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Heejin Ham,Sukju Jo,Jungim Jang,Sungmin Choi 대한기생충학열대의학회 2014 The Korean Journal of Parasitology Vol.52 No.2
Larvae, nymphs, and adult stages of 3 species of ixodid ticks were collected by tick drag methods in Seoul during June-October 2013, and their infection status with severe fever with thrombocytopenia syndrome (SFTS) virus was examined using RT-PCR. During the period, 732 Haemaphysalis longicornis, 62 Haemaphysalis flava, and 2 Ixodes nipponensis specimens were collected. Among the specimens of H. longicornis, the number of female adults, male adults, nymphs, and larvae were 53, 11, 240, and 446, respectively. Ticks were grouped into 63 pools according to the collection site, species, and developmental stage, and assayed for SFTS virus. None of the pools of ticks were found to be positive for SFTS virus gene.
( Heejin Ham ),( Ga-hyun Son ),( Keun-young Lee ),( Ji Eun Song ) 대한산부인과학회 2018 대한산부인과학회 학술대회 Vol.104 No.-
Objective: The purpose of this study was to compare the pregnancy outcomes of history-indicated cerclage (HIC) and transabdominal cerclage (TAC) in twin pregnancy. Methods: Retrospective chart review of twin pregnancies with HIC or TAC was performed. The study population underwent cerclage at Hallym University Kangnam Sacred Heart Hospital from 2007 to 2018. We compared the pregnancy outcomes between HIC and TAC group; The cerclage-to-delivery interval, the mean gestational age (GA) at cerclage, the mean GA at delivery, and birth weight were analyzed; The incidence of preterm birth (PTB) less than 28 weeks and 34 weeks, neonatal mortality were also compared between two groups. Results: Fifty-two patients were included; 19 patients underwent HIC, and 32 underwent TAC. There was no difference in the mean GA at cerclage between two groups (HIC, 13.73 weeks vs. TAC, 13.83 weeks, p=0.574). The mean GA at delivery in HIC group was 31.77 weeks, and that in TAC group was 35.85 weeks (p=0.003). There was statistically significant difference in the mean cerclage-to-delivery interval between two groups (HIC, 131.21days vs. TAC, 154days, p= 0.032) There were significant difference in neonatal birthweight between two groups (1st baby, 1846.84g vs. 2417.27g (p=0.004); 2nd baby 1732.11g vs. 2353.33, (p=0.001)), and neonatal mortality (HIC 4/19(21.1%) vs. TAC 1/33(3.0%), p=0.054). TAC group showed lower incidence of PTB < 28 weeks compared to HIC group (HIC 4/19 (21.1%) vs. TAC 1/33(3.0%), p=0.054). There was statistical difference in the incidence of PTB < 34weeks (HIC group, 8/19(42.1 %) vs. TAC group, 2/33(6.1 %), p=0.003). Conclusion: Both HIC and TAC were beneficial in prolonging pregnancy in twin pregnancy. TAC in twin pregnancy showed more favorable obstetric outcomes when compared to HIC.
Morphological analysis of honeybee mite Varroa spp. and Tropilaelaps spp. in some apiaries
Heejin Ham 한국예방수의학회 2024 예방수의학회지 Vol.48 No.2
The objective of this study was to detect and identify the bee mites that were related to the colony collapse disorder of the western species of honey bee. From July 6, 2023 to August 2, 2023, total 367 bee larvaes and 243 adults bee were observed by 100-fold and 200-fold magnification microscopy. As a result of direct visual and microscopic examination on honeybee bodies, larvae and pupae, a total of 2,688 bee mites were found. Of their bee mites, it were 9 of Tropilaelaps clareae, 130 of Varroa jacobsoni, and 2,549 of Varroa destructor, respectively. Tropilaelaps clareae showed 7 females, 1 male, and 1 larva, Varroa jacobsoni had 94 females, 5 males, and 31 larvae, and Varroa destructor had 2,162 females, 346 males, and 41 larvae, respectively. In order to reduce the damage of the apiary caused by bee mites, it is mainly dependent on pharmaceutical control, continuously.
Heejin Ham 한국예방수의학회 2024 예방수의학회지 Vol.48 No.2
Pathogenic Escherichia coli strains are known to cause edema disease (ED) and postweaning diarrhea (PWD) in piglets. Although the exact mechanisms of pathogenicity that lead to ED-PWD remain to be elucidated, we investigated whether another E. coli adhesin, the plasmid-encoded adhesin involved in diffuse adherence (AIDA) might also be present in ED-PWD-causing E. coli isolates. It was showed that E. coli strains attach to HEp-2 cell assay in three different patterns. Twenty-two isolates were from faeces of preweaned pigs and 36 isolates were from faeces of postweaned pigs. The base sequences for specific oligonucleotide primers of PCR used in this study were constructed based on the regions of conserved sequences between forward (5′-3′) ACAGTATCATATGGAGCCA and reverse (5′-3′) TGTGCGCCAGAACTATTA. Product size was 585 base pairs. A total of 58 AIDA-positive E. coli were used for cell adherence pattern analysis of HEp-2 cell assay. Forty three isolates showed three distinct patterns that were localized adherence (LA), diffuse adherence (DA) and aggregative adherence (AA) patterns respectively. But fifteen isolates were nonadherent. LA (14 isolates) pattern was the most common, followed by DA (13 isolates) and AA (9 isolates) pattern. And three isolates showed a combination of the LA and AA patterns and 4 isolates showed a combination of the DA and AA patterns. Escherichia coli strains that cause nonbloody diarrhea in infants are known to present three distinct patterns of adherence to epithelial cells, namely, localized (LA), diffuse (DA), and aggregative (AA) adherence.
Ham, Heejin,Jang, Jungim,Jo, Sukju,Oh, Younghee,Pak, Sonil 대한미생물학회 2014 Journal of Bacteriology and Virology Vol.44 No.3
For our survey of the infection frequency and mixed infection of the viruses causing acute respiratory syndromes, we analyzed those viruses from acute respiratory patients in Seoul. Total 1,038 specimens of oropharyngeal swab were tested by the real-time polymerase chain reaction (PCR) kit (Kogenebiotech, Korea) from Jan. to Dec. in 2013. Virus detection rate causing acute respiratory infection was 46% (476/1,038). The most frequently isolated virus was only hRV (21.6%, 103/476), followed by only ADV (8.96%, 93/476), only IFV A (H3N2) (18.1%, 86/476), and only hCoV (7.8%, 37/476) etc. Most of acute respiratory viruses had severe fever. Infection frequency information and mixed infection status on respiratory viruses circulating in Seoul will be helpful for the management of acute respiratory infection and for epidemiological continuous studies.