scholarly journals Determination the causative strain for hydatid cyst in Iraqi cattle by using ND1 gene

2017 ◽  
Vol 41 (1) ◽  
pp. 11-16
Author(s):  
Mohammed J. Muhaidi

     Hydatid Cysts were obtained from 15 cows from liver, lung, spleen, heart, and peritoneal cavity, between December 2014 and October 2015. Hydatid cysts (protoscoleces) were used for deoxyribonucleic acid extraction by using mechanical grinder. The purification of mtDNA was done by (promega kit, USA). The mitochondrial NADH dehydrogenase subunit 1 (ND1) genes was used as targets for polymerase chain reaction amplification, all hydatid cysts yielded amplification products. Polymerase chain reaction product for NADH1 800 basic pair. The polymerase chain reaction products were purified and partial sequences were generated. The sequences obtained were found to align with corresponding region for ND1 gene in the Gene Bank nucleotide database confirming to genotype of sheep strain (G1) in Iraq, Phylogenetic analysis of partial sequence data from ND1 genes for obtained Phylogenetic tree. G1 genotype was the most common taxon and the actual source of infection of Iraqi's cattle. All of 15 strains were G1 genotype (sheep strain) based on the partial sequences of NADH dehydrogenase 1 (ND1).

Micromachines ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 186 ◽  
Author(s):  
Xinchao Zhu ◽  
Jun Zhao ◽  
Anzhong Hu ◽  
Jingyu Pan ◽  
Guoqing Deng ◽  
...  

The outbreak of Zika virus (ZIKV) has posed a great challenge to public health in recent years. To address the urgent need of ZIKV RNA assays, we integrate the microfluidic chip embedded with chitosan-modified silicon dioxide capillaries, smartphone-based detection unit to be a C3-system for the rapid extraction and detection of ZIKV RNA. The C3-system is characterized by: (1) four chitosan-modified silicon dioxide capillaries integrated in the microfluidic chip for target ZIKV RNA enrichment and “in situ PCR” (polymerase chain reaction) amplification; (2) smartphone-based point of care (POC) device consisting of a pneumatic subsystem for controlling the nucleic acid extraction processes in the microfluidic chip, a heating subsystem for sample lysis and PCR amplification, and an optical subsystem for signal acquisition. The entire detection processes including sample lysis, ZIKV RNA enrichment, and reverse-transcription polymerase chain reaction (RT-PCR) is achieved in the microfluidic chip. Moreover, PCR buffers can be directly loaded into the chitosan-modified silicon dioxide capillaries for “in situ PCR”, in which the captured ZIKV RNA is directly used for downstream PCR without any loss. ZIKV RNA extracted by the C3-system can be successfully recovered at very low concentrations of 50 transducing units (TU)/mL from crude human saliva. This means that our method of detecting viremia in patients infected with ZIKV is reliable.


Genome ◽  
1991 ◽  
Vol 34 (6) ◽  
pp. 1028-1031 ◽  
Author(s):  
Alexander Kolchinsky ◽  
Maria Kolesnikova ◽  
Evgenii Ananiev

Nontranscribed spacers of plant genes coding for ribosomal 5S RNA were amplified using the polymerase chain reaction. Primers were synthesized that were complementary to 3′ (direct) and 5′ (reverse) ends of the coding region and that are universal for higher plants. The patterns of polymerase chain reaction products are species and, sometimes, variety specific. The use of this approach for identification of barley 5S genes in chromosome-addition lines of wheat is discussed. This principle can be applied for the "portraying" of other tandem repetitive genes containing divergent regions.Key words: polymerase chain reaction, 5S genes, plants, DNA polymorphism.


1995 ◽  
Vol 31 (5-6) ◽  
pp. 371-374 ◽  
Author(s):  
R. Gajardo ◽  
R. M. Pintó ◽  
A. Bosch

A reverse transcription polymerase chain reaction (RT-PCR) assay is described that has been developed for the detection and serotyping of group A rotavirus in stool specimens and concentrated and non-concentrated sewage specimens.


2000 ◽  
Vol 287 (2) ◽  
pp. 349-352 ◽  
Author(s):  
Vincent W.S. Liu ◽  
Phillip Nagley ◽  
Hextan Y.S. Ngan

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