Antimicrobial Use in Pig Farms in the Midwestern Region of Minas Gerais, Brazil.

The use of antimicrobials in swine production is an issue that concerns the whole world due to their impact on animal and public health. This study aimed to verify the antimicrobial use in 29 commercial full-cycle farms in the midwestern region of the state of Minas Gerais, since this region is a hub of intensive pig farming in Brazil, as well as the possible correlations between the use of antimicrobials, biosecurity, and productivity. A total of 28 different drugs used for preventive purposes were described. On average, the herds used seven drugs, exposing the piglets for 116 days and totaling 434.17 mg of antimicrobials per kilogram of pig produced. Just eight active ingredients made up 77.5% of the total number of drugs used on the studied herds. Significant differences were found between the variables, biosecurity score and number of sows, antimicrobial amount and number of drugs, number of drugs and number of sows, and between productivity and biosecurity scores. The use of antimicrobials was considered excessive in the swine farms in the state of Minas Gerais compared to what was reported in Brazil and in other countries. Educational measures and better control should be proposed to reduce the preventive use of antimicrobials.

The Impact of Physical Effort on the Gut Microbiota of Long-Distance Fliers.

Flying pigeons (Columbia livia) are extensively studied for their physical endurance and superior sense of orientation. The extreme physical endurance of which these birds are capable creates a unique opportunity to investigate the possible impact of long-distance flying on the taxonomy and metabolic function of the gut microbiota. This project was enabled by access to two groups of pigeons raised by the same breeder in the same conditions, except that one group was trained in long-distance flying and participated in multiple races covering a total distance of over 2600 km over a 9-week period. In contrast, the second group did not fly. The fecal microbiota was analyzed using 16S amplicon sequencing, and the taxonomy and metabolic function were inferred from this sequence data. Based on phylogenetic distance and metabolic function, flying and non-flying pigeons were found to harbor distinct bacterial microbiota. The microbiota taxonomy varied extensively between the birds, whereas the inferred metabolic potential was relatively stable. Age was not a significant determinant of the fecal microbiota profile. In flying birds, the metabolic pathways annotated with biosynthesis were enriched, representing 60% of the 20 metabolic pathways that were most closely associated with flying.

Cryptosporidium proventriculi in Captive Cockatiels (Nymphicus hollandicus).

Cockatiels (Nymphicus hollandicus) are among the most commonly sold psittacines pets. The aim of this study was to evaluate the occurrence of Cryptosporidium spp. in domestic N. hollandicus and identify risk factors for this infection. We collected fecal samples from 100 domestic cockatiels in the city of Araçatuba, São Paulo, Brazil. Feces from birds of both genders and older than two months were collected. Owners were asked to complete a questionnaire to identify how they handle and care for their birds. Based on nested PCR targeting the 18S rRNA gene, the prevalence of Cryptosporidium spp. in the cockatiels sampled was 9.00%, 6.00% based on Malachite green staining, 5.00% based on modified Kinyoun straining, and 7.00% when the Malachite green was combined with Kinyoun. Applying multivariate logistic regression to test the association between Cryptosporidium proventriculi positivity and potential predictors showed that gastrointestinal alterations was a significant predictor (p < 0.01). Amplicons from five samples were sequenced successfully and showed 100% similarity with C. proventriculi. In summary, this study demonstrates the occurrence of C. proventriculi in captive cockatiels.

Giardiasis in children and dogs, and the first report of assemblage E in dogs from northeastern Brazil.

Diagnosis is crucial for controlling giardiasis. We determined the prevalence and genetically characterize isolates of Giardia duodenalis of children and dogs from rural communities in northeastern Brazil. G. duodenalis cysts were concentrated by centrifugal flotation/sedimentation. Molecular characterization was carried out using the loci ssu-rRNA, bg, tpi, and gdh. By parasitological techniques, Giardia spp. infection was detected in 72/192 children (37.5%; 95% CI: 30.6%-44.7%) and 24/139 dogs (17.3%; 95% CI: 11.4%-24.6%). By molecular analysis, infection was detected in 60/141 children (42.5%; 95% CI: 34.3%-51.2%) and 26/92 dogs (28.3%; 95% CI: 19.4%-38.6%). The total prevalence of giardiasis was 54.9% in children (106/193; 95% CI: 47.1%-61.6%) and 32.9% in dogs (47/143; 95% CI: 25.2%-41.2%). Zoonotic assemblages A and B of G. duodenalis were detected in children, and assemblage E of G. duodenalis was detected in one child and two dogs. Parallel use of parasitological and molecular techniques proved to be a more effective strategy for detecting giardiasis in children and dogs from endemic areas.

Giardiasis in children and dogs, and the first report of assemblage E in dogs from northeastern Brazil / Giardíase em crianças e cães, e o primeiro relato de infecção por assemblage E em cães do nordeste brasileiro

Diagnosis is crucial for controlling giardiasis. We determined the prevalence and genetically characterize isolates of Giardia duodenalis of children and dogs from rural communities in northeastern Brazil. G. duodenalis cysts were concentrated by centrifugal flotation/sedimentation. Molecular characterization was carried out using the loci ssu-rRNA, bg, tpi, and gdh. By parasitological techniques, Giardia spp. infection was detected in 72/192 children (37.5%; 95% CI: 30.6%-44.7%) and 24/139 dogs (17.3%; 95% CI: 11.4%-24.6%). By molecular analysis, infection was detected in 60/141 children (42.5%; 95% CI: 34.3%-51.2%) and 26/92 dogs (28.3%; 95% CI: 19.4%-38.6%). The total prevalence of giardiasis was 54.9% in children (106/193; 95% CI: 47.1%-61.6%) and 32.9% in dogs (47/143; 95% CI: 25.2%-41.2%). Zoonotic assemblages A and B of G. duodenalis were detected in children, and assemblage E of G. duodenalis was detected in one child and two dogs. Parallel use of parasitological and molecular techniques proved to be a more effective strategy for detecting giardiasis in children and dogs from endemic areas.(AU)

O diagnóstico é crucial para o controle da giardíase. Foram determinadas as prevalências e as características genéticas isoladas de Giardia duodenalis, em crianças e cães de comunidades rurais do nordeste brasileiro. Os cistos de G. duodenalis foram concentrados por centrífugo-flutuação/sedimentação. A caracterização molecular foi realizada utilizando-se os loci ssu-rRNA, bg, tpi e gdh. Pelas técnicas parasitológicas, a infecção por Giardia spp. foi detectada em 72/192 crianças (37,5%; IC 95%: 30,6%-44,7%) e 24/139 cães (17,3%; IC 95%: 11,4%-24,6%). Molecularmente, a infecção foi detectada em 60/141 crianças (42,5%; IC 95%: 34,3%-51,2%) e 26/92 cães (28,3%; IC 95%: 19,4%-38,6%). A prevalência total de giardíase foi de 54,9% em crianças (106/193; IC 95%: 47,1%-61,6%) e 32,9% em cães (47/143; IC 95%: 25,2%-41,2%). Os assemblages zoonóticos A e B de G. duodenalis foram detectados em crianças, e o assemblage E de G. duodenalis foi detectado nas duas populações. O uso paralelo de técnicas parasitológicas e moleculares mostra-se uma estratégia mais eficaz para detecção de giardíase em crianças e cães de áreas endêmicas.(AU)

Canine visceral leishmaniasis and Rhipicephalus sanguineus: evaluation and comparison of classical techniques.

The aim of this study was evaluating the association and correlation between the diagnostics tests used for Leishmania spp. detection in dogs and ticks. We evaluated 99 dogs and 990 Rhipicephalus sanguineus. In dogs, we used bone marrow aspirates and lymph node fine-needle aspiration biopsy (FNAB) for direct parasitological examinations and real time-polymerase chain reaction (RT-PCR) and collected blood samples for enzyme-linked immunosorbent assays (ELISA). In ticks, two laboratory techniques [immunohistochemistry to lipophosphoglycan (IHC) and RT-PCR] were performed in the intestine, ovaries and salivary glands. With respect to the measurement of diagnostic performance in dogs, lymph node RT-PCR proved to be the best test followed by ELISA and bone marrow RT-PCR. In ticks, intestine IHC were considered as a gold standard for diagnosis of leishmaniasis with intestinal RT-PCR being the best diagnostic test. To arrive at the correlation between laboratory techniques for dogs and their ticks, we evaluated the diagnostic test used for dogs with tests performed in R. sanguineus, which used lymph node FNAB as the gold standard. The intestine IHC technique showed strongest association. We demonstrated that the best tissue for Leishmania spp. detection in dogs was the lymph node and the intestine in case of ticks. As for laboratory techniques, the isolated analysis of each species presented a strong agreement between immunohistochemistry and RT-PCR when compared to its gold standard. In addition, we concluded that the immunohistochemistry of ticks' intestines was a better technique for diagnosing Leishmania spp. in R. sanguineus, thereby showing almost perfect correlation with the lymph node FNAB.

FIRST REPORT OF GENUS Cryptosporidium IN CERVIDS SPECIES: Mazama americana, Mazama nana AND Blastocerus dichotomus.

We analyzed Cryptosporidium spp. in fecal samples of wild cervids (Ozotoceros bezoarticus, Blastocerus dichotomus, Mazama nana, Mazama americana, and Mazama bororo) from many Brazilian regions, a fact unprecedented in the literature. Sniffer dogs were used to collect 936 fecal samples of cervids from 14 Brazilian localities. Cervids species were identified using polymerase chain reaction (PCR) performed from genomic DNA extracted from 563 fecal samples of Ozotoceros bezoarticus, Blastocerus dichotomus, Mazama nana, Mazama americana, and Mazama bororo. Cryptosporidium spp. oocyst screening was performed using malachite green negative staining. Nested PCR (nPCR) protocols targeting the 18S rRNA and GP60 genes followed by genetic sequencing were performed for Cryptosporidium spp. detection and Cryptosporidium parvum subtyping, respectively. Nested PCR targeting actin gene and genetic sequencing were performed in samples with non-identified Cryptosporidium species by 18S rRNA amplicon sequencing. The association between the occurrence of Cryptosporidium and the presence of bovines in the same locality was evaluated using Fisher's exact test. The positivity rates of diagnostic methods were compared by McNemar test and the Kappa correlation coefficient. The prevalence rates of Cryptosporidium spp. in cervids were 1.42% (8/563) and 0.36% (2/563) by nPCR and malachite green negative staining, respectively. C. parvum IIaA16G3R1 isolate was identified in three fecal samples from M. americana, two from M. nana and one from B. dichotomus. Cryptosporidium ryanae were found in one sample from B. dichotomus. We identified a new Cryptosporidium genotype, named Cryptosporidium deer genotype BR, from one M. americana fecal sample.

Detection of Cryptosporidium spp. and Giardia duodenalis in small wild mammals in northeastern Brazil.

This study investigated the occurrence of Giardia duodenalis and Cryptosporidium spp. in rodents and marsupials from the Atlantic Forest in southern Bahia, northeastern Brazil. Two hundred and four fecal samples were collected from different forest areas in the municipalities of Ilhéus, Una, Belmonte, and Mascote. Identifications were performed using PCR and nested PCR followed by sequencing of the gdh and tpi genes for G. duodenalis, and the gp60 and Hsp-70 genes for Cryptosporidium. The total frequency of positive PCR samples for both G. duodenalis and Cryptosporidium spp. was 5.4% (11/204). Giardia duodenalis occurred in 2.94% (4/136) of rodents and 2.94% (2/68) of marsupials. The prevalence of Cryptosporidium in rodents and marsupials was 1.47% (2/136) and 4.41% (3/68), respectively. In the areas sampled, the frequency of parasitism was 50% (7/14), while the Mascote region alone had no parasitized animals. The G. duodenalis subgenotype AI was identified in the rodent species Hylaeamys laticeps, Oecomys catherinae, Oligoryzomys nigripes and Akodon cursor, and in the marsupials Gracilinanus agilis and Monodelphis americana. In the rodents Rhipidomys mastacalis, H. laticeps and in the marsupial Marmosa murina the protozoa Cryptosporidium fayeri, Cryptosporidium parvum and Cryptosporidium ubiquitum with subtypes IIa and IVg by the gp60 gene were found. In conclusion, this study provides the genetic characterization of Giardia and Cryptosporidium species and genotypes in rodents and marsupials. And, these findings reinforce that the rodent and marsupial species mentioned above play a role as new hosts for Giardia and Cryptosporidium.

Cryptosporidium parvum in brown brocket (Mazama gouazoubira) from Brazil: First report of the subtype IIaA16G3R1 in cervids.

This research had as objective to evaluate the occurrence and to characterize genetically the infections by Cryptosporidium in Mazama gouazoubira. By a non-invasive harvest methodology using trained sniffer dogs to locate fecal samples of cervids, 642 fecal samples were obtained from six Brazilian localities. The cervids species responsible for the excretion of each fecal sample were identified by the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), using the mitochondrial cytochrome b target gene (cyst b) and the restriction enzymes Sspl, AflIII and BstN. From this identification, 437 fecal samples of M. gouazoubira were selected for research of Cryptosporidium spp. performed through negative staining with malachite green and polymerase chain reaction (nPCR), with the subunit of 18S rRNA gene, followed by sequencing the amplified products. In the samples that were diagnosed the presence of parasite species with zoonotic potential, genotyping was also performed using nPCR with the subunit of GP60 gene. Statistical analysis consisted of the Fisher exact test to verify the association of the presence of the enteroparasite in relation to the presence of cattle in each locality, and the McNemar tests and Kappa correlation coefficient used to compare the results obtained between the two diagnostic techniques. In the fecal samples of M. gouazoubira the occurrences of Cryptosporidium were diagnosed in 1.6% (7/437) and 1.1% (5/437), respectively, through nPCR and microscopy. Cryptosporidium. parvum was diagnosed in 100% (7/7) of the samples submitted to sequencing (18S gene). The IIaA16G3R1 subtype was diagnosed in five of the C. parvum samples submitted to genotyping (GP60 gene). This is the first world report of C. parvum in M. gouazoubira and subtype IIaA16G3R1 in cervids.

Enteric parasitic infections in children and dogs in resource-poor communities in northeastern Brazil: Identifying priority prevention and control areas.

The aim of this study was to determine the prevalence and risk factors of the main enteric parasitic infections that affect children and dogs in the municipality of Ilhéus, Bahia, Brazil; and to identify the geopolitical areas that should receive priority interventions to combat them. Between March and November 2016, fecal samples of 143 dogs and 193 children aged 1 month to 5 years were collected in 40 rural and semirural communities using a systematic sampling approach, stratified by district. Samples were collected by legal guardians of the children and / or dog owners. Eggs, larvae, cysts and oocysts of parasites were concentrated by centrifugal-flotation and centrifugal-sedimentation, and acid-resistant staining was used to visualize parasites. One hundred and thirty-two children (68.4%), 111 dogs (77.6%) and 199 (73.7%) dog fecal samples collected from streets were parasitized. Giardiasis, cryptosporidiosis, amoeba infections and hookworm were the most frequent infections in all studied populations, in addition to trichuriasis in dogs and ascaridiasis in children. A predominance of Giardia and hookworms was observed in children and dogs, respectively. The coastal districts of Aritaguá, Olivença and the main district had a higher parasitic diversity and overlapping of important potential zoonotic infections. Age over one year (p<0.001), adjusted OR = 3.65; 95% CI = 1.86-7.16) and income below the minimum monthly salary (p = 0.02, adjusted OR = 2.78, 95% CI = 1.17-6.59) were the main factors associated with intestinal parasitic infections in children and dogs, respectively. The coastal districts of Aritaguá and Olivença and the main district should be prioritized through enteric disease control programs, and the factors associated with infections must be considered in the design of health interventions in these districts. The integration between affirmative income actions and investments to improve the health infrastructure of these communities may work more effectively than current preventive measures to combat enteric parasites.

TF-Test Quantified: a new technique for diagnosis of Schistosoma mansoni eggs.

OBJECTIVES: Laboratory diagnosis of Schistosoma mansoni eggs is routinely performed by conventional quantitative techniques through the parasitological examination of human faeces. However, the diagnostic sensitivity of this type of exam varies from low to moderate. We aimed to develop a new parasitological technique called TF-Test Quantified (TFT-Quant), for the quantitative detection of S. mansoni eggs in human faeces. METHODS: Four study stages were performed using 43 mice infected by S. mansoni cercariae. These experiments allowed the definition of an operational protocol for TFT-Quant and a comparison of this new technique to the conventional Helm-Teste technique. RESULTS: The results show a good diagnostic efficacy of TFT-Quant, which reached 100% in sensitivity and specificity, indicating an 'Almost Perfect' Kappa (k) agreement. CONCLUSIONS: This new technique provided a quantitative gain in the detection of S. mansoni eggs, largely free of faecal debris. The next stage of this study is the field validation of the TFT-Quant technique with the use of human faecal samples from an endemic region for mansonic schistosomiasis in Brazil (Microregion Jequitinhonha, State of Minas Gerais). In parallel to this validation, computational algorithms will be developed to allow the automated quantitative diagnosis of S. mansoni eggs.

OBJECTIFS: Le diagnostic en laboratoire des œufs de Schistosoma mansoni est systématiquement effectué à l'aide de techniques quantitatives conventionnelles faisant appel à l'examen parasitologique de selles humaines. Cependant, la sensibilité diagnostique de ce type d'examen varie de faible à modérée. Nous avons voulu développer une nouvelle technique parasitologique appelée TF-Test Quantified (TFT-Quant), pour la détection quantitative des œufs de S. mansoni dans les selles humaines. MÉTHODES: Quatre étapes de l'étude ont été réalisées sur 43 souris infectées par des cercaires de S. mansoni. Ces expériences ont permis de définir un protocole opérationnel pour TFT-Quant et de comparer cette nouvelle technique à la technique classique Helm-Teste. RÉSULTATS: Les résultats montrent une bonne efficacité diagnostique de TFT-Quant, dont la sensibilité et la spécificité ont atteint 100%, ce qui indique une concordance kappa (k) «presque parfaite¼. CONCLUSIONS: Cette nouvelle technique a permis un gain quantitatif dans la détection des œufs de S. mansoni, largement exempts de débris fécaux. La prochaine étape de cette étude est la validation sur le terrain de la technique TFT-Quant avec l'utilisation d'échantillons de selles humaines provenant d'une région endémique pour la schistosomiase mansonique au Brésil (Microregion Jequitinhonha, dans l'Etat de Minas Gerais). Parallèlement à cette validation, des algorithmes informatiques de calcul seront développés pour permettre le diagnostic quantitatif automatisé des œufs de S. mansoni.

Molecular characterization of Cryptosporidium in calves from rural settlements in the Northwest region of the state of São Paulo, Brazil / Caracterização molecular de Cryptosporidium em bezerros de assentamentos rurais da região Noroeste do estado de São Paulo, Brasil

The study was conducted on 25 properties of the settlements São José I and Salvador, located in the municipalities of Brejo Alegre and Birigui, in the State of São Paulo, Brazil. A record of variables was elaborated and included data such as gender, breed and age of the animals. A total of 231 stool samples were collected from bovines aged one to six months, 128 being females and 103 males, 131 crossbred and 100 Holstein. Among the 231 samples, 17 (7.36%) were positive for Cryptosporidium spp. both by malachite green negative staining and by nested-PCR. Of the 17 positive samples, 14 were sequenced in agarose gel. These sequences were detected between 99% and 100% of genetic similarity for the following species. One sequence was similar to C. parvum (AB513880.1), one to C. bovis (MF074602.1), two to C. ryanae (KT922233.1), one to C. felis (KM977642.1) and nine were similar for C. andersoni reference MF350628. C. andersoni was found in animals aged 26 months, an age group which is different from those described by several authors. The presence of C. parvum indicates that the calves in the studied region should be considered a potential source for zoonotic transmission. For the first time to our knowledge, C. felis was identified in cattle in America.(AU)

O estudo foi realizado num total de 25 propriedades localizadas nos assentamentos São José I e Salvador, situados nos municípios de Brejo Alegre e Birigui, no estado de São Paulo. Um registro de variáveis foi elaborado, incluindo dados como sexo, raça e idade dos animais. Foram colhidas 231 amostras de fezes de bovinos de um a seis meses de idade, sendo 128 fêmeas e 103 machos, 131 mestiços e 100 da raça Holandesa. Entre os 231 bovinos examinados, 17 (7,36%) foram positivos para Cryptosporidium spp. tanto pela coloração negativa de verde malaquita como pela nested-PCR. Das 17 amostras positivas, 14 apresentaram amplificação pela eletroforese em gel de agarose suficiente para fazer o sequenciamento de DNA. Essas sequências foram detectadas similaridade genética entre 99% e 100% com as seguintes espécies. Uma sequência foi semelhante com C. parvum (referência: AB513880.1), uma com C. bovis (MF074602.1), duas com C. ryanae (KT922233.1), uma com C. felis (KM977642.1) e nove foram semelhantes com C. andersoni (MF350628). O estudo caracteriza a presença do Cryptosporidium spp. em bovinos oriundos de propriedades produtoras de leite na região Noroeste do estado de São Paulo, sendo o C. andersoni a espécie mais prevalente nesses animais, principalmente em uma faixa etária diferente das descritas por diversos autores. A presença de C. parvum indica que os bezerros da região estudada devem ser considerados como uma fonte potencial de oocistos de espécies zoonóticas. Identificamos com ineditismo o C. felis em bovinos na América, o que corrobora outros estudos realizados na Polônia e Espanha e evidencia a presença de espécies de Cryptosporidium em fezes em hospedeiros não naturais.(AU)

First description of Giardia duodenalis in buffalo calves (Bubalus bubalis) in southwest region of São Paulo State, Brazil.

We performed molecular characterization of Giardia duodenalis in buffalo calves from the Southwest region of São Paulo State, Brazil. A total of 183 fecal samples of Murrah breed buffaloes up to six months of age were collected. We examined these samples by the polymerase chain reaction (PCR) targeting the small-subunit ribosomal RNA gene and positive samples were characterized using additional PCR assays targeting a portion of the beta-giardin, the glutamate dehydrogenase and the triose-phosphate isomerase genes. Based on the SSU rRNA nPCR, the presence of G. duodenalis was confirmed in 12 (6.56%) of fecal samples, of these, five, four and three samples were positive for the tpi, bg and gdh genes, respectively. Assemblage identification by sequencing was successful in 6 of 12 samples and sequence analysis showed 100% genetic similarity with G. duodenalis assemblage E. This observation represents the first detection of G. duodenalis assemblage E in buffaloes calves in Brazil.

Prevalence of Ehrlichia canis (Rickettsiales: Ehrlichieae) DNA in Tissues From Rhipicephalus sanguineus (Acari: Ixodidae) Ticks in Areas Endemic for Canine Monocytic Ehrlichiosis in Brazil.

Canine monocytic ehrlichiosis (CME) is a disease caused by the obligate intracellular bacterium Ehrlichia canis. Tropical lineages of Rhipicephalus sanguineus ticks play an essential role in the transmission of this pathogen. The aim of the present study was to evaluate the prevalence of E. canis DNA in tissue from R. sanguineus ticks in areas endemic for CME in Brazil and quantify levels of E. canis DNA in dissected tissues from these samples. A total of 720 ticks were collected from 72 dogs (36 dogs from the city Araçatuba in São Paulo state and 36 from Campo Grande in the state of Mato Grosso do Sul). Ticks were dissected to collect the guts, ovaries and salivary gland. A quantitative polymerase chain reaction (qPCR) targeting the disulphide bond formation (dsb) protein gene was performed to quantify the level of E. canis infection. The E. canis dsb-qPCR assay was positive for 31.9, 10, and 15.2% of the gut, ovary, and salivary glands, respectively. The average gut, ovary, and salivary gland bacterial load estimated by qPCR was 1.21 × 103, 2.60 × 103, and 4.92 × 103 gene copies/µl, respectively. This is the first report of E. canis DNA in ovaries of R. sanguineus ticks parasitizing dogs in these CME-endemic areas. These observations raise the possibility of E. canis trans-ovarial transmission.

Molecular characterization of Cryptosporidium in calves from rural settlements in the Northwest region of the state of São Paulo, Brazil / Caracterização molecular de Cryptosporidium em bezerros de assentamentos rurais da região Noroeste do estado de São Paulo, Brasil

The study was conducted on 25 properties of the settlements São José I and Salvador, located in the municipalities of Brejo Alegre and Birigui, in the State of São Paulo, Brazil. A record of variables was elaborated and included data such as gender, breed and age of the animals. A total of 231 stool samples were collected from bovines aged one to six months, 128 being females and 103 males, 131 crossbred and 100 Holstein. Among the 231 samples, 17 (7.36%) were positive for Cryptosporidium spp. both by malachite green negative staining and by nested-PCR. Of the 17 positive samples, 14 were sequenced in agarose gel. These sequences were detected between 99% and 100% of genetic similarity for the following species. One sequence was similar to C. parvum (AB513880.1), one to C. bovis (MF074602.1), two to C. ryanae (KT922233.1), one to C. felis (KM977642.1) and nine were similar for C. andersoni reference MF350628. C. andersoni was found in animals aged 26 months, an age group which is different from those described by several authors. The presence of C. parvum indicates that the calves in the studied region should be considered a potential source for zoonotic transmission. For the first time to our knowledge, C. felis was identified in cattle in America.

O estudo foi realizado num total de 25 propriedades localizadas nos assentamentos São José I e Salvador, situados nos municípios de Brejo Alegre e Birigui, no estado de São Paulo. Um registro de variáveis foi elaborado, incluindo dados como sexo, raça e idade dos animais. Foram colhidas 231 amostras de fezes de bovinos de um a seis meses de idade, sendo 128 fêmeas e 103 machos, 131 mestiços e 100 da raça Holandesa. Entre os 231 bovinos examinados, 17 (7,36%) foram positivos para Cryptosporidium spp. tanto pela coloração negativa de verde malaquita como pela nested-PCR. Das 17 amostras positivas, 14 apresentaram amplificação pela eletroforese em gel de agarose suficiente para fazer o sequenciamento de DNA. Essas sequências foram detectadas similaridade genética entre 99% e 100% com as seguintes espécies. Uma sequência foi semelhante com C. parvum (referência: AB513880.1), uma com C. bovis (MF074602.1), duas com C. ryanae (KT922233.1), uma com C. felis (KM977642.1) e nove foram semelhantes com C. andersoni (MF350628). O estudo caracteriza a presença do Cryptosporidium spp. em bovinos oriundos de propriedades produtoras de leite na região Noroeste do estado de São Paulo, sendo o C. andersoni a espécie mais prevalente nesses animais, principalmente em uma faixa etária diferente das descritas por diversos autores. A presença de C. parvum indica que os bezerros da região estudada devem ser considerados como uma fonte potencial de oocistos de espécies zoonóticas. Identificamos com ineditismo o C. felis em bovinos na América, o que corrobora outros estudos realizados na Polônia e Espanha e evidencia a presença de espécies de Cryptosporidium em fezes em hospedeiros não naturais.

First description of Cryptosporidium hominis GP60 genotype IkA20G1 and Cryptosporidium parvum GP60 genotypes IIaA18G3R1 and IIaA15G2R1 in foals in Brazil.

The present study focuses on Cryptosporidium infections of foals in Brazil. A total of 92 animals of different breeds from 11 farms in the vicinity of Araçatuba in the state of São Paulo, were examined. According to PCR targeting the 18S rRNA gene, Cryptosporidium sp. DNA was detected in 21.7% (20/92) of foals. Good quality 18S rRNA, actin, HSP70 and gp60 genes nPCR amplicons were obtained from five fecal samples. PCR amplification and sequencing of a fragment of the GP60 sporozoite surface glycoprotein gene revealed C. parvum genotypes IIaA18G3R1, IIaA15G2R1. Interestingly, we also detected in two foals a GP60 genotype related to the human parasite C. hominis.

Cryptosporidium baileyi in wild captive psittacines in Brazil.

Cryptosporidiosis in birds manifests as an acute or chronic disease of the respiratory or digestive tracts. The objective of our study was to perform the molecular characterization of Cryptosporidium spp. in wild psittacines kept in captivity at the Araçatuba Municipal Zoo, São Paulo, Brazil. A total of 47 fecal samples were collected from Amazona aestiva, Psittacara leucophthalma, and Ara ararauna. All samples were collected at the time the birds defecated. DNA extraction was performed using the ZR Fecal DNA MiniPrep™ kit (Zymo Research). Screening for Cryptosporidium spp. was accomplished using nested PCR targeting the 18S RNA gene and sequencing of amplified fragments. Positivity for Cryptosporidium spp. (10.64%; 5/47) was found in A. ararauna (4) and P. leucophthalma (1) samples. The amplified fragments were sequenced and showed 100% genetic similarity with Cryptosporidium baileyi.

Validation of a new technique to detect Cryptosporidium spp. oocysts in bovine feces.

Due to its important zoonotic potential, cryptosporidiosis arouses strong interest in the scientific community, because, it was initially considered a rare and opportunistic disease. The parasitological diagnosis of the causative agent of this disease, the protozoan Cryptosporidium spp., requires the use of specific techniques of concentration and permanent staining, which are laborious and costly, and are difficult to use in routine laboratory tests. In view of the above, we conducted the feasibility, development, evaluation and intralaboratory validation of a new parasitological technique for analysis in optical microscopy of Cryptosporidium spp. oocysts, called TF-Test Coccidia, using fecal samples from calves from the city of Araçatuba, São Paulo. To confirm the aforementioned parasite and prove the diagnostic efficiency of the new technique, we used two established methodologies in the scientific literature: parasite concentration by centrifugal sedimentation and negative staining with malachite green (CSN-Malachite) and Nested-PCR. We observed good effectiveness of the TF-Test Coccidia technique, being statistically equivalent to CSN-Malachite. Thus, we verified the effectiveness of the TF-Test Coccidia parasitological technique for the detection of Cryptosporidium spp. oocysts and observed good concentration and morphology of the parasite, with a low amount of debris in the fecal smear.

Identification of Leishmania spp. promastigotes in the intestines, ovaries, and salivary glands of Rhipicephalus sanguineus actively infesting dogs.

Sand flies are recognized as the major vector of canine visceral leishmaniasis. However, in some areas of Brazil where sand flies do not occur, this disease is found in humans and dogs. There has been speculation that ticks might play a role in transmission of canine visceral leishmaniasis and the DNA of Leishmania spp. has been reported in whole ticks. We investigated the presence of Leishmania spp. promastigotes in the intestines, ovaries, and salivary glands of Rhipicephalus sanguineus ticks collected from tick-infested dogs in two cities of Brazil. We used 66 dogs that tested positive and 33 that tested negative for Leishmania spp. according to direct cytological examination assays. Ten ticks were collected from each dog and dissected to collect the intestines, ovaries, and salivary glands for immunohistochemistry (IHC) and diagnostic real-time polymerase chain reaction (RT-PCR). IHC results showed Leishmania spp. in 98, 14, and 8 % of the intestines, ovaries, and salivary glands, respectively. Real-time PCR showed that 89, 41, and 33 % of the tick intestine, ovary, and salivary glands, respectively, were positive for Leishmania spp. The verification of promastigotes of Leishmania spp. by two independent techniques in ticks collected from these urban region dogs showed that there is need for clarification of the role of ticks in the transmission of canine visceral leishmaniasis in Brazil.

Avaliação do grau de conhecimento sobre leishmaniose e toxoplasmose em moradores do município de Araçatuba, SP / Evaluation of the degree of knowledge on toxoplasmosis and leishmaniasis in residents in the Araçatuba city, SP / Evaluación del grado de conocimiento de los ciudadanos de Araçatuba acerca de leishmaniosis y toxoplasmosis

Considerando a importância zoonótica das infecções por Leishmania spp. e Toxoplasma gondii na região de Araçatuba, São Paulo, o presente trabalho determinou o grau de conhecimento de moradores araçatubenses sobre estas duas enfermidades. Questionários a respeito destas doenças foram aplicados a 123 entrevistados. Em relação ao grau de escolaridade, todas os entrevistados eram alfabetizados, sendo que 69,9% (86/123) não cursaram ensino superior e 30,8% (37/123) completaram um curso de graduação. Destes, 91,9% (34/37) sabiam o significado do termo zoonose, havendo diferença significativa em relação aos que não eram formados. Esta palavra era desconhecida por 57% (29/123) do total de entrevistados. A maioria dos não graduados, 59,3% (51/86) não sabia o que é toxoplasmose e entre os graduados, 35,1% (13/37) desconheciam o assunto, havendo diferença significativa entre os grupos. Quanto a prevenção da infecção por Leishmania, uma maior proporção de moradores preconizaram a limpeza ambiental seguida da coleira repelente e do uso de citronela. Em relação á toxoplasmose, 54,5% desconheciam as formas de transmissão desta enfermidade e entre os que possuíam grau superior completo, 13 ignoravam qualquer meio de transmissão. Em se tratando de prevenção desta doença, 55,3% (68/123) não souberam informar quaisquer conduta profilática. No grupo de maior instrução, 14 não sabiam como se prevenir contra a toxoplasmose. Os resultados encontrados no presente estudo, comprovam que a maioria dos entrevistados não tem consciência sobre a forma de transmissão dessas doenças, principalmente em relação à toxoplasmose.

Considering the importance of zoonotic infections by Leishmania spp. and Toxoplasma gondii in Araçatuba region, São Paulo, this study determined the degree of knowledge of residents of Araçatuba about these two diseases. Questionnaires about these diseases were applied to 123 people. Regarding schooling, all the respondents were literate, and 69.9% (86/123) did not attend higher education and 30.8% (37/123) completed an undergraduate degree. Of these, 91.9% (34/37) knew the meaning of the term zoonosis, with significant difference compared to those who were not trained. This word was unknown by 57% (29/123) of total respondents. Most non-graduates, 59.3% (51/86) did not know what is toxoplasmosis and among graduates, 35.1% (13/37) ignored the subject. There were significant difference between these groups. Regarding the prevention of Leishmania infection, a greater proportion of the residents advocated environmental cleanup, the collar repellent and use of citronella. In relation to toxoplasmosis, 54.5% did not know the ways of transmission of this disease and among those with graduate degree, 13 ignoring any transmission medium. When it comes to prevention of this disease, 55.3% (68/123) did not know any prophylactic. In the group of higher education, 14 did not know how to prevent toxoplasmosis. The results of this study show that the majority of respondents are not aware about the mode of transmission of these diseases, especially in relation to toxoplasmosis.

Considerando la importancia de las infecciones zoonóticas con Leishmania spp. y Toxoplasma gondii en Araçatuba región, São Paulo, este estudio se determinó el grado de conocimiento de araçatubenses residentes acerca de estas dos enfermedades. Cuestionarios sobre estas enfermedades se aplicaron a 123 personas. En cuanto a la escolaridad, todos los entrevistados eran alfabetizados. El 69,9% (86/123) no asistieron a la educación superior y el 30,8% (37/123) completó una licenciatura. De éstos, el 91,9% (34/37) conocía el significado del término zoonosis, hay diferencia significativa en comparación con aquellos que no fueron capacitados. Esta palabra era desconocida por 57% (29/123) de todos los encuestados. Mayoría de los no graduados, el 59,3% (51/86) no sabía lo que es y toxoplasmosis. Entre los graduados, el 35,1% (13/37) ignoran el tema, hay diferencias significativas entre los grupos. En cuanto a la prevención de la infección por Leishmania, una mayor proporción de los residentes preconizadas limpieza del medio ambiente luego el collar y el repelente de uso de citronela. En relación a la toxoplasmosis, el 54,5% no conocía las formas de transmisión de esta enfermedad y en aquellos con título de posgrado, 13 haciendo caso omiso de cualquier medio de transmisión. En lo que respecta a la prevención de esta enfermedad, el 55,3% (68/123) no sabía nada sobre la profilaxia. En el grupo de educación superior, 14 no saben cómo prevenir la toxoplasmosis. Los resultados de este estudio muestran que la mayoría de los participantes no son conscientes de la modalidad de la transmisión de estas enfermedades, especialmente en relación a la toxoplasmosis.