Hybrid integrated optical chaos circuits with optoelectronic feedback.

A chip-scale chaotic laser system with optoelectronic delayed feedback is proposed and analyzed by numerical simulation. This chip eliminates the need for bulky delay components such as long optical fibers, free propagation and external cavities, relying solely on internal devices and waveguides to achieve feedback delay. This approach simplifies integration, maintaining a compact chip size.

Increasing proportions of relapsing parasite species among imported malaria in China's Guangxi Province from Western and Central Africa.

Background: Travel-related malaria in non-endemic areas returning from endemic areas presents important challenges to diagnosis and treatment. Imported malaria to newly malaria-free countries poses further threats of malaria re-introduction and potential resurgence. For those traveling to places with high Plasmodium falciparum prevalence, prophylaxis against this parasite is recommended, whereas causal prophylaxis against relapsing malaria is often overlooked.

[Preliminary Analysis of the Genetic Loci of SAG1 and SAG3, the Surface Antigens of Toxoplasma gondii, in HIV-positive People in Dali of Yunnan Province].

Objective: To identify the genotypes of Toxoplasma gondii that infects HIV-positive people in Dali of Yunnan Province through analyzing the genetic loci of the surface antigens SAG1 and SAG3.

Methods: A total of 291 blood samples from HIV-positive cases were collected from the HIV/AIDS Prevention and Control Institution in Yunnan. Nested PCR was used to amplify SAGI and SAG3 genes in the blood samples.

[Analysis of sites of Toxoplasma gondii SAG2 gene in blood of HIV-positive people in Lincang City, Yunnan Province].

Objective: To preliminarily understand the genotype characteristics of Toxoplasma gondii in blood of HIV-positive persons in Lincang City, Yunnan Province.

Method: Two segments of SAG2 gene of T. gondii from blood samples of HIV-positive persons in Lincang City were extracted and amplified by using the nested PCR method and the genotype was identified and compared with the standard strain (Type I) of Toxoplasma gondii.

[Study and application of surface antigen in tachyzoites of Toxoplasma gondii].

Toxoplasma gondii is an intracellular protozoan parasite that infects all warm-blooded animals. The surface antigens of T. gondii with the potential for application as antigens of diagnosis and vaccines have been studied extensively in recent years, especially for P43, P35, P30, P23 and P22.

[Comparation of Toxoplasma gondii separated from HIV-positive people and RH strain GRA6 gene].

Objective: To comparatively analyze Toxoplasma gondii separated from HIV-positive people and RH strain GRA6 gene.

Methods: By using the nested PCR, the amplification of Dali HIV-positive blood samples and RH strains of Toxoplasma GRA6 genome was performed. The GRA6 gene amplification positive product was selected and the electrophoresis imaging was performed by being digested with the Mse I endonuclease, and the gene sequences were measured and analyzed.

[Genotypes of Toxoplasma gondii isolates from HIV positive patients in Yunnan Province].

One hundred and fifty serum samples of HIV positive patients were collected in western Yunnan Province from September 2011 to December 2012. Toxoplasma gondii B1 gene was amplified by nested PCR. Genotyping of T.

[Advances in genetyping of Toxoplasma gondii].

Toxoplasma gondii is a nucleated cell obligate parasite, and can cause severe toxoplasmosis. The genetypes of Toxoplasma gondii isolates of different host infections have significant differences, and the pathogenicity and sensitivity to drugs of different genotypes of Toxoplasma gondii isolates are also significantly different. At present, the analysis of Toxoplasma gondii genotypes is performed by using PCR-RFLP, PCR of highly repetitive sequences, multiple PCR and nested PCR techniques, and the multiple loci of amplification are usually B1, SAG2, HSP70, GRA6 and other genetic markers.

[Serological investigation of Toxoplasma gondii infection in HIV positive cases in Dali and Dehong of Yunnan].

Serum samples were collected from HIV positive cases (927) and HIV, negative ones (80) from June 2010 to August 2011 in Dali and Dehong Prefectures of Yunnan. Serum anti-Toxoplasma gondii IgG was detected by ELISA. The overall anti-Toxoplasma gondii IgG positive rate among HIV positive cases and HIV negative ones was 35.

Percutaneous CT-guided radiofrequency ablation for unresectable hepatocellular carcinoma pulmonary metastases.

Purpose: This study aimed to evaluate the safety and efficacy of percutaneous CT-guided radiofrequency ablation (RFA) for unresectable hepatocellular carcinoma pulmonary metastases (HCCPM) and to identify the prognostic factors for survival.

Materials And Methods: We reviewed the medical records of 320 patients with HCCPM treated between January 2005 and January 2012. Among them, 29 patients with 68 lesions of unresectable HCCPM underwent 56 RFA sessions.

[PCR-derived technology in gene identification and typing of Toxoplasma gondii].

Different genotypes of Toxoplasma gondii show a great diversity in pathogenicity and drug sensitivity. Application of the PCR-derived technologies in gene identification and typing of T. gondii provides an important basis to clinical diagnosis and treatment.

[Molecular diagnosis of toxoplasmosis].

This paper reviews the domestic and foreign literatures regarding molecular diagnosis of toxoplasmosis. The nucleic acid molecule hybridization and Toxoplasma gondii gene sequences for polymerase chain reaction (PCR), common and conventional PCR, nested PCR, real-time quantitative PCR, immune PCR, in-situ PCR, loop-mediated isothermal amplification technology are introduced.

[IgG antibody level in saliva from rabbits infected with Trichinella spiralis].

Twenty-eight Japanese big ear rabbits were randomly divided into control group and experimental group. Twenty rabbits in experimental group were each infected with 3000 larvae of Trichinella spiralis. Serum and saliva samples were collected at pre-infection and every week after infection, and were examined for IgG antibody by indirect ELISA using T.