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Cell cultivation has been one of the most popular methods in research for decades. Currently, scientists routinely use two-dimensional (2D) and three-dimensional (3D) cell cultures of commercially available cell lines and primary cultures to study cellular behaviour, responses to stimuli, and interactions with their environment in a controlled laboratory setting. In recent years, 3D cultivation has gained more attention in modern biomedical research, mainly due to its numerous advantages compared to 2D cultures. One of the main goals where 3D culture models are used is the investigation of tumour diseases, in both animals and humans. The ability to simulate the tumour microenvironment and design 3D masses allows us to monitor all the processes that take place in tumour tissue created not only from cell lines but directly from the patient's tumour cells. One of the tumour types for which 3D culture methods are often used in research is the canine mammary gland tumour (CMT). The clinically similar profile of the CMT and breast tumours in humans makes the CMT a suitable model for studying the issue not only in animals but also in women.
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Neoplasias Mamárias Animais , Animais , Cães , Neoplasias Mamárias Animais/patologia , Feminino , Técnicas de Cultura de Células em Três Dimensões/métodos , Linhagem Celular Tumoral , Técnicas de Cultura de Células/métodos , Humanos , Modelos Biológicos , Microambiente TumoralRESUMO
In recent years, many studies have focused their attention on the dog as a proper animal model for human cancer. In dogs, mammary tumors develop spontaneously, involving a complex interplay between tumor cells and the immune system and revealing several molecular and clinical similarities to human breast cancer. In this review, we summarized the major features of canine mammary tumor, risk factors, and the most important biomarkers used for diagnosis and treatment. Traditional therapy of mammary tumors in dogs includes surgery, which is the first choice, followed by chemotherapy, radiotherapy, or hormonal therapy. However, these therapeutic strategies may not always be sufficient on their own; advancements in understanding cancer mechanisms and the development of innovative treatments offer hope for improved outcomes for oncologic patients. There is still a growing interest in the use of personalized medicine, which should play an irreplaceable role in the research not only in human cancer therapy, but also in veterinary oncology. Moreover, immunotherapy may represent a novel and promising therapeutic option in canine mammary cancers. The study of novel therapeutic approaches is essential for future research in both human and veterinary oncology.
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Neoplasias da Mama , Doenças do Cão , Neoplasias Mamárias Animais , Cães , Humanos , Animais , Feminino , Neoplasias Mamárias Animais/patologia , Neoplasias da Mama/patologia , Biomarcadores , Imunoterapia , Doenças do Cão/patologiaRESUMO
Microsporidia are unicellular obligate intracellular parasitic fungi that infect a wide range of vertebrates and invertebrates. There are two known species of microsporidia infecting honey bees in Slovakia- first Nosema apis and also Nosema ceranae. Our aim was to examine samples of honey bees collected from bee queen breeders in three ecoregions of the Slovak Republic in 2021 and 2022. First, microscopic diagnostics were used, and then randomly selected samples were examined using molecular methods. There were 4018 samples examined using microscopic diagnostics and the positivity was demonstrated in 922 samples. From the microscopically diagnosed positive samples, 507 samples were randomly selected, and using molecular methods, the positivity was proved in 488 samples. After sequencing the positive PCR products and comparing the sequences (BLAST) with the sequences stored in the gene bank, the Nosema ceranae species was detected in all positive samples.
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The aim of this study was to provide a beneficial treatment effect of mesenchymal stem cell products derived from the canine amniotic membrane (AM-MSC) on the complicated wound healing process in dogs. AM-MSCs were characterized in terms of morphology, phenotypic profile, and multilineage differentiation potential. The in vitro study of the effect of canine amniotic mesenchymal stem cell conditioned media (AMMSC-CM) on a primary skin fibroblast cell culture scratch assay showed a decrease in the measured scratch area of about 66.39% against the negative control (Dulbecco's Modified Eagle's Medium-32.55%) and the positive control (Dulbecco's Modified Eagle's Medium supplemented with FGF2, N2, B27, and EGF-82.077%) after 72 h treatment. In the experimental study, seven dogs with complicated nonhealing wounds were treated with a combination of antibiotics, NSAIDs, and local AMMSC-CM application. After 15 days of therapy, we observed a 98.47% reduction in the wound surface area as opposed to 57.135% in the control group treated by conventional therapy based on debridement of necrotic tissue, antibiotic therapy, pain management, and change of wound dressing.
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Âmnio , Células-Tronco Mesenquimais , Cães , Animais , Meios de Cultivo Condicionados/farmacologia , Meios de Cultivo Condicionados/metabolismo , Proliferação de Células , Cicatrização , Células-Tronco Mesenquimais/metabolismoRESUMO
Despite the fact that Cryptosporidium spp. is a parasite which commonly causes diarrhea, it still receives little attention. In our experiment, we focused on comparing the biological (N. davidi shrimp) and physical (zeolite with different thicknesses) possibility of filtering cryptosporidia from a small volume of water, which could contribute to increasing the catchability of this parasite. We monitored the ability to capture oocysts of the parasite Cryptosporidium parvum, genotype IIaA11G2R1, found in water samples. We infected drinking water with feces with a known number of cryptosporidial oocysts. One gram of sample contained ±28 oocysts. We filtered eight water samples with different concentrations of oocysts (0.1-2 g of infected stool per 15 L of water) using zeolite with a particle thickness of 0.2-0.6 mm and 0-0.3 mm. This was followed by purification, centrifugation and isolation utilizing the isolation kit AmpliSens® DNA-sorb-B, which is intended for stool. In total, 120 shrimp were divided into four aquariums (A, B, C, n = 30) including the control (K), while drinking water with the same parameters was infected with different concentrations of oocysts (A: 2.5 g, B: 2 g, C: 1 g of infected stool per 15 L of water). We took 10 individual shrimp and processed them in three time intervals (6 h, 12 h and 24 h). We processed them whole, and we isolated the DNA utilizing the isolation kit AmpliSens® DNA-sorb-AM, which is intended for tissues. Detection was carried out by molecular methods, namely the Nested PCR targeting of the region of the GP60 gene (60 kD glycoprotein). Gel electrophoresis showed the presence of C. parvum in seven zeolite-filtered water samples, and the parasite was not found in the water sample with the lowest number of oocysts filtered through the smaller-particle zeolite. There were 67 C. parvum-positive shrimp. Whereas the most positive shrimp were identified at 12 h of sampling, the least were identified at the 24 h mark. No shrimp positive for C. parvum was found in the control group. By sequencing, we confirmed the presence of C. parvum, genotype IIaA11G2R1, in all positive samples. We thus proved that the filtration capabilities of zeolite and N. davidi can be used for the rapid diagnosis of the presence of protozoa in a small amount of studied water.
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Criptosporidiose , Cryptosporidium parvum , Cryptosporidium , Água Potável , Zeolitas , Animais , Cryptosporidium/genética , Cryptosporidium parvum/genética , Fezes/parasitologia , Glicoproteínas , OocistosRESUMO
This retrospective study was undertaken on the records of intraluminal diameter of the trachea in 185 dogs, in which hypoplasia of the trachea had been suspected. The relative size of the trachea was measured using the tracheal diameter (TD), thoracic inlet distance (TI), thoracic tracheal diameter (TT) and the width of the third rib (3R), expressed as ratios TD:TI and TT:3R. Thirty-five dogs were diagnosed as having tracheal hypoplasia. Bulldogs and non-bulldog brachycephalic dogs had significantly smaller measured trachea diameters compared to the predicted values calculated on the basis of their body weight. Radiographs of each dog were investigated by four observers. Inter- and intra-observer reliability (ICCinter, ICCintra) was based on the measurements taken by four observers to evaluate the reproducibility of the protocol. There was a good ICCinter (0.8) and ICCintra (0.89) agreement. Craniocaudal tangential radiographs, centred on the cranial thoracic aperture, did not show a significant difference in tracheal diameter measurements compared to the right lateral radiographs. In conclusion, our findings indicate that bulldogs and non-bulldog brachycephalic dogs have smaller tracheal diameters than non-brachycephalic dogs.
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The aim of this study was to draw attention to the risk of transmission of Encephalitozoon, Cryptosporidium and Blastocystis infection due to high animal migration and to point out that even wild animals can be a source of many zoonotic diseases. Encephalitozoon cuniculi, Cryptosporidium spp. and Blastocystis spp. are frequent microscopic organisms that parasitise humans, domestic and wild animals. Two hundred and fifty-five faecal specimens were collected from wild boars, badgers, wolves, bears, foxes and deer from 15 locations in Slovakia. Sequencing of positive PCR products and subsequent sequence comparison with GenBank sequences identified Blastocystis spp. in five wild boars. The ST 5 (n = 4) and ST 10 (n = 1) subtypes were determined by genotyping. We identified Encephalitozoon cuniculi in five wild boars, and genotype II (n = 5) was determined on the basis of ITS repeat sequences. Cryptosporidium scrofarum was sequenced in wolves (n = 4) and wild boars (n = 1), while Cryptosporidium suis only in wild boars (n = 2). None of the wild boars had a mixed infection.
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Blastocystis spp. has been reported in wildlife, domestic animals and animals housed in ZOO. To-date, 17 genetically diverse lines have been reported in mammals and birds (designated ST) based on differences in the SSU rRNA. In this study, faeces samples were collected from 24 ZOO animals with clinical signs suggestive of gastrointestinal disease in Kosice ZOO, Slovakia. After DNA isolation, PCR was conducted to amplify the SSU region of DNA of Blastocystis species. Forward primer- Blast F and reverse primer- Blast R were used in the reaction. From 25 faeces samples, Blastocystis spp. was detected in 5 animals (3 mammals, 2 birds), with a prevalence of 20%. Subsequent molecular analyses identified the ST 5 (n = 3), ST 7 (n = 1), and ST 12 (n = 1) subtypes, where the ST 5 subtype was identified in the mammalian group and birds, and the ST 7 and ST 12 subtypes were identified only in mammals. Based on these findings, focusing on ZOO animals as a potential source of infection for humans is highly recommended.
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Infecções por Blastocystis , Blastocystis , Animais , Animais de Zoológico , Infecções por Blastocystis/veterinária , Europa (Continente) , Mamíferos , Filogenia , Eslováquia/epidemiologiaRESUMO
Nosematosis is currently a frequently discussed honey bee disease caused by two types of Microsporidia: Nosema apis and Nosema ceranae. Nosematosis as an intestinal disease caused by these species is one of the main factors associated with the weakening and loss of hives, with none of the stressors acting in isolation and all having an important synergistic or additive effect on the occurrence of parasitic infection. The most important factors are exposure to pesticides and nutritional stress, both worsening the immune response. Honey bees Apis mellifera become more susceptible to parasites and subsequently the disease manifests itself. Choosing the right laboratory diagnostics is important to determine the prevalence of both species. Our review summarizes the most commonly used methodologies, especially polymerase chain reaction (PCR), which is a reliable method for detecting nosematosis, as well as for distinguishing between the two species causing the disease.
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Blastocystis sp. is a single-cell microorganism occurring in the gastrointestinal tract of humans and various animals and is distributed worldwide. Blastocystis exhibits extensive genetic diversity of 28 subtypes (STs) based on the small subunit ribosomal RNA (SSU rRNA) gene. In this study, the genetic diversity and zoonotic potential of Blastocystis were evaluated using pig faecal samples from two farms in Slovakia. Blastocystis spp. were detected in pigs intended for distribution and consumption. ST 5 subtype was identified in all positive samples and age categories with a prevalence of 12%. However, the prevalence on one of the farms was up to 28.6%. This is the first study of Blastocystis in pigs carried out in Slovakia. Although a number of samples obtained was small, the identified subtype of ST5 Blastocystis sp. occurs in humans and animals. It may have zoonotic potential and therefore may be a risk factor due to the close contact between humans and pigs on the breeding farms.
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Infecções por Blastocystis/veterinária , Doenças dos Suínos/epidemiologia , Animais , Infecções por Blastocystis/diagnóstico , Infecções por Blastocystis/epidemiologia , Infecções por Blastocystis/parasitologia , Prevalência , Eslováquia/epidemiologia , Sus scrofa , Suínos , Doenças dos Suínos/diagnóstico , Doenças dos Suínos/parasitologiaRESUMO
Microsporidia are obligate intracellular pathogens that are currently considered to be most directly aligned with fungi. These fungal-related microbes cause infections in every major group of animals, both vertebrate and invertebrate, and more recently, because of AIDS, they have been identified as significant opportunistic parasites in man. The Microsporidia are ubiquitous parasites in the animal kingdom but, until recently, they have maintained relative anonymity because of the specialized nature of pathology researchers. Diagnosis of microsporidia infection from stool examination is possible and has replaced biopsy as the initial diagnostic procedure in many laboratories. These staining techniques can be difficult, however, due to the small size of the spores. The specific identification of microsporidian species has classically depended on ultrastructural examination. With the cloning of the rRNA genes from the human pathogenic microsporidia it has been possible to apply polymerase chain reaction (PCR) techniques for the diagnosis of microsporidial infection at the species and genotype level. The absence of genetic techniques for manipulating microsporidia and their complicated diagnosis hampered research. This study should provide basic insights into the development of diagnostics and the pitfalls of molecular identification of these ubiquitous intracellular pathogens that can be integrated into studies aimed at treating or controlling microsporidiosis.
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The aim of our study was to determine species and genotypes of Cryptosporidium in patients suffering from immunosuppressive illnesses, but also in immunocompetent patients suffering from diarrhoea. A total of 80 samples of faeces were collected from both immunosuppressed and immunocompetent patients. The immunosuppressed patients (65 samples) - 35 adult patients (group A) and 30 children (group B) were hospitalized at the Clinic of Oncohemathology. Samples from immunocompetent humans (15 samples, group C) were taken from patients with clinical signs of acute diarrhoea. With the use of molecular methods targeting the 60 kDa glycoprotein (GP60) gene region, we have identified multiple genotypes of Cryptosporidium. parvum and Cryptosporidium. hominis in immunocompromised, but also in immunocompetent individuals (C. hominis IbA10G2, IeA12G3T3; C. parvum IIaA10G1R1, IIaA11G2R1, IIaA12G2R1, IIaA13G1R1, IIaA14G1R1, IIaA14G2R1, IIaA17G1R1 and IIaA18G1R1). This is the first report of the occurrence of genotypes IIaA10G1R1, IIa12G2R1 and IIaA18G1R1 in human hosts.
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Criptosporidiose/imunologia , Cryptosporidium parvum/isolamento & purificação , Diarreia/imunologia , Hospedeiro Imunocomprometido/imunologia , Adolescente , Adulto , Criança , Pré-Escolar , Cryptosporidium parvum/genética , Genótipo , Humanos , Imunocompetência , Pessoa de Meia-Idade , Eslováquia , Adulto JovemRESUMO
OBJECTIVE: In recent years new infectious diseases, i.e. emerging or re-emerging diseases, have been coming to the forefront. Currently, microsporidia, considered to be a major cause of emerging and opportunistic infections particularly in immunocompromised individuals, are also included in this group. Therefore, the aim of our study was to map the prevalence of Encephalitozoon intestinalis and Enterocytozoon bieneusi infection in a group of patients and to compare it with the occurrence of specific antigens in immunocompetent people. METHODS: Detection of spores of both pathogens in faecal samples was performed by an immunofluorescence test using species-specific monoclonal antibodies. RESULTS: Positivity to E. intestinalis in 91 examined immunosuppressed patients reached 33% (30/91), while only 4.3% (3/70) of the control group samples were found to be positive (relative risk 7.7, p < 0.001). In case of E. bieneusi 14.3% (13/91) of immunocompromised patients were positive, as were 5.7% (4/70) of people from the control group (relative risk 2.5, p = 0.095). CONCLUSION: In case of development of any opportunistic infection, the infection is detected and removed in most cases at an early stage. The incidence of clinically manifested microsporidiosis in patients with immunodeficiency is rare as they are under constant medical supervision. However, we must not forget about opportunistic infections, and in case of any non-specific symptoms it is necessary to exclude or confirm the diagnosis for immediate treatment.
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Encephalitozoon/isolamento & purificação , Encefalitozoonose/diagnóstico , Enterocytozoon/isolamento & purificação , Hospedeiro Imunocomprometido , Programas de Rastreamento , Microsporidiose/diagnóstico , Infecções Oportunistas/diagnóstico , Encefalitozoonose/epidemiologia , Fezes/microbiologia , Humanos , Microsporidiose/epidemiologia , Infecções Oportunistas/microbiologia , Eslováquia/epidemiologiaRESUMO
Enterocytozoon bieneusi is characterized as a ubiquitous intestinal parasite with a wide genetic diversity, and it is capable of infecting a diverse range of hosts all around the world. Since information about the genotype diversity of E. bieneusi in pigs, calves, sheep and goats in Slovakia is very limited, we examined three farms where we mapped the occurrence of E. bieneusi and its genotypes, thus contributing to the information about geographic diversity of this pathogen worldwide. In this study we used PCR methods to examine 253 fecal samples from pigs, calves, sheep and goats with suspected microsporidiosis. Real time PCR was used to identify genotypes by amplification of SSU region and ITS region. After analysis we detected presence of E. bieneusi (7) and Microsporidia sp. (6) in 13 samples. The analysis of nucleotide sequences of ITS region of E. bieneusi shows, that the positive isolates belonged to 5 genotypes, including two known genotypes (I, F) and three new genotypes diagnosed in pigs, named SVK-S1, SVK-S2 and SVK-S3. Phylogenetic analysis showed that these novel genotypes identified in present study belong to group 1, which previously has been described as a zoonotic group. Genotype I was detected in two calves and genotype F was detected in two pigs.
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Enterocytozoon/genética , Fezes/microbiologia , Cabras/microbiologia , Microsporidiose/epidemiologia , Animais , Sequência de Bases , China/epidemiologia , Variação Genética , Genótipo , Filogenia , Reação em Cadeia da Polimerase , Prevalência , Ovinos , Eslováquia/epidemiologia , SuínosRESUMO
INTRODUCTION: Chlamydia psittaci is an obligate intracellular Gram-negative bacterium causing respiratory disease (chlamydiosis) or asymptomatic carriage in poultry. In humans, it is a zoonotic agent of ornithosis/psittacosis. Due to low awareness of the disease and variable clinical presentation, psittacosis is often remains unrecognised as such by general practitioners. Zoonotic transfer occurs through inhalation of contaminated aerosols, and originates from feathers, faecal material and respiratory tract exudates. OBJECTIVE: The aim of this study was to investigate chickens for the presence of Chlamydia sp. from pharyngeal and cloacal swabs and review the zoonotic risk for humans. MATERIAL AND METHODS: 138 clinically healthy chickens from farms in Slovakia were examined for the presence of Chlamydia sp. The age of the chickens was 6 months. Two different samples were used - pharyngeal swabs and cloacal swabs. Each sample was examined by the molecular PCR method, and in the case of a positive result the identity of the obtained sequences was examined by a BLAST search. RESULTS: Of the total number of 276 examined samples from 138 chickens, 19 (6.9%) showed positivity for C. psittaci infection, 12 (8.7%) which were positive from pharyngeal swabs and 7 (5.1%) from cloacal swabs. None of the chickens were positive in both samples. Phylogenetic examination of the 19 isolates identified in the study, based on the 23S rRNA gene sequence, revealed that the isolates obtained were identical with C. psittaci, and genetically very close to genotypes B and genotype E. CONCLUSIONS: C. psittaci infections are apparently emerging in chickens. Chicken-processing plant employees should be considered a risk group for human psittacosis. There is a need for higher awareness and for efficient risk assessment and management.
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Chlamydophila psittaci/isolamento & purificação , Doenças das Aves Domésticas/microbiologia , Psitacose/microbiologia , Psitacose/veterinária , Zoonoses/microbiologia , Animais , Galinhas/microbiologia , Chlamydophila psittaci/classificação , Chlamydophila psittaci/genética , Genótipo , Humanos , Filogenia , Psitacose/transmissão , Eslováquia , Zoonoses/transmissãoRESUMO
The study was conducted to compare the specificity of immunological diagnostic methods used for the diagnosis of Cryptosporidium species capable of causing life-threatening infection in both immunosuppressed and immunocompetent patients. For the detection of Cryptosporidium species in 79 animals with diarrhoea, we used three Copro-antigen tests: RIDASCREEN®Cryptosporidium test, Cryptosporidium 2nd Generation (ELISA) and RIDA®QUICK Cryptosporidium. For immunoassays we used positive and negative samples detected by means of polymerase chain reaction and validated by sequencing and nested polymerase chain reaction to confirm the presence six different species of Cryptosporidium species. Prevalence of cryptosporidiosis in the entire group determined by enzyme immunoassay, enzyme linked immunosorbent assay, immuno-chromatographic test and polymerase chain reaction was 34.17%, 27.84%, 6.33% and 27.84%, respectively. Sensitivity of animal samples with enzyme immunoassay, enzyme linked immunosorbent assay, and immuno-chromatographic test was 63.6%, 40.9% and 22.7%, resp., when questionable samples were considered positive, whereas specificity of enzyme immunoassay, enzyme linked immunosorbent assay and immuno-chromatographic test was 75.9%, 78.9% and 100%, respectively. Positive predictive values and negative predictive values were different for all the tests. These differences results are controversial and therefore reliability and reproducibility of immunoassays as the only diagnostic method is questionable. The use of various Cryptosporidium species in diagnosis based on immunological testing and different results obtained by individual tests indicate potential differences in Copro-antigens produced by individual Cryptosporidium species.
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Criptosporidiose/microbiologia , Cryptosporidium/isolamento & purificação , Diarreia/veterinária , Testes Imunológicos/métodos , Animais , Criptosporidiose/diagnóstico , Cryptosporidium/genética , Cryptosporidium/imunologia , Diarreia/diagnóstico , Diarreia/microbiologia , Testes Imunológicos/economia , Testes Imunológicos/veterinária , Sensibilidade e EspecificidadeRESUMO
Cryptosporidium spp. is an important causative agent of intestinal parasitoses-induced diarrhoea in humans and animals worldwide. Rodents (small mammals), the main reservoir of infections, are globally expanded and overpopulated, which increases the risk of transfer of human and zoonotic pathogens from the genus Cryptosporidium. In this study, Cryptosporidium was detected in wild immunocompetent asymptomatic small mammals. Altogether 262 fecal samples were collected from five areas in Eastern Slovakia from four different rodent species (Myodes glareolus, Apodemus agrarius, Apodemus flavicollis, Rattus norvegicus), eight samples originated from two insectivore species (Sorex araneus, Crocidura suaveolens), and two sample from a carnivore Mustela nivalis. The samples were examined using a method modified in our laboratory, based on the use of specific primers on a small subunit rRNA (18S rRNA) gene for species identification, and amplification of GP60 gene coding 60-kDa glycoprotein for genotype determination. The following species were identified: Cryptosporidium parvum (n=15), genotypes IIaA18G3R1 (n=11; KU311673), IIaA10G1R1 (n=1; KU311670), IIcA5G3a (n=1; KU311669), IIiA10 (n=2; KU311672); Cryptosporidium suis (n=4; KU311671); Cryptosporidium scrofarum (n=28); Cryptosporidium environment sp. (n=12; KU311677); Cryptosporidium muskrat genotype I (n=3; KU311675); Cryptosporidium muskrat genotype II (n=3; KU311676). From one of the rodent, the species Cryptosporidium hominis genotype IbA10G2 (KU311668) was identified for the first time. The results of this study indicate low host specificity of the detected Cryptosporidium species and imply the importance of free-living small mammals in urban and suburban habitats as a potential source of human cryptosporidiosis.
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Criptosporidiose/genética , Cryptosporidium/genética , Cryptosporidium/isolamento & purificação , Ratos/microbiologia , Animais , Cryptosporidium parvum/genética , Primers do DNA , Europa (Continente) , Fezes/microbiologia , Genótipo , Humanos , RNA RibossômicoRESUMO
INTRODUCTION: In this study we examined 200 faecal samples from pigs and calves with suspected cryptosporidiosis were examined by the PCR methods: nested PCR for amplification of SSU region; nested PCR for amplification of GP60 region; and with restriction analysis of DNA (PCR-RFLP). The sequencing identified the following species: Cryptosporidium muris (2), Cryptosporidium andersoni (1), Cryptosporidium bovis (4), Cryptosporidium suis (2), Cryptosporidium scrofarum (10), mixed infection caused by C. scrofarum and C. muris (1),and Cryptosporidium parvum (10) genotype A subtype IIaA17G2R1. RESULTS AND CONCLUSIONS: The findings suggest that livestock can be an important source of zoonotic species or genotypes of Cryptosporidium, which may adversely affect the public health of human populations. This is the first time in our country that the Cryptosporidium species has been identified in livestock in Slovakia. The identification and genotyping of this pathogen in Slovakia, completes the epidemiological situation in Europe for Cryptosporidum species.
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Doenças dos Bovinos/epidemiologia , Criptosporidiose/epidemiologia , Cryptosporidium/genética , Doenças dos Suínos/epidemiologia , Animais , Bovinos , Doenças dos Bovinos/parasitologia , Criptosporidiose/parasitologia , Fezes/parasitologia , Reação em Cadeia da Polimerase/veterinária , Polimorfismo de Fragmento de Restrição , Proteínas de Protozoários/genética , Análise de Sequência de DNA/veterinária , Eslováquia/epidemiologia , Sus scrofa , Suínos , Doenças dos Suínos/parasitologiaRESUMO
INTRODUCTION AND OBJECTIVES: Chlamydia psittaci, an obligate intracellular bacterium, which is the etiologic agent of avian chlamydiosis in birds and ornithosis/psittacosis in humans, has been reported to be one of the most common pathogens found in feral pigeons worldwide, and thus constitutes a zoonotic risk. The aim of the study was to investigate pigeons in Slovakia living in areas in close proximity to humans for the presence of C. psittaci, using pharyngeal and cloacal swabs. MATERIAL AND METHODS: 122 clinically healthy pigeons from different geographical regions of Slovakia were examined for the presence of C. psittaci. The adult pigeons of both genders were captured during the summer period in the urban centres of Slovakian towns. Each sample was examined by molecular method PCR, and in the case of positive result the identity of the obtained sequence was examined by a BLAST search. RESULTS: Of the total number of 244 examined samples, 14 (5.7%) showed positivity for C. psittaci infection, 5 of which were from pharyngeal swabs (4.1%) and 9 from cloacal swabs (7.4%). A positive result was detected in 13 pigeons (10.7%). Phylogenetic analysis showed that all the positive samples are genetically very close to genotypes B and genotype E. CONCLUSION: Phylogenetic examination of the 14 isolates of C. psittaci identified in the presented study, based on 23S rRNA gene sequence, revealed their close relationship with C. psittaci genotypes B and E. Both genotypes are predominantly prevalent in pigeons and both can be transmitted to humans. Therefore, it is necessary to perform screening examinations of animals and analyse the epidemiological factors affecting the way of transmission and circulation of pathogen.
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Doenças das Aves/epidemiologia , Chlamydophila psittaci/isolamento & purificação , Columbidae , Psitacose/veterinária , Animais , Doenças das Aves/microbiologia , Cloaca/microbiologia , Genótipo , Faringe/microbiologia , Filogenia , Reação em Cadeia da Polimerase/veterinária , Prevalência , Psitacose/epidemiologia , Psitacose/microbiologia , RNA Ribossômico 23S/genética , Análise de Sequência de DNA/veterinária , Eslováquia/epidemiologia , ZoonosesRESUMO
In our study, we examined 91 fecal samples from five different groups of people containing HIV patients, hemodialysis patients, kidney transplant recipients, immunocompetent humans without clinical signs, and humans with suspected cryptosporidiosis. The purpose of our study was to determine species and genotype composition of representatives of Cryptosporidium spp. using PCR analysis of small subunit ribosomal RNA gene and 60-kDa glycoprotein gene and examine their phylogenetic relationship. In HIV-positive/AIDS-infected group of patients and in hemodialysis patients, no presence of Cryptosporidium species was detected. In two kidney transplant recipients, we detected species/genotypes Cryptosporidium parvum IIaA13G1T1R1 (KT355488) and Cryptosporidium hominis IaA11G2R8 (KT355489) and in two immunocompetent patients with clinical symptoms, we identified Cryptosporidium muris and C. hominis IbA10G2T1 (KT355490). In the group of healthy immunocompetent individuals without clinical signs, we identified species/genotype C. hominis IbA11G2 (KT355491) in one sample.