This study examined the sex differentials for specific aspects of knowledge regarding HIV, stigmatizing attitudes toward people with HIV/AIDS (PWHAs) and sexual behavior. In addition, the factors that affect stigmatizing attitudes toward PWHAs were investigated. The population of this study comprised of senior high students in Seoul, Korea. Eight high schools were selected randomly and 1566 adolescents participated in the survey. A total sample of 1548 cases (18 cases were excluded) was used for analysis. A self-administered questionnaire measuring their general and transmission and discriminatory attitudes was used. The level of HIV/AIDS knowledge among Korean adolescents was low, as indicated by a correct response rate of 54% (7.0 out of 13). The students answered correctly about HIV transmission by kissing at 50.2%, toilets at 59.4%, cup sharing at 57.4%, and daily school life at 60.5%. The level of discriminatory attitudes towards HIV-infected persons was high. Boys reported a higher proportion of sexual experience (7.0% vs. 2.6%, OR=2.89, p < 0.001). Only 39.0% used a condom during their last sexual encounter and more girls (53.3%) than boys (35.3%) reported using a condom. These findings highlight the need for increasing HIV knowledge, reducing HIV stigma, and providing sex education focusing on safer sex practices.

In South Korea, men who have sex with men (MSM) are rather understudied, but are known to be at high risk for human immunodeficiency virus infection (HIV)/acquired immunodeficiency syndrome (AIDS). This study was to access HIV/AIDS knowledge, attitudes, and risk behaviors, and to identify the factors of condom use in HIV prevention. We recruited 1070 MSM in Korea, using the Internet to maximize the confidentiality of the MSM. The prevalence of self-reported and sexually transmitted infections and HIV in the total sample was 10.7% and 2.7%, respectively. Factual knowledge and phobias regarding HIV/AIDS and self-efficacy were relatively high among the MSM. After controlling for age, education, marital status, and sexual identity, predictors of condom use at most recent anal sex included knowledge (OR = 1.25; p < 0.0001); self-efficacy (OR = 1.33; p = 0.02), additionally, having HIV testing (OR = 1.45; p = 0.02); and having a regular partner (OR = 0.53; p < 0.0001) were also positively associated with condom use. The intervention programs for MSM in Korea may need to take the idiosyncratic societal and cultural pressures of the region into consideration in order to reduce infection risk.

Methylphenidate is the most commonly used stimulant drug for the treatment of attention-deficit/hyperactivity disorder (ADHD). Research has found that methylphenidate is a “reinforcer” and that individuals with ADHD also abuse this medication. Nevertheless, the molecular consequences of long-term recreational methylphenidate use or abuse in individuals with ADHD are not yet fully known. Spontaneously hypertensive rats (SHR), the most validated and widely used ADHD animal model, were pretreated with methylphenidate (5 mg/kg, i.p.) during their adolescence (post-natal day [PND] 42–48) and tested for subsequent methylphenidate-induced conditioned place preference (CPP) and self-administration. Thereafter, the differentially expressed genes in the prefrontal cortex (PFC) and striatum of representative methylphenidate-treated SHRs, which showed CPP to and self-administration of methylphenidate, were analyzed. Genome-wide transcriptome profiling analyses revealed 30 differentially expressed genes in the PFC, which include transcripts involved in apoptosis (e.g. S100a9, Angptl4, Nfkbia), transcription (Cebpb, Per3), and neuronal plasticity (Homer1, Jam2, Asap1). In contrast, 306 genes were differentially expressed in the striatum and among them, 252 were downregulated. The main functional categories overrepresented among the downregulated genes include those involved in cell adhesion (e.g. Pcdh10, Ctbbd1, Itgb6), positive regulation of apoptosis (Perp, Taf1, Api5), (Notch3, Nsbp1, Sik1), mitochondrion organization (Prps18c, Letm1, Uqcrc2), and ubiquitin-mediated proteolysis (Nedd4, Usp27x, Ube2d2). Together, these changes indicate methylphenidate-induced neurotoxicity, altered synaptic and neuronal plasticity, energy metabolism and ubiquitin-dependent protein degradation in the brains of methylphenidate-treated SHRs, which showed methylphenidate CPP and self-administration. In addition, these findings may also reflect cognitive impairment associated with chronic methylphenidate use as demonstrated in preclinical studies. Future studies are warranted to determine the clinical significance of the present findings with regard to long-term recreational methylphenidate use or abuse in individuals with ADHD.

We examined gender differences in sexual behaviours, condom-related behaviours and attitudes to premarital sex in order to identify gender differences in young Korean singles aged 19 to 30 years. This study was based on data from the 2003 national survey of attitudes and behaviours towards AIDS in the Korean adult population, which contains information on a national sample of the general population aged 19 to 59 years. We selected 501 unmarried subjects between the ages of 19-30 from 1,995 respondents. The selection criterion for the subjects' age was based on the 2003 Korean mean age for marriage which was 29.8 for men and 27.0 for women. Gender differentials in sexual behaviour, condom use and related attitudes toward condom use were assessed. Although men initiated sexual practice earlier and had more multiple partners than women, both genders were equally likely to have engaged in inconsistent condom use, even when having sex with a high risk partner. These findings suggest that sex education focusing on condom use should be included in the school curricula. Implementation of early sexual education should start before the students initiate sexual activity to give them a chance to prepare gradu ally. Asia Pac J Public Health 2007; 19(2): 45-52.

This study investigated the status of sexual identity, perceived stigma, stress, depression, and suicidal ideation and attempts. It also examined how sexual identity and "coming out" affect stress, depression, and suicidal ideation and attempts. Suicidal ideation, psychological health status, and health-related behaviors were assessed using the Internet to maximize the confidentiality of the participants, men who have sex with men (MSM). The data were collected from a total of 873 MSM aged between 19 years and 59 years in 2014. Only 20.9% of the MSM had come out (18.0% voluntarily and 2.9% by others). The prevalences of perceived stress and depression among MSM were 46.7% and 42.7%, respectively, compared with 20.1% and 7.4% among general men. Approximately 32% of the MSM reported any suicidal ideation, and 3.3% had attempted suicide in the past year. The likelihood of suicidal ideation was significantly associated with being age 30-39 years [odds ratio (OR) = 1.8], high school or less (OR = 1.6), having been outed (OR = 5.2), feeling stressed (OR = 1.8), and feeling depressed (OR = 12.4) after sociodemographic factors and other perceptions were controlled for. The present study provides evidence that MSM are at an elevated risk for suicidal ideation and attempts with high stress and depression. Some risk factors were specific to being gay or bisexual in a hostile environment.

Scrub typhus, also called tsutsugamushi disease, is classified as a Group 3 disease in Korea according to the National Notifiable Diseases Surveillance Systems. It is an infectious disease transmitted to humans through the bite of mites that are infected with an intracellular parasite called Orientia tsutsugamushi (Family: Rickettsiaceae). This study aims to identify the demographic characteristics of the infected cases according to profession, region, gender, and onset period and provide a basic data for prevention and control of the disease in the infected patients. Between 2001 and 2010, 16,741 men (36.3%) and 29,373 women (63.7%) were reported to have been infected with scrub typhus, with men being 1.6 times less infected than women. When classified according to age, it was found that 4421 persons (9.6%) were under 40 years of age; 6601 (13.1%) in their 40s; 9714 (21.1%) in their 50s; 13,067 (28.3%) in 60s; 10,128 (22.0%) in their 70s; and 2723 (5.9%) aged 80 or more. The elderly (60 years or older) represented more than half of the infected cases. When the infections were classified according to region, it was found that the county residents had the major share of infection, with a total of 1583 infected cases (59.85).