Nigeria is identified as curvularia pallescens and its pathogenicity to maize is demonstrated by inocula tion experiments. Cochliobolus lunatus is the most commonly reported species in clinical cases of reported. Curvularia is a species of mold that relate mostly to subtropical and tropical plant parasites however, three ubiquitous species have been recovered from human infections, principally from cases of mycotic keratitis. Evaluation of pathogenicity of bipolaris and curvularia. Reports of human disease caused by this organism are rare but include. Two specific forward clgd1clgd2 and one reverse primers clgd3 were designed. In vitro evaluation of fungicides and organics against curvularia lunata and curvularia pallescens causing leaf blight in gladiolus d. Find related pest control products, articles and questions on curvularia spp. Treatment with a combination of topical antibiotics polymyxin b, sulfatetrimetoprim, and 10% sulfacetamide sodium, 1% miconazole, autologous serum, and 5% hypertonic saline was instituted. The anamorph of this fungus is known as curvularia lunata, while cochliobolus lunatus denotes the teleomorph or sexual state. Curvularia lunata poses an inhalation and a deep skin dermal inoculation health risk to persons with week immune system. Aug 25, 2012 three genera, cochliobolus, bipolaris and curvularia form a complex that contains many plant pathogens, mostly on grasses poaceae with a worldwide distribution.
We report the genome sequences of a highly virulent c. Pawar department of plant pathology, college of agriculture, dr. Clinical importance of the genus curvularia 159 india, karnataka october 1985september 1988 67 2 2. Curvularia has a downy or suedelike texture and may be a medium shade of brown to dark brown or nearly black in color. The purified amplicons were read in both directions using original pcr.
Culture of the lesion found heavy growth of enterococcus faecalis and curvularia spp. Curvularia is a mold which is associated with allergy in the literature and frequently reported in mold spore counts. A phylogenetic analysis of the genera bipolaris and curvularia has resulted in a realignment of. General information about curvularia inaequalis curvin this website uses cookies our website uses cookies to ensure that we give you the best possible online experience. Exo and endoglucanase production by curvularia affinis. Nigeria is identified as curvularia pallescens and its pathogenicity to maize is demonstrated by inocula tion. The shape of the spores is what is so unique to curvularia, and in fact, is where we get the name. Evaluation of pathogenicity of bipolaris and curvularia spp. Pdf the fungal genus curvularia includes numerous plant. Individual leaves initially show yellow and green dapple patterns that extend downwards from the leaf tip. India among the various flowering plants that provides. The fungus is an excellent saprophyte, meaning it exists or persists in dead and dying tissue. Curvularia leaf spot disease of foliage andor roots greencast.
Identification of curvularia lunata by polymerase chain. A phylogenetic and taxonomic reevaluation of the bipolaris. Curvularia leaf spot disease of foliage andor roots. Natural habitats plant saprobe and pathogen to cereal plants soil suitable substrates in the indoor environment paper wood products water activity unknown mode of dissemination wind. Curvularia can be easily distinguished from bipolaris and drechslera spp. Stereoscopic images of various bermudagrass leaf symptomatology. Curvulariafavorable response to oral itraconazole therapy.
Curvularia lunata is a widespread contaminant of seed crops. Cytological analysis and nuclear condition, observed through the hclgiemsa technique, showed vegetative and reproductive structures hypha and conidia formed by. Most kinds of mold grow and spread quickly, but according to the university of adelaide website, this particular strain of. Novel curvularia species from clinical specimens ncbi. Cryptic species of curvularia in the culture collection of.
Dematiaceous hyphomycete producing sympodial, pale brown, cylindrical or slightly curved phragmoconidia, with one of the cent. Cytological analysis and nuclear condition, observed through the hclgiemsa technique, showed vegetative and reproductive structures hypha and conidia formed by uni. Morphological and molecular characterization of curvularia. I here present two cases, a healthy man with locally invasive, mulicentric paranasal fungal sinusitis, and a case of progressive verrucal. Learn how to control curvularia spp with these easy to use products. Genome sequence and virulence variationrelated transcriptome. A leaf spot symptom of rice is one of the common symptoms found in the rice field and caused reduction of rice yield. Allergic bronchopulmonary disease caused by curvularia has been reported 2. Phylogenetic analysis showed that the 52 isolates clustered. In many countries, agricultural residues are generated in large quantities, and most of these are underutilized and considered waste, especially in developing countries. Aug 09, 20 curvularia is a hyphomycete found in plants and soil of tropical and temperate countries. The teleomorphic state of the type species curvularia lunata is cochliobolus lunatus fam.
Most commonly found on low cut turf grasses like golf and bowling greens. There is no clear morphological boundary between the asexual genera bipolaris and curvularia. Find, read and cite all the research you need on researchgate. Rinaldi mg, phillips p, schwartz jg, winn re, holt gr, shagets fw, elrod j, nishioka g, aufdemorte tb.
Curvularia definition of curvularia by medical dictionary. Curvularia lunata is an important maize foliar fungal pathogen that distributes widely in maize growing area in china. However, applicability of this region to discern curvularia spp. Curvularia may be found in almost any grass debris, even if the turf is healthy. Curvularia is a saprobic dematiaceous mold that has been associated with a wide spectrum of human infection 1, 2.
To date, however, only five known reports of endophthalmitis caused by curvularia spp. Example of common leaf tip necrosis of cut leaves 24 to 48 h after inoculation with bipolaris spp. Curvularia pallescens boedijn hyphomycetes is redescribed with the aid of a scanning electron microscope, and the optimal cultural conditions for growing this fungus are discussed. We do not use these to store personal information about you. Continuing to use this website means you agree to our use of cookies. Fungal isolation was done from diseased rice leaves showing leaf spot symptoms collected throughout peninsular malaysia. In this study, curvularia affinis was isolated from the leaves of phaseolus vulgaris l. Curvularia leaf spot occurs in areas that experience prolonged leaf wetness for several consecutive days. In immunosuppressed patients, infections are often serious, and systemic dissemination is not uncommon.
Curvularia lunata wakker boed, the causative agent of curvularia leaf spot in maize, was determined according to conidiophore and conidium morphology in a previous study. Curvularia is a hyphomycete fungus which is a facultative pathogen of many plant species. Mabadeje school of biological sciences, university of lagos, nigeria with plate 18 the causal agent of a leaf spot of maize in s. Isolation and molecular identification of curvularia lunata. The ctnsensus of opinion seems to be that curvularia will invade turf that is already weakened and become a secondary pathogen. Three isolates of curvularia were obtained from diseased eucalyptus sp. Three genera, cochliobolus, bipolaris and curvularia form a complex that contains many plant pathogens, mostly on grasses poaceae with a worldwide distribution. Studies on the discoloration of rice kernels caused by fungi. I here present two cases, a healthy man with locally invasive, mulicentric paranasal fungal sinusitis, and a case of progressive verrucal distal onychomycosis that. Recent studies have shown that morphological identification does not correlate with molecular identification manamgoda et al.
The isolates were analyzed in terms of phylogenetic relationships, morphology, and pathogenicity. Pdf clinical importance of the genus curvularia researchgate. It is associated with open globe injuries and is a common cause of secondary fungal keratitis after diagnostic aspiration. They usually have a curved appearance, having broad points at either end. Wintergrass, kentucky bluegrass, bentgrass, fescue, couch. There is no clear morphological boundary between the asexual genera bipolaris and curvularia, and some species show.
Most curvularia are found in tropical regions, though a few are found in temperate zones. Soil compaction and excessive levels of nitrogen and thatch. Proceedings of the association for plant protection of hokuriku, no. Natural habitats plant saprobe and pathogen to cereal plants soil suitable substrates in the indoor environment paper wood products water activity unknown mode of dissemination wind allergenic potential type i asthma and hay fever a relatively common cause of. The disease transmission was evaluated from seed sowing, in which after 40 days typical symptoms of curvularia sp. These are curvularia lunata, curvularia pallescens and curvularia geniculata curvularia lunata. Evaluation of curvularia lunata as an biological control. In the current study, a sensitive polymerase chain reaction assay was developed for the detection of c. Effects of temperature on mycelial growth sporulation and spore germination of curvularia spp. Curvularia is a hyphomycete associated with over 60 host genera manamgoda et al. Curvularia diseases produce irregularly shaped patches of thinned turf, often coalescing to affect larger areas.
Hence, curvularia lunata can be considered as a probable agent for the biological control of alisma plantagoaquatica, echinochloa spp. Evaluation of curvularia lunata as an biological control agent in major weeds. Exo and endoglucanase production by curvularia affinis using. In vitro evaluation of fungicides and organics against. Cochliobolus lunatus is a fungal plant pathogen that can cause disease in humans and other animals.
Curvularia species are ubiquitous and occasionally lead to infections in humans. Comparative analysis of phylogenetic relationships. The taxonomy of this complex is confusing as frequent nomenclatural changes and refinements have occurred. The spores of curvularia occur individually, with three or more transverse divisions, or septa. Among eye infections, the involvement of curvularia spp.
We agree with the view of authors like alcorn 1983b, sivanesan. Curvulariafavorable response to oral itraconazole therapy in. Most kinds of mold grow and spread quickly, but according to the university of adelaide website, this particular strain of mold grows especially fast. Novel curvularia species from clinical specimens article pdf available in persoonia molecular phylogeny and evolution of fungi in press1 july 2014 with 3,408 reads how we measure reads. Genome sequencing of the pathogen will provide important information for globally understanding its virulence mechanism. Pdf novel curvularia species from clinical specimens.
A phylogenetic analysis of the genera bipolaris and curvularia has resulted. Curvularia inaequalis curvinoverview eppo global database. After 8 days of medical therapy, an improvement of clinical signs. Novel curvularia species from clinical specimens article pdf available in persoonia molecular phylogeny and evolution of fungi in press1 july 2014 with. The objectives are to isolate and characterize curvularia and related species from leaf spot of rice by using morphological and molecular characterization and to determine the phylogenetic relationship between the isolated fungi. Curvularia lunata is a saprobic dematiaceous mould that resides primarily in soil ellis, 1966. Individual leaves initially show yellow and green dappled patterns that extend downwards from the leaf tip. Curvularia is a hyphomycete found in plants and soil of tropical and temperate countries. Curvularia species are important phytopathogens reported worldwide. Isolation and molecular identification of curvularia.
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