Advertisement

Topics

Phylogenetic analysis of Pythium insidiosum Thai strains using cytochrome oxidase II (COX II) DNA coding sequences and internal transcribed spacer regions (ITS).

06:00 EDT 8th September 2010 | BioPortfolio

Summary of "Phylogenetic analysis of Pythium insidiosum Thai strains using cytochrome oxidase II (COX II) DNA coding sequences and internal transcribed spacer regions (ITS)."

To investigate the phylogenetic relationship among Pythium insidiosum isolates in Thailand, we investigated the genomic DNA of 31 P. insidiosum strains isolated from humans and environmental sources from Thailand, and two from North and Central America. We used PCR to amplify the partial COX II DNA coding sequences and the ITS regions of these isolates. The nucleotide sequences of both amplicons were analyzed by the Bioedit program. Phylogenetic analysis using genetic distance method with Neighbor Joining (NJ) approach was performed using the MEGA4 software. Additional sequences of three other Pythium species, Phytophthora sojae and Lagenidium giganteum were employed as outgroups. The sizes of the COX II amplicons varied from 558-564 bp, whereas the ITS products varied from approximately 871-898 bp. Corrected sequence divergences with Kimura 2-parameter model calculated for the COX II and the ITS DNA sequences ranged between 0.0000-0.0608 and 0.0000-0.2832, respectively. Phylogenetic analysis using both the COX II and the ITS DNA sequences showed similar trees, where we found three sister groups (A(TH), B(TH), and C(TH)) among P. insidiosum strains. All Thai isolates from clinical cases and environmental sources were placed in two separated sister groups (B(TH) and C(TH)), whereas the Americas isolates were grouped into A(TH.) Although the phylogenetic tree based on both regions showed similar distribution, the COX II phylogenetic tree showed higher resolution than the one using the ITS sequences. Our study indicates that COX II gene is the better of the two alternatives to study the phylogenetic relationships among P. insidiosum strains.

Affiliation

*Interdisciplinary Program, Medical Microbiology, Chulalongkorn University, Bangkok, Thailand.

Journal Details

This article was published in the following journal.

Name: Medical mycology : official publication of the International Society for Human and Animal Mycology
ISSN: 1460-2709
Pages:

Links

DeepDyve research library

PubMed Articles [17007 Associated PubMed Articles listed on BioPortfolio]

In Vitro Susceptibility of Pythium insidiosum to Melaleuca alternifolia, Mentha piperita and Origanum vulgare Essential Oils Combinations.

Pythium insidiosum is the etiologic agent of pythiosis, a severe and emerging disease that affects mammals. Failure of conventional antifungal therapies is partially justified by the absence of ergost...

In Vitro Activity of Melaleuca alternifolia (Tea Tree) in Its Free Oil and Nanoemulsion Formulations Against Pythium insidiosum.

Pythium insidiosum is an important aquatic oomycete which can cause pythiosis in both animals and humans. This microorganism shows low susceptibility to antifungal drugs available. This study analyzed...

Human Sentinel Surveillance of Influenza and Other Respiratory Viral Pathogens in Border Areas of Western Cambodia.

Little is known about circulation of influenza and other respiratory viruses in remote populations along the Thai-Cambodia border in western Cambodia. We screened 586 outpatients (median age 5, range ...

Isolation and phylogenetic analysis of caprine Orf virus in Malaysia.

Orf virus is a DNA virus that causes contiguous ecthyma in goat and sheep. Infection of animals with this virus cause high mortality in young animals resulting in huge economic losses. In this study, ...

Phylogenetic relationships of twenty Gymnothorax species based on cytochrome b sequence data.

To study the phylogenetic relationships of the genus Gymnothorax (moray eels) distributed in South China Sea, polymerase chain reactions were performed, and the amplification products were sequenced b...

Clinical Trials [1664 Associated Clinical Trials listed on BioPortfolio]

Epidermal Nerve Fiber Density, Fat and Mitochondrial Parameters in Thai HIV+ Patients on d4T and HIV- Patients

This study will provide the range of Epidermal Nerve Fiber Density (ENFD) typically seen in Thai individuals. ENFD values from Thai HIV-negative subjects without neuropathy will be used as...

Pharmacokinetic Study of 2 Doses of ATV/r OD + 2 NRTIs in Thai HIV-1 Infected Patients

Several studies from HIV-NAT have demonstrated high nevirapine, indinavir, saquinavir and lopinavir/r levels when compared to Caucasian patients. Until now, the pharmacokinetics of atazana...

Cross-Cultural of the Validity, Reliability and Interpretability of Thai-version of Urticaria Control Test

Chronic urticaria symptoms commonly fluctuate from day by day. Consequently the clinical presentation of a patient in each visit is not representative of the current disease status. Dermat...

Study of Genetic Polymorphisms in Thai HIV-1 Infected Patients on SQV/r

Study of genetic polymorphisms of CYP #A and MDR-1 genes in Thai HIV-1 infected patients on saquinavir/ritonavir.

Relationship of Staphylococcal Colonization to Infection

Inpatients will be prospectively have nares screened and MRSA strains collected. All clinical MRSA strains of patients will also be prospectively collected. A sensitive strain discriminati...

Medical and Biotech [MESH] Definitions

A granulomatous disease caused by the aquatic organism PYTHIUM insidiosum and occurring primarily in horses, cattle, dogs, cats, fishes, and rarely in humans. It is classified into three forms: ocular, cutaneous, and arterial.

A protein complex that includes CYTOCHROME B6 and CYTOCHROME F. It is found in the THYLAKOID MEMBRANE and plays an important role in process of PHOTOSYNTHESIS by transferring electrons from PLASTOQUINONE to PLASTOCYANIN or CYTOCHROME C6. The transfer of electrons is coupled to the transport of PROTONS across the membrane.

RESTRICTION FRAGMENT LENGTH POLYMORPHISM analysis of rRNA genes that is used for differentiating between species or strains.

A multisubunit enzyme complex that contains CYTOCHROME B GROUP; CYTOCHROME C1; and iron-sulfur centers. It catalyzes the oxidation of ubiquinol to UBIQUINONE, and transfers the electrons to CYTOCHROME C. In MITOCHONDRIA the redox reaction is coupled to the transport of PROTONS across the inner mitochondrial membrane.

A cytochrome form of lactate dehydrogenase found in the MITOCHONDRIA. It catalyzes the oxidation of L-lactate to PYRUVATE with transfer of electrons to CYTOCHROME C. The enzyme utilizes FMN and PROTOHEME IX as cofactors.

Quick Search
Advertisement
 


DeepDyve research library

Relevant Topics

Bioinformatics
Bioinformatics is the application of computer software and hardware to the management of biological data to create useful information. Computers are used to gather, store, analyze and integrate biological and genetic information which can then be applied...

DNA sequencing
DNA sequencing is the process of determining the precise order of nucleotides within a DNA molecule. During DNA sequencing, the bases of a small fragment of DNA are sequentially identified from signals emitted as each fragment is re-synthesized from a ...


Searches Linking to this Article