como objetivo, apresentar a relevância e o alcance dos protocolos de vacinação e fornecer dados sobre a incidência de doenças infecciosas em cães no Hospital Veterinário Universitário da UNICEP. Dessa forma, questões importantes sobre determinados fatores como: a importância da vacinação; a responsabilidade dos tutores no oferecimento dessas vacinas; a disposição das legislações do município de São Carlos e o estudo comparativo entre os custos médios dos tratamentos e da profilaxia, serão apresentadas neste trabalho a partir de uma leitura qualitativa dos dados, resultados desta pesquisa, coletados no período de agosto de 2018 a maio de 2019.


This work aims to present the relevance and scope of vaccination protocols and provide data about the incidence of infectious diseases in dogs at the University Veterinary Hospital UNICEP. Thus, important questions about certain factors such as: the importance of vaccination; guardians' responsibility in offering these vaccines; the disposition of the laws of the municipality of São Carlos and the comparative study between the average costs of treatments and prophylaxis, will be presented in this work from a qualitative reading of the data, results of this research, collected from August 2018 to May 2019.


Subject(s)
Animals , Dogs , Distemper/epidemiology , Communicable Diseases/veterinary , Dog Diseases , Guidelines as Topic , Leptospirosis/epidemiology , Leptospirosis/veterinary , Parvovirus, Canine , Vaccination/veterinary
18.
Acta sci. vet. (Impr.) ; 48: Pub.1768-Jan. 30, 2020. ilus, tab
Article in Portuguese | VETINDEX | ID: biblio-1458291

ABSTRACT

Background: Antillean manatee (Trichechus manatus) and Amazonian manatee (Trichechus inunguis) are the two species of manatees that occur in Brazil, and both are endangered. Studies on manatee disease in Brazil were previously based mainly on Florida manatees. In recent years, these studies have increased in Brazil. Thus, the objective was to carry out a survey of the publications of infectious and non-infectious diseases in the two species of manatees that occur in the country, to assist in the identification of threats to the species and in the health assessment of manatees in the country. Review: Regarding infectious and contagious diseases, parasites have affected both species of manatees in Brazil, such as Pulmonicola cochleotrema in wild T. manatus, Toxoplasma gondii in both species, and Cryptosporidium spp. also in both species, this being an important agent of zoonotic character. Giardia sp., another zoonotic parasite, has also been reported in both species of manatees in Brazil. Mycotic lesions caused by B. hawaiiensis have been described in calves of T. manatus in captivity. Meanwhile, Candida sp., Trichosporon sp., Rhodotorula sp., and Cryptococcus sp. have been identified in T. inunguis. Studies on viruses in manatees are still not widespread compared to other species; however, it has been verified that rotavirus is present in T. manatus in captivity. In studies carried out to identify bacteria in T. manatus, the following bacteria were isolated: Arizona sp., Bacillus sp., Corynebacterium equi, Corynebacterium pseudodiphteriticum, Corinebacterium sp., Edwasiella tarda, Enterobacter aerogenes, Enterobacter agglomerans, Enterobacter sakasakii, Escherichia coli, Leptospira spp., Proteus sp., Proteus vulgaris, Providencia rettgeri...


Subject(s)
Animals , Communicable Diseases/veterinary , Noncommunicable Diseases , Health Surveys , Sirenia , Trichechus manatus , Brazil
19.
R. cient. eletr. Med. Vet. ; (34): 14 p, jan. 2020. graf, tab
Article in Portuguese | VETINDEX | ID: vti-27388

ABSTRACT

Este trabalho tem como objetivo, apresentar a relevância e o alcance dos protocolos de vacinação e fornecer dados sobre a incidência de doenças infecciosas em cães no Hospital Veterinário Universitário da UNICEP. Dessa forma, questões importantes sobre determinados fatores como: a importância da vacinação; a responsabilidade dos tutores no oferecimento dessas vacinas; a disposição das legislações do município de São Carlos e o estudo comparativo entre os custos médios dos tratamentos e da profilaxia, serão apresentadas neste trabalho a partir de uma leitura qualitativa dos dados, resultados desta pesquisa, coletados no período de agosto de 2018 a maio de 2019.(AU)


This work aims to present the relevance and scope of vaccination protocols and provide data about the incidence of infectious diseases in dogs at the University Veterinary Hospital UNICEP. Thus, important questions about certain factors such as: the importance of vaccination; guardians' responsibility in offering these vaccines; the disposition of the laws of the municipality of São Carlos and the comparative study between the average costs of treatments and prophylaxis, will be presented in this work from a qualitative reading of the data, results of this research, collected from August 2018 to May 2019.(AU)


Subject(s)
Animals , Dogs , Dog Diseases , Vaccination/veterinary , Guidelines as Topic , Distemper/epidemiology , Parvovirus, Canine , Leptospirosis/epidemiology , Leptospirosis/veterinary , Communicable Diseases/veterinary
20.
Braz J Microbiol ; 51(1): 357-368, 2020 Mar.
Article in English | MEDLINE | ID: mdl-31650465

ABSTRACT

Bovine viral diarrhea virus (BVDV, Pestivirus) causes significant economic losses to the livestock industry worldwide. Although serological surveys show that BVDV exposure is widespread in cattle in Uruguay, BVDV-associated diseases are greatly underreported. The aim of this work is to describe the epidemiological, clinical, pathological, and virological findings from spontaneous outbreaks of BVDV-associated diseases in cattle in Uruguay. Diagnostic investigations were performed during 6 spontaneous disease outbreaks on beef and dairy cattle farms in the departments of Colonia, Rio Negro, and Soriano between November 2016 and April 2018. Carcasses of 8 naturally deceased cattle from these outbreaks were necropsied and subjected to histological examination and immunohistochemistry to detect BVDV antigen in the tissues. Reverse transcription real-time PCR and genomic sequencing were also performed to identify BVDV at the species and subtype levels. Other ancillary diagnostic tests, including bacterial cultures, were performed on a case-by-case basis to rule in/out differential diagnoses based on initial clinicopathological presumptive diagnoses. BVDV-associated conditions that were diagnosed in the 8 cases included mucosal disease, transient postnatal BVDV infections associated with digestive/septicemic salmonellosis by Salmonella serovar typhimurium, Histophilus somni bronchopneumonia, urinary tract coinfections with Escherichia coli and Streptococcus sp., enteric coinfection with coccidia, and transplacental fetal infections and abortions with Neospora caninum coinfection. BVDV-1a and BVDV-2b were each identified in four of the eight cases. We conclude that BVDV-1a and BVDV-2b contribute significantly to disease and mortality in cattle in Uruguay. Future research should estimate the economic impact of BVDV in the Uruguayan livestock sector.


Subject(s)
Bovine Virus Diarrhea-Mucosal Disease/complications , Cattle Diseases/virology , Coinfection , Pestivirus , Animals , Antibodies, Protozoan , Antibodies, Viral , Bacteria/isolation & purification , Bovine Virus Diarrhea-Mucosal Disease/epidemiology , Bronchopneumonia/veterinary , Cattle , Cattle Diseases/epidemiology , Cattle Diseases/microbiology , Cattle Diseases/parasitology , Coccidia/isolation & purification , Coinfection/microbiology , Coinfection/parasitology , Communicable Diseases/complications , Communicable Diseases/epidemiology , Communicable Diseases/veterinary , Diarrhea Virus 1, Bovine Viral/genetics , Diarrhea Virus 1, Bovine Viral/immunology , Diarrhea Virus 1, Bovine Viral/isolation & purification , Diarrhea Virus 2, Bovine Viral/genetics , Diarrhea Virus 2, Bovine Viral/immunology , Diarrhea Virus 2, Bovine Viral/isolation & purification , Disease Outbreaks/veterinary , Female , Immunohistochemistry , Intestines/microbiology , Intestines/parasitology , Intestines/pathology , Intestines/virology , Lung/microbiology , Lung/pathology , Mortality , Neospora/immunology , Neospora/isolation & purification , Pasteurellaceae/isolation & purification , Pestivirus/genetics , Pestivirus/immunology , Pestivirus/isolation & purification , Pestivirus/pathogenicity , Pregnancy , Pregnancy Complications, Infectious/parasitology , Pregnancy Complications, Infectious/veterinary , Salmonella/isolation & purification , Sepsis/veterinary , Streptococcus/isolation & purification , Urinary Tract/microbiology , Urinary Tract/pathology , Uruguay/epidemiology
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