Shifting in Seroprevalence of HBsAg and Anti-HCV during Recent 10 Years in Adults Resident in Daegu and Gyeongbuk Province

Lee, Kyung In; Park, Kyung Sik; Seo, Hye Jin; Kim, Tae Yul; Kim, Eun Soo; Jang, Byoung Kuk; Chung, Woo Jin; Cho, Kwang Bum

doi:10.4166/kjg.2011.58.2.82

Cited by 5 publications

(5 citation statements)

References 16 publications

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“…The seropositivity of HBsAg in this study increased with age from 20 to 40 years old, then decreased thereafter, which is comparable to other reports [Chae et al, ; Kim et al, ]. The reasons for decreasing seroprevalence in those over age 50 may be related to the natural loss of HBsAg and death from liver diseases such as cirrhosis or hepatocellular carcinoma [Lee et al, ]. Concerning the geographic differences of HBsAg seroprevalence in Korea, a previous study reported similar HBsAg seropositivity in several administrative areas with the exception of Jeju, where HBsAg seropositivity was approximately three times higher and anti‐HBs positivity significantly lower than those of the national average in 1998 [Lee et al, ; Kang et al, ].…”

Section: Discussionsupporting

confidence: 87%

Nationwide seroepidemiology of hepatitis B virus infection in South Korea in 2009 emphasizes the coexistence of HBsAg and anti‐HBs

Lee

Cho

Jeong

et al. 2013

Journal of Medical Virology

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Hepatitis B virus (HBV) infection is the major cause of chronic liver disease in Korea. This study investigated the seroprevalence of HBV infection with an emphasis on the coexistence of hepatitis B surface antigen (HBsAg) and antibody (anti-HBs). In all, 290,212 people undergoing health check-up examinations in 29 institutions during 2009 were recruited. The crude seroprevalences of HBsAg and anti-HBs was adjusted by age, sex, and geographic area using the 2009 estimated population of Korea. The adjusted seroprevalences of HBsAg and anti-HBs was 4.0% and 73.5%, respectively. Males showed higher HBsAg positivity and lower anti-HBs positivity than females (P<0.001). HBsAg positivity increased with age from 3.5% in people 20-29 years old to 4.8% in people 40-49 years old, followed by a decrease in people ≥ 50 years old. HBsAg positivity in Southern provinces (4.5%) including Jeju (5.9%), was significantly higher than that in Central provinces (3.6%; P<0.001). Interestingly, HBsAg and anti-HBs coexisted in 0.1% of the total subjects and in 2.9% of the HBsAg-positive group, showing distinct age distribution and higher alanine aminotransferase levels than those of the group positive for only HBsAg. In conclusion, the seroprevalence of HBsAg and anti-HBs in Korea varies significantly by age, sex and geographical location and coexisted in 2.9% of HBsAg-positive subjects. Continuous monitoring of seroepidemiology may facilitate the eventual eradication of HBV infection.

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Section: Discussionsupporting

confidence: 87%

Nationwide seroepidemiology of hepatitis B virus infection in South Korea in 2009 emphasizes the coexistence of HBsAg and anti‐HBs

Lee

Cho

Jeong

et al. 2013

Journal of Medical Virology

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“…In Korea, the seropositivity of HBsAg in this study increased with age from 20 to 40 years old, and then decreased thereafter, which is comparable to other reports (Chae et al, 2009;Kim et al, 2009;Lee et al, 2013). The reasons for decreasing seroprevalence in those over age 50 may be related to the natural loss of HBsAg and death from liver diseases such as cirrhosis or hepatocellular carcinoma (Lee et al, 2011).…”

Section: Discussionsupporting

confidence: 85%

Age-Period-Cohort Analysis of Liver Cancer Mortality in Korea

Park

Jee²

2016

Asian Pacific Journal of Cancer Prevention

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Background: Liver cancer is one of the most common causes of death in the world. In Korea, hepatitis B virus (HBV) is a major risk factor for liver cancer but infection rates have been declining since the implementation of the national vaccination program. In this study, we examined the secular trends in liver cancer mortality to distinguish the effects of age, time period, and birth cohort. Materials and Methods: Data for the annual number of liver cancer deaths in Korean adults (30 years and older) were obtained from the Korean Statistical Information Service for the period from 1984-2013. Joinpoint regression analysis was used to study the shapes of and to detect the changes in mortality trends. Also, an age-period-cohort model was designed to study the effect of each age, period, and birth cohort on liver cancer mortality. Results: For both men and women, the age-standardized mortality rate for liver cancer increased from 1984 to 1993 and decreased thereafter. The highest liver cancer mortality rate has shifted to an older age group in recent years. Within the same birth cohort group, the mortality rate of older age groups has been higher than in the younger age groups. Age-period-cohort analysis showed an association with a high mortality rate in the older age group and in recent years, whereas a decreasing mortality rate were observed in the younger birth cohort. Conclusions: This study confirmed a decreasing trend in liver cancer mortality among Korean men and women after 1993. The trends in mortality rate may be mainly attributed to cohort effects.

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“…In particular, P. guillermodeltoroi was almost exclusively found in peri-urban sites and therefore we suggest that that specific population from the urban core could be at high risk in such a small habitat. Lee et al (2019) reported a minimum size of suitable habitat of 0.0039 km 2 for terrestrial fireflies from Daegu and Gyeongbuk provinces in South Korea. In contrast, Picchi et al (2013) reported green areas greater than 0.023 km 2 for two species of fireflies from the city of Turin, Italy.…”

Section: Discussionmentioning

confidence: 99%

“…Slope has been found to be a relevant variable of fireflies’ habitats because larvae are frequent on soggy ground and around ponds, marshes and streams which are usually found in flat plains or very gentle slopes ( Lloyd, 2002 ; Kazama et al, 2007 ; Lee et al, 2019 ). Therefore, we expected that fireflies from Morelia would also be more frequent in flat plains, which cover about half of the city and used to be rice paddy fields ( López et al, 2001 ; López Núñez & Pedraza Marrón, 2012 ).…”

Section: Discussionmentioning

confidence: 99%

Living on the edge: urban fireflies (Coleoptera, Lampyridae) in Morelia, Michoacán, Mexico

Pérez-Hernández,

Gutiérrez Mancillas,

del-Val

et al. 2023

PeerJ

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Fireflies (Coleoptera, Lampyridae) are a globally threatened group of insects due to habitat loss and fragmentation, light pollution, climate change and pesticides. However, against all odds, some firefly populations persist in urbanized environments where all four of these factors are present simultaneously. In this work, we compiled several data sources to document the diversity of fireflies in the urbanized area of Morelia, characterize their current habitats, and determine the main stressors affecting these bioluminescent insects. We found seven genera and 26 species of fireflies (19 nocturnal, seven diurnal) associated with 32 urban, peri-urban and extra-urban areas; at least, 14 are new records for Michoacán, and the list for the state now includes nine genera and 41 species. Five additional sites were documented as extinction sites. We compared the characteristics of these five sites with those of the sites with extant populations. We found that in Morelia, fireflies are mainly associated with areas that have high to moderate proportions of vegetation cover, are near water bodies, have very gentle to moderate slopes, and are exposed to low levels of light pollution. In contrast, the extinction sites showed high proportions of artificial surfaces and high levels of light pollution. Because some fireflies are considered bioindicators of ecosystem integrity as they are associated to specific habitats, are highly diverse and due to their sensitivity to environmental changes, we consider that sites from Morelia’s urban core and extinction sites show the highest levels of environmental degradation, threatening most fireflies and other insects living in the urban core with local extinction. At the same time, our results also suggest that implementing conservation strategies and sustainable planning for the urban development of Morelia in the short term could allow fireflies and other vital elements of the city’s insect communities to persist for future generations. Restoration and conservation of green areas and nighttime environments are essential for biodiversity and human health, especially in intra-urban zones.

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Shifting in Seroprevalence of HBsAg and Anti-HCV during Recent 10 Years in Adults Resident in Daegu and Gyeongbuk Province

Abstract: The seroprevalence of HBsAg in Daegu/Gyeongbuk province was 4.8% and showed no difference through the time period of 10 years. The seroprevalence of anti-HCV was 0.5% and also showed no difference through the time periods.

Cited by 5 publications

References 16 publications

Nationwide seroepidemiology of hepatitis B virus infection in South Korea in 2009 emphasizes the coexistence of HBsAg and anti‐HBs

Nationwide seroepidemiology of hepatitis B virus infection in South Korea in 2009 emphasizes the coexistence of HBsAg and anti‐HBs

Age-Period-Cohort Analysis of Liver Cancer Mortality in Korea

Living on the edge: urban fireflies (Coleoptera, Lampyridae) in Morelia, Michoacán, Mexico

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