| [ultrastructure of sarcocystis tenella. i. endozoïte (after negative staining]. | the employment of negative staining technics for the endozoites (cyst stages) of sarcocystis tenella allowed the elucidation of certain aspects of their fine structure. the conoid consists of similar to 20 oblique fibers and is surmounted by a ring with regular ornamentation. in the conoid's interior there are 2 excentric parallel microtubules which extend posteriorly for a considerable distance into the adjacent cytoplasm. the fibers of the conoid, intraconoid microtubules, appear to have the s ... | 1975 | 50442 |
| [ultrastructural localization of alkaline phosphatase and atp-ase in cyst stages of sarcocystis tenella (sporozoa, coccidia) parasitic in the esophagus of sheep (author's transl)]. | the activity of adenosine triphosphatase and alkaline phosphatase was investigated at the fine structural level in the cyst stages of sarcocystis tenella parasitic in the esophagus of sheep. alkaline phosphatase reaction was observed along the outer membrane of the parasite's pellicle. the enzymatic activity was much higher on the surface of metrocytes than that of zoites, which proved to be infectious. no reaction was noted in the interior of the parasites. however, a significant amount of alka ... | 1975 | 126600 |
| electron microscope studies of cyst stages of sarcocystis tenella: the origin of micronemes and rhoptries. | the origin and the development of the micronemes and rhoptries was investigated at the ultrastructural level in cyst stages of sarcocystis tenella. during endodyogeny the micronemes appear in small vesicles distributed at the periphery of two large granular vacuoles in each daughter cell. later, these vacuoles were divided into numerous vesicular spiral formation-centers, producing micronemes at the apical pole of young merozoites. rhoptries were observed to originate from desnifications with in ... | 1975 | 805505 |
| [life-cycle of sarcosporidia. vi. studies on the species differentiation in sarcocystis fusiformis and sarcocystis tenella]. | | 1975 | 808211 |
| [growth of sarcocystis tenella in cell culture]. | sarcocystis tenella endozoites obtained from sheep oesophagus cysts have been cultivated in embryonic sheep kidney cells. they quickly enter the cells, become shorter and wider ("stage 2"), then grow to an ovoid shape within 24 h ("stage 3"). | 1975 | 810256 |
| [the presence of lytic bacteria within cysts of sarcocystis tenella (sporozoa, protozoa) (author's transl)]. | in cysts of sarcocystis tenella parasitic in the oesophage of sheep, bacteria of the gram-negative type were found to lyse the limiting membranes of the banana-shaped parasites. in cysts of s. tenella the parasites are enclosed within chamber-like hollows of the ground substance. in old cysts, however, only the peripheral hollows are filled with parasites, whereas those of the midzonal region are empty. there is no explanation for this observation reported by several authors. in the present stud ... | 1975 | 811188 |
| [life cycle of sarcosporidia. vi. studies on species differentiation of sarcocystis fusiformis and sarcocystis tenella]. | | 1975 | 812478 |
| [serological studies on sarcocystis in man and rats (author's transl)]. | during a study of sarcosporidiosis in man, rats too were fed on meat infected with sarcocystis tenella and a. fusiformis. further investigations were made on the antigen relationship between sarcocystis and toxoplasma using 50 mice infected with toxoplasma. the results are as follows: 1. 18-39 days after eating raw minced meat (beef) containing sarcocystis fusiformis, 5 (=41,7%) out of 12 people excreted sporulated sporocysts of the species isospora hominis in the faeces. 2. excretion of sporocy ... | 1976 | 822622 |
| comparison of in vitro translation products of sarcocystis gigantea and sarcocystis tenella. | poly(a)+ rna was purified from cystozoites of sarcocystis gigantea and sarcocystis tenella and used to in vitro translate polypeptides in a wheat germ and a rabbit reticulocyte translation system. the in vitro translated polypeptides were compared by sodium dodecyl sulphate-polyacrylamide gel electrophoresis. the s. tenella mrna translated at least two polypeptides (mol. wt about 80,000 and 21,500) in both translation systems that were not translated by the s. gigantea mrna. to study co-translat ... | 1992 | 1587678 |
| prevalence of sarcocystis species in sheep and goats in northern nigeria. | tissue samples comprising the oesophagus and diaphragm were collected from 400 sheep and 400 goats slaughtered at the abattoirs in the study area. out of this number, 36 were positive for sarcocystis cysts (sarcocysts) in sheep and 56 in goats. the sarcocysts in sheep measured 35.7 to 500 microns lengthwise and the cyst-wall 2.4 microns. they were identified to be sarcocystis tenella. the cysts in goats measured 98 to 700 microns and the cyst-wall 2.7 microns. they were identified to be sarcocys ... | 1991 | 1775692 |
| separation of antigens from sarcocystis species using chromatofocusing. | crude antigen preparations from bradyzoites of sarcocystis species exhibit a high degree of cross-reactivity with antisera against heterologous sarcocystis species, preventing the development of a species-specific immunological test for sarcocystiosis. in this study, we fractionated bradyzoite-derived protein extracts from sarcocystis tenella, sarcocystis arieticanis, sarcocystis gigantea, and sarcocystis muris by chromatofocusing and obtained distinct protein elution profiles for each species. ... | 1991 | 1919920 |
| the in vitro excystation of sarcocystis gigantea sporocysts. | studies on the in vitro excystation of sarcocystis gigantea sporocysts revealed that pretreatment before exposure to trypsin and bile was an essential prerequisite. however, in contrast to sarcocystis tenella and sarcocystis capracanis, incubation in cysteine hydrochloride under co2 was largely unsuccessful for excysting sarcocystis gigantea: of the pretreatments tested, only exposure to sodium hypochlorite proved effective. excystation from sodium hypochlorite-pretreated s. gigantea sporocysts ... | 1990 | 2125159 |
| ultrastructure of sarcocystis tenella (sarcocystis ovicanis). | the ultrastructure of the parasitophorous cyst, the metrocytes and merozoites of sarcocystis tenella (s. ovicanis) was studied. the general ultrastructural features of the cyst wall and the cells of the protozoan, previously described by other authors, were confirmed. the vesicle-like invaginations of the unit membrane (primary wall) of the cyst are identical with the micropinocytic pits of other animal cells, and we believe that they contribute to the nutritional process of the cyst. the golgi ... | 1989 | 2510395 |
| sarcocystis tenella from the sheep in japan (protozoa, apicomplexa). | | 1989 | 2511371 |
| fatal perinatal sarcocystosis in a lamb. | a 3-wk-old lamb died because of neurological disease. the predominant microscopic lesions were in the brain and spinal cord and consisted of nonsuppurative encephalomyelitis with severe gliosis throughout the gray and white matter. immature and mature schizonts, 15.7 x 10.6 microns (8-30 x 6-18 microns), occurred in capillaries and were structurally similar to those of sarcocystis tenella. | 1989 | 2515265 |
| differentiation of sarcocystis species in european sheep by isoelectric focusing. | isoelectric focusing was carried out on total proteins derived from cystozoites of sarcocystis tenella, s. arieticanis and s. gigantea. the overall protein profile of each species was distinct and reproducible and enabled the unequivocal differentiation of the three sarcocystis species. in total, approximately 60 bands could be counted for s. tenella and s. arieticanis and approximately 45 bands for s. gigantea cystozoites in the ph range of 3-9. isoelectric points (pis) were determined for domi ... | 1989 | 2515534 |
| clinical, haematological and plasma biochemical changes in specified-pathogen-free (sporozoa) lambs experimentally infected with low numbers of sarcocystis tenella sporocysts. | two groups of lambs raised free of sporozoan infection were inoculated with sarcocystis tenella sporocysts and compared with controls. lambs from group 1 were inoculated with 5000 sporocysts and those in group 2 were given 20,000. transient increases in rectal temperatures occurred between 23 and 39 days post-inoculation (dpi), although the lambs appeared normal and retained their appetites. packed cell volumes (pcv) of lambs given 20,000 sporocysts decreased dramatically from 28 to 38 dpi after ... | 1987 | 2954299 |
| hosts of two canid genera, the red fox and the dog, as alternate vectors in the transmission of sarcocystis tenella from sheep. | microscopic sarcocysts recovered from naturally infected sheep were infective to both the domestic dog (canis familiaris) and the red fox (vulpes vulpes). the parasite was passaged through experimental specific-parasite-free (spf) sheep three times: infection was transmitted twice with sporocysts from foxes and subsequently with sporocysts from dogs. the sarcocysts from sheep muscle were infective to both dogs and foxes on each occasion. a cat was not infected. the prepatent period in individual ... | 1987 | 2964118 |
| antibody development and cellular immune responses in sheep immunized and challenged with sarcocystis tenella sporocysts. | four specific-pathogen-free (spf) sheep were experimentally infected with 10(3) or 10(4) sarcocystis tenella (syn. s. ovicanis) sporocysts and another two sheep served as uninfected controls. all sheep were challenged 49 days later by infection with 2.5 x 10(5) sporocysts and their humoral and cellular responses to infection and challenge were assessed weekly by enzyme immunoassays and lymphocyte transformation assays. the control sheep died from acute sarcocystosis 29-30 days after challenge, w ... | 1988 | 2967011 |
| in vitro cultivation of the vascular phase of sarcocystis capracanis and sarcocystis tenella. | sporozoites of sarcocystis capracanis and s. tenella (apicomplexa) penetrated all four cell types tested (bovine monocytes, bm; bovine pulmonary artery endothelial cells, cpa; madin-darby bovine kidney; and ovine monocytes). sporozoites of s. tenella developed to meronts in bm and cpa; those of s. capracanis developed to meronts in bm only. both species of sarcocystis developed to large first-generation meronts followed by small meronts. at 40 to 50 days after inoculation (dai) of sporozoites, c ... | 1986 | 3098969 |
| in vitro excystation of sarcocystis capracanis, sarcocystis cruzi and sarcocystis tenella (apicomplexa). | improved rates of in vitro excystation of sporozoites from sporocysts of sarcocystis capracanis, sarcocystis cruzi, and sarcocystis tenella were obtained by pretreating sporocysts with an aqueous sodium hypochlorite (naocl) solution followed by incubation in excysting fluid (ef). after pretreatment with naocl, sporocysts were washed 4 times in hanks' balanced salt solution and then incubated in various ef (ph 7.4) at 38.5 c in 5% co2-95% air. maximum rates of excystation (free sporozoites/(sporo ... | 1986 | 3102713 |
| lesions in sheep inoculated with sarcocystis tenella sporocysts from canine feces. | sarcocystosis was studied in 37 sheep after oral inoculation with 10(4)-5 x 10(7) sporocysts of sarcocystis tenella from canine feces. two sheep inoculated with 2.5 x 10(7) and 5 x 10(7) sporocysts became moribund 16 and 19 days post-inoculation (dpi), respectively, due to occlusion of arteries of gut and mesentery by first generation meronts. sheep inoculated with 10(7) sporocysts remained clinically normal until 21 dpi and those inoculated with 10(5)-10(6) became ill 24-28 dpi due to anemia co ... | 1988 | 3126599 |
| sarcocystis arieticanis and other sarcocystis species in sheep in the united states. | histological sections of tongues, esophagi, and diaphragms from 512 adult ewes from the northwest united states and texas were examined for sarcocystis spp. sarcocysts were found in sections of 82.1% of 504 tongues, 44.4% of 478 esophagi, and 51.7% of 89 diaphragms. sarcocystis tenella was the predominant species and was found in 430 (84.0%) sheep; s. arieticanis was found in 18 (3.5%) sheep. the mean number of s. tenella sarcocysts in tissue sections was approximately 10 times higher than that ... | 1988 | 3142990 |
| [nonspecific precipitation reaction with an antigen of sarcocystis tenella]. | | 1973 | 4199547 |
| the transmission of sarcocystis tenella in sheep. | | 1973 | 4200670 |
| [developmental cycle of sarcocystis tenella]. | | 1973 | 4205684 |
| [fine structure of cyst and cyst wall of sarcocystis tenella, besnoitia jellisoni, frenkelia sp. and toxoplasma gondii]. | | 1974 | 4209540 |
| [transmission of sarcocystis tenella, in the cat, from intramuscular parasitic cystic forms in sheep: oocysts and sporocysts in photon and electron microscopy]. | | 1974 | 4210672 |
| [light and electron microscope studies on stages of sarcocystis tenella in the intestine of cats. i. the oocysts and sporocysts (author's transl)]. | | 1974 | 4211489 |
| [pathogenicity for lambs, of sarcocystis tenella sporocysts isolated from canine feces. short communication]. | | 1974 | 4212735 |
| is sarcocystis tenella two species. | | 1974 | 4218482 |
| [ultrastructure of: sarcocystis tenella cyst architecture and aspect of endozoites in scanning electron microscopy]. | | 1974 | 4218509 |
| [preparation from a cyst extract from sarcocystis tenella (rail.), of a protein fraction toxic to rabbits]. | | 1968 | 4236229 |
| [the fine structure of the cyst stages of sarcocystis tenella (authors transl)]. | | 1973 | 4355121 |
| the use of sarcocystis tenella "spores" in a new agglutination test for sarcosporidiosis. | | 1966 | 4959312 |
| the asexual pre-cyst development of sarcocystis tenella in experimentally infected specific pathogen-free lambs. | | 1984 | 6236156 |
| experimental infections of sarcocystis cruzi, sarcocystis tenella, sarcocystis capracanis and toxoplasma gondii in red foxes (vulpes vulpes). | four littermate 6-wk-old red foxes (nos. 1-4) were fed toxoplasma gondii, sarcocystis cruzi, s. tenella and s. capracanis. one littermate fox (no. 5) served as the control. two foxes (nos. 1, 2) were fed tissue cysts of t. gondii and two foxes (nos. 3, 4) were fed oocysts of t. gondii. twenty-one to 42 days later, the same five foxes were used to test the infectivity of meat of goat, sheep, and ox experimentally inoculated with sarcocystis. fox 2 was fed goat meat and shed s. capracanis-like spo ... | 1983 | 6417347 |
| cysts of sarcocystis tenella in north ronaldsay sheep. | | 1983 | 6419441 |
| the effect of sarcocystis tenella on wool growth in sheep. | a dose of 1 x 10(4) sarcocystis tenella sporocysts produced significant depression of wool growth in lambs dosed at 1 month of age. no significant effect on wool growth was produced when lambs were dosed at 5 months of age. | 1984 | 6437051 |
| characteristic proteins of micronemes and dense granules from sarcocystis tenella zoites (protozoa, coccidia). | a subcellular fractionation procedure has been developed, which allowed the recovery of purified fractions of micronemes, dense granules and pellicles from sarcocystis tenella zoites. as expected, sodium dodecyl sulphate polyacrylamide gels electrophoresis of the pellicles showed a fairly heterogenous protein content. in contrast, only one major omponent (42 000) daltons) was found in the dense granules, whereas two major bands (20 000 and 22 000 daltons) were observed for the micromemes. these ... | 1980 | 6777697 |
| an ultrastructural study of first- and second-generation merogony in the coccidian sarcocystis tenella. | sporocysts of the coccidian sarcocystis tennella were originally isolated in the feces of a coyote. sporocysts used for inoculation of lambs were obtained from experimentally infected dogs. at 14, 16, and 19 days postinoculation (dpi) of lambs with the sporocysts, various developmental stages of first-generation meronts were found within cells located between the endothelium and internal elastic membrane of mesenteric arteries. at 19, 21, and 25 dpi, second-generation merogony occurred in cells ... | 1981 | 6798206 |
| sarcocystis tenella: a lectin in muscle cysts. | | 1982 | 6814087 |
| life cycle of sarcocystis tenella in sheep and dog. | for sarcocystis tenella, the second microscopic sarcocyst in sheep, the dog was shown to act as final host shedding sporocysts measuring 13.75-15.8 (14.8 +/- 0.8) x 9.7-10.8 (10.1 +/- 0.4) micron after a prepatent period of 8-13 days. the clinical signs and the course of experimental infections in sheep were most similar to s. ovicanis. after high doses of sporocysts sheep had temperatures up to 42 degrees c, anaemia, and paresis; they finally died from haemorrhagic diathesis. the development of ... | 1982 | 6815916 |
| phylogenetic relationships between toxoplasma and sarcocystis deduced from a comparison of 18s rdna sequences. | the current taxonomy of parasites in the genus sarcocystis is largely based on morphological characteristics as well as on host specificity and life-cycle structure. recently, phylogenetic analyses of partial ribosomal rna (rrna) sequences provided support for paraphyly of sarcocystis. we have tested the validity of this hypothesis by sequencing the complete 18s rrna genes of sarcocystis arieticanis, sarcocystis gigantea and sarcocystis tenella and comparing them with gene sequences derived from ... | 1995 | 7596636 |
| species-specific identification of sarcocystis and toxoplasma by pcr amplification of small subunit ribosomal rna gene fragments. | the small subunit (ssu) ribosomal rna (rrna) genes of four cyst-forming coccidia (sarcocystis tenella, sarcocystis arieticanis, sarcocystis gigantea, toxoplasma gondii) infecting sheep were analysed for unique target sequences which could be used as priming sites for species-specific polymerase chain reactions (pcr). a total of 11 putatively species-specific oligonucleotides were tested in combination with universal oligonucleotides designed for conserved regions of the ssu rrna genes of eukaryo ... | 1994 | 7951394 |
| evaluation of a serological test system for the diagnosis of sarcocystis cruzi infection in cattle using s. cruzi merozoite antigen. | fifty serum samples were examined by enzyme-linked immunosorbent assay (elisa) for antibodies directed against crude antigens isolated from cystozoites and merozoites of sarcocystis cruzi and sarcocystis tenella/sarcocystis arieticanis and merozoites of toxoplasma gondii. of these 50 samples, 25 were from cattle originating from an area where the prevalence of s. cruzi was found to be very low (9%) and in which no cystozoites were detected, and 25 were from cattle which were found by a digestion ... | 1994 | 8171820 |
| cyst wall ultrastructure of two sarcocystis spp. from european mouflon (ovis ammon musimon) in germany compared with domestic sheep. | muscle samples from six wild and two captive european mouflons (ovis ammon musimon) in germany as well as one domestic sheep from a german zoo were infected with sarcocysts (sarcocystis: sarcocystidae, apicomplexa). sarcocystis tenella and s. arieticanis were identified by light and electron microscopy. both species are determined for the first time from wild sheep, and this is the first description of s. arieticanis from wild sheep. | 1995 | 8592390 |
| a rapd-pcr derived marker can differentiate between pathogenic and non-pathogenic sarcocystis species of sheep. | random amplified polymorphic dna (rapd)-pcr was used to differentiate among four cyst-forming coccidia of sheep, sarcocystis tenella, sarcocystis gigantea, sarcocystis arieticanis, and toxoplasma gondii. genomic dna of the four parasite species was amplified using rapd-pcr and the dna fragments were separated on agarose gels. a rapd-pcr band derived from s. tenella was isolated from the gel and subcloned into puc18. the insert was sequenced and found to be 1278 nucleotides long. this sequence ap ... | 1996 | 8799369 |
| production of a recombinant fusion protein of sarcocystis tenella and evaluation of its diagnostic potential in an elisa. | we have isolated a cdna clone encoding an antigenic polypeptide of sarcocystis tenella by screening a cystozoite-derived cdna library in lambda gt11 with antibodies from sheep infected experimentally with s. tenella. this clone, termed stc29, was subcloned and expressed in the vector pgex-3x as a soluble fusion protein with glutathione s-transferase having an apparent molecular mass of 46 kda. antibody raised against the recombinant fusion protein recognized a native polypeptide of 25 kda in cys ... | 1996 | 8983145 |
| development of a polymerase chain reaction assay for the diagnosis of neosporosis using the neospora caninum 14-3-3 gene. | neospora caninum is a recently described apicomplexan parasite which causes neuromuscular disease in dogs, and abortion and neonatal morbidity in cattle, sheep and horses. morphological similarities and serological cross-reactivity between n. caninum and the closely related parasite toxoplasma gondii, have resulted in the frequent misdiagnosis of neosporosis as toxoplasmosis. this report describes the isolation and characterization of an n. caninum cdna clone encoding a 14-3-3 protein homologue. ... | 1996 | 8992315 |
| identification of synapomorphic characters in the genus sarcocystis based on 18s rdna sequence comparison. | in order to further investigate synapomorphic characters in the genus sarcocystis, the small subunit ribosomal rna gene sequences of sarcocystis capracanis and sarcocystis moulei were determined and used to infer the phylogenetic position of these two organisms within the cyst-forming coccidia. phylogenies derived using distance, maximum parsimony and maximum likelihood methods demonstrated that s. capracanis groups with sarcocystis tenella and sarcocystis arieticanis as a clade that shares the ... | 1997 | 9304808 |
| development and validation of species-specific nested pcrs for diagnosis of acute sarcocystiosis in sheep. | sheep may be infected by four species of sarcocystis. two of these species, sarcocystis tenella and sarcocystis arieticanis, are pathogenic. they may cause abortion or acute disease during the early phase of infection, and chronic disease during the late phase of infection. thus far, diagnosis of sarcocystiosis in sheep has been limited, because traditional diagnostic tests based on the detection of sarcocystis-specific antibodies are only genus-specific and, thus, cannot differentiate between p ... | 1999 | 10576582 |
| comparison of immunological and molecular methods for the diagnosis of infections with pathogenic sarcocystis species in sheep. | sheep may be infected by four species of sarcocystis: sarcocystis tenella and sarcocystis arieticanis are pathogenic, sarcocystis gigantea and sarcocystis medusiformis are non-pathogenic. the two pathogenic species may cause abortion or acute disease during the early phase of infection and chronic disease during the late phase of infection. thus far, diagnosis of sarcocystiosis has been limited, because traditional diagnostic tests based on the detection of sarcocystis-specific antibodies are on ... | 1998 | 10622625 |
| clinical, pathological and epidemiological findings in three outbreaks of ovine protozoan myeloencephalitis. | ovine protozoan myeloencephalitis is a disease of sheep associated with the apicomplexan protozoan sarcocystis tenella. this paper describes the clinical, pathological and epidemiological findings in three affected flocks from a well-defined geographical area. clinical signs were restricted to sheep under one year old in their first winter and were first observed at least 42 days after they had been moved off the hill grazing areas to low ground pasture, or after they were given conserved forage ... | 2000 | 10661454 |
| a new dye test for toxoplasma and sarcocystis infections by use of sarcocystis tenella spores. | | 1954 | 13187565 |
| [comparative electronoptical examinations of toxoplasma gondii and sarcocystis tenella]. | | 1956 | 13353530 |
| [electron microscopic findings on the morphology of sarcosporidia (sarcocystis tenella railliet 1886)]. | | 1958 | 13616583 |
| [microscopic and serological studies on the incidence of sarcocystis tenella in sheep]. | | 1961 | 13735512 |
| [on the ultrastructure of the cystic envelope in sarcosporidia of sheep (sarcocystis tenella rail.)]. | | 1961 | 13910631 |
| [morphology of cysts of toxoplasma gondii and sarcocystis tenella]. | | 1955 | 14391500 |
| [the silver fibril structure of toxoplasma gondii and sarcocystis tenella]. | | 1959 | 14418728 |
| prevalence of dog-derived sarcocystis spp. in some new zealand lambs. | pepsin: hydrochloric acid digestion and histological examination of the myocardium of 51 hearts from five to nine month-old lambs from the southern half of the north island, showed that 47 (92%) were infected with microscopic sarcocysts that are presumed to be dog-derived. of 157 sarcocysts detected histologically, 32 corresponded morphologically with sarcocystis ovicanis and 120 with sarcocystis tenella (syn. s. arieticanis). the remainder could not be identified as to type. | 1987 | 16031410 |
| first identification of sarcocystis tenella (railliet, 1886) moulé, 1886 (protozoa: apicomplexa) by pcr in naturally infected sheep from brazil. | sarcocystis tenella is a dog-sheep protozoan parasite, causing a widespread enzootic muscle parasitosis and neurological disease mainly in lambs. this parasite is pathogenic to sheep and important to the economical production of sheep. the present study was initially aimed to determine toxoplasma gondii infection and the occurrence of co-infection with other apicomplexa parasites in 602 brazilian sheep. twenty of these sheep were positive with antibodies to t. gondii by mat and ifat-igg tests, p ... | 2009 | 19647370 |
| prevalence, morphology, and molecular characteristics of sarcocystis spp. in domestic goats (capra hircus) from kunming, china. | despite the importance of worldwide goat production, little is known about the prevalence of sarcocystis spp. in domestic goats (capra hircus) in china. the aims of the present study were to determine prevalence of sarcocystis spp. in domestic goats in kunming, china, as well as to identify parasite species based on morphological characteristics and dna sequence analysis. only microscopic sarcocysts of sarcocystis spp. were detected in 174 of 225 goats (77.3 %). by light and transmission electro ... | 2016 | 27289532 |
| sarcocystis spp. in sheep and goats: frequency of infection and species identification by morphological, ultrastructural, and molecular tests in bahia, brazil. | sarcocystis spp. are cyst-forming coccidia that infect numerous animals species, including several livestock species. despite the importance of sheep and goat production in brazil, little it is known about the sarcocystis species that infect small ruminants in the country and their potential impact on meat condemnation due to the presence of macroscopic cysts of the parasite. the aims of the present study were to determine the frequency of infection by sarcocystis spp. in goats and sheep intende ... | 2016 | 26786832 |
| molecular identification of macroscopic and microscopic cysts of sarcocystis in sheep in north khorasan province, iran. | sarcocystis is an obligatory intracellular protozoan parasite which can infect humans and animals. sheep are intermediate hosts of four sarcocystis species: sarcocystis tenella, sarcocystis gigantea, sarcocystis arieticanis, and sarcocystis medusiformis the purpose of this study was to perform a molecular identification of the macroscopic and microscopic cysts of sarcocystis in sheep. in this investigation, the macroscopic and microscopic cysts of sarcocystis were assessed in slaughtered sheep. ... | 2014 | 24551821 |
| theileria infection in domestic ruminants in northern ethiopia. | piroplasmosis caused by different tick-borne hemoprotozoan parasites of the genera theileria and babesia is among the most economically important infections of domestic ruminants in sub-saharan africa. a survey for piroplasm infection was conducted in three locations in northern ethiopia. of 525 domestic ruminants surveyed, 80% of the cattle, 94% of the sheep and 2% of the goats were positive for different theileria spp. based on pcr of blood followed by dna sequencing. sheep had a significantly ... | 2014 | 24360645 |
| phylogenetic relationships among sarcocystis species in cervids, cattle and sheep inferred from the mitochondrial cytochrome c oxidase subunit i gene. | coccidian parasites in the genus sarcocystis have a two-host life cycle, and have traditionally been identified on the basis of morphological features of the sarcocyst stage in their intermediate hosts. additional molecular species identification, delimitation and phylogeny of sarcocystis spp. have been based mainly on the nuclear ssrrna gene. this gene is well suited for discrimination between more distant species but less so for closely related species. the objective of this study was therefor ... | 2013 | 23542092 |
| first molecular characterization of sarcocystis tenella in tatra chamois (rupicapra rupicapra tatrica) in poland. | in this study, sarcocysts from three polish tatra chamois were isolated and identified using morphological and molecular methods for the first time. six cysts were found in the latissimus dorsi muscle and another two in the diaphragm. no sarcocysts were detected in the myocardium, tongue, and esophagus. the isolated cysts were long with rounded ends, 0.35-0.61 mm in length, and 0.02-0.06 mm in width. all the sarcocysts were identified as sarcocystis tenella on the basis of light microscopy and s ... | 2015 | 26202841 |
| sarcocystosis in a stillborn lamb. | confirmed congenital sarcocystosis has been reported extremely rarely in domestic ruminants. sarcocystosis was diagnosed in a stillborn lamb with microscopic lesions predominantly in the central nervous system and placenta. encephalitis was characterized by multiple foci of glial nodules some with central necrosis, perivascular cuffing and vascular occlusion, while placental lesions consisted of multifocal necroses, inflammation and mild calcification. immature and mature schizonts were found in ... | 2014 | 25220847 |
| respiratory disease due to acute sarcocystis tenella infection in sheep. | | 2012 | 22660856 |