Hong, Ki Bae;Shin, Youn Shim;Roh, Eui-Jung;Chung, Eun Hee
Clinical and Experimental Pediatrics
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v.51
no.7
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pp.729-735
/
2008
Purpose : Chlamydia trachomatis is one of the most common sexually transmitted diseases and is also a cause of pneumonia in infants. Respiratory infections by respiratory viruses are also common for infants. The objectives of this study were to identify the clinical manifestations and to determine the prevalence of C. trachomatis respiratory infections and coinfections by respiratory viruses in infants younger than 6 months of age. Methods : For this study, we enrolled 6 months or younger infants who were admitted to the Dankook University Hospital between January 2002 and July 2007, with respiratory symptoms. Nasopharyngeal aspirates or throat swabs were collected within s d of hospitalization and C. trachomatis was detected using polymerase chain reaction (PCR). Patients who tested positive underwent multiplex PCR for respiratory viruses. Results : A total of 690 patients underwent chlamydial PCR testing and 36 (5.2%) had positive results. Of the 36, 28 (78%) were male; 30 were vaginally delivered. From the 36 patients positive for C. trachomatis, 26 underwent multiplex respiratory viral PCR; 12 were coinfected with viruses. Respiratory syncytial virus (RSV) was the most frequent pathogen that was detected in 6 patients. Increased C-reactive protein and fever were significant in patients coinfected with respiratory viruses. Conclusion : C. trachomatis can infected in infants delivered by cesarean section as well as in 6 months old or younger infants. Infant with C. trachomatis respiratory infections can also be coinfected with respiratory infection also coinfected with respiratory viruses. Further studies are needed to better understand the prevalence rates of the this infection and its coinfection rate with respiratory viruses.
Yun, Byung Ho;Lee, Hee Chul;Chun, Jung Mi;Yoon, So Young;Lee, Woo Gill;Shin, Son Moon
Clinical and Experimental Pediatrics
/
v.48
no.7
/
pp.723-730
/
2005
Purpose : This study was performed to characterize the etiology and clinical features of acute viral lower-respiratory tract infections(LRI). Methods : Etiologic agents and clinical features of acute viral LRI were studied from October. 2003 through March. 2004 in hospitalized children with LRI(253 cases) at Samsung Cheil Hospital. The viruses were identified by indirect immunofluorescent method. Medical records of patients with proven viral LRI were reviewed retrospectively. Results : Ninety two cases(36.4%) were confirmed as viral infections. The identified pathogens were respiratory syncytial virus(RSV, 76.0%), adenovirus(ADV, 12.0%), influenza virus type A(INFA, 9.8 %), influenza virus type B(INFB, 1.1%) and parainfluenza virus(PIV, 1.1%). Eight four point eight% of patients were younger than 2 years of age. Clinical diagnosis of LRI were pneumonia(56.5%), bronchiolitis(35.9%), tracheobronchitis(4.3%) and croup(3.3%). The clinical symptoms and signs were cough(98.8%), rhinorrhea(82.6%), fever(70.7%), rale(67.4%), wheezing(29.3%), chest retraction(28.3%) and cyanosis(4.3%). The severe respiratory symptoms and signs were more common in RSV-infected patients, even cyanosis could be observed. Seventeen point four percent of patient had fever of $38.5^{\circ}C$ or higher and their most common etiologic agent was INFA(66.7%). Twenty three point nine percent had fever more than 5 days and common etiologic agent was INFA(77.8%). The elevated WBC count($>14{\times}10^3/{\mu}L$) was in 14.1%, and common etiologic agents were INFA(22.2%) and ADV(18.2%). C-reactive protein(CRP >4.0 mg/dL) was increased in 13.0%, and common in ADV(63.6 %). Increased aspartate aminotransferase(AST)/alanine aminotransferase(ALT) was detected in 10.9%, and the most common etiologic agent was RSV(12.9%). Conclusion : The common agents of acute viral LRI were RSV, ADV and INF, respectively. Because the etiologic agents present variable clinical features, it may be helpful to treat and to evaluate acute viral LRI that we should understand their etiologic variability.
Jung, Da Eun;Kim, Byeong Eui;Chung, Ju Young;Kim, Jeong Yeon;Ma, Sang Hyuk;Kim, Chang Keun
Clinical and Experimental Pediatrics
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v.46
no.8
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pp.763-768
/
2003
Purpose : This study was conducted to investigate the pulmonary cellular profiles and IL-8 levels in patients with post-measles wheezing. Methods : Twelve previously healthy infants with a minimum of three episodes of wheezing after measles pneumonia(Measles wheezing, median age, 1.3 years) were recruited by a retrospective examination of hospital records. They underwent bronchoalveolar lavage(BAL) with flexible bronchoscopy, and high-resolution computed tomography(HRCT) with a mean six(1-15) months interval. Comparisons were made with seven normal controls(Control, median age : 7.4 years). BAL cell counts and differentials were determined. IL-8 levels also were measured by ELISA. Results : The BAL cellular profiles were characterized by a significantly increased percentage of neutrophils in the Measles wheezing group(median 16.0%) compared to the control group(median 3.8 %)(P<0.01). IL-8 levels were markedly increased in the Measles wheezing group($mean{\pm}SD$, $512.7{\pm}324.0pg/mL$) compared to the control group($41.7{\pm}67.7pg/mL$)(P<0.01). Furthermore, IL-8 levels correlated significantly(r=0.816, P=0.001) with neutrophil percentages in BAL fluids in the Measles wheezing group. Abnormal HRCT findings were mosaic perfusion, bronchiectasis, bronchial wall thickening, and decreased vascularity. Conclusion : These results suggest that pulmonary neutrophils and IL-8 may play an important role in the pathogenesis of the post-measles wheezing.
Purpose : Ciliary abnormalities of the respiratory system usually accompany recurrent or persistent respiratory diseases such as paranasal sinusitis, bronchiectasis, rhinitis, and/or otitis media, since they cause certain derangements in ciliary cleaning activities. This disease is usually inherited by autosomal recessive trait, but may also be found to be acquired or transient in rare cases after heavy exposure to pollutants, cigarette smoking or severe infection. We performed this study in children with frequently recurrent or persistent respiratory diseases to clarify if the ciliary abnormalities are preceding factors. Methods : We enrolled 17 children with suspected respiratory ciliary abnormalities. The indications for evaluation of ciliary ultrastructure were recurrent or persistent respiratory infections. Children with immunologic abnormalities were excluded. From August 2000 to July 2003, we performed a biopsy on nasal mucosa and examined the structure of ciliary status by using an electron microscope. Results : Of the subjects, there were seven males and 10 females, aged 2 to 10 years. Out of the 17 subjects, 12 cases of chronic paranasal sinusitis, nine chronic coughs, nine frequent upper respiratory infections, seven cases of recurrent otitis media, four cases of recurrent pneumonia, and four cases of bronchial asthma were found. Out of the 17 cases on which histologic examinations were conducted, four cases showed pathologic findings, including one case of inner dynein arm defect, one of microtubular transposition, one of supernumerous tubules, and one singlet, respectively. Conclusion : It is essential for differential diagnosis and effective treatment to identify the abnormalities of ultrastructure of nasal cilia in children with symptoms of frequently recurrent or persistent respiratory diseases, if immunodeficiency or respiratory allergy could be excluded.
Purpose : Human metapneumovirus(hMPV) is a respiratory viral pathogen that causes a wide spectrum of illnesses, ranging from asymptomatic infection to severe bronchiolitis. The virus has been identified world widely, but so far it has not been published in Korea. Methods : We obtained clinical samples by nasopharyngeal aspiration from 218 children hospitalized due to acute lower respiratory tract infections at Soonchunhyang University Hospital in Cheonan from October, 2004 to April, 2005. We designed specific primers from conserved region of fusion glycoprotein of hMPV. Total RNA was extracted and RT-PCR was performed, and single specific 423 bp product was obtained. The PCR product was confirmed to be fusion glycoprotein RNA by sequencing. Results : We detected hMPV in 15(6.9 percent) of the 218 hospitalized children. The infected children comprised nine boys and six girls; their mean age was 2.8 years(5 mo-12 yrs) and they were diagnosed with pneumonia(60 percent), bronchiolitis(33.3 percent), croup(6.6 percent). The number of cases of detected hMPV in Korea increased dramatically during the period from March to May 2005. Conclusion : hMPV is circulating in Korean children and is associated with respiratory tract infection. Additional studies are required to define the epidemiology and the extent of diseases in the general population caused by hMPV.
The newborn human is the only mammalian whose mother does not have a food supply ready for it's offspring at birth. From two to four days usually elapse before the mother's supply If milk appears, and during this period, some kind of artificial feeding should be supplied to the infants. Because of this factor, there has been continued debate fog the past hundreds of years as to when the first feeding should be started Accordingly, many experiments were carried out by scholars and because of these, Pre-lateral feedings were believed to be necessary. Many types of pre-lateral feedings were tried and the conclusion was reached that glucose water was the best food for the first infants'feedings. Traditionally, This has been started 12 hours after birth. The causes for the 12 hours delay were thought to (1) provide rest for the infants: (2) prevent regurgitation ana vomiting which tended to be prevalent during this tine: (3) in cases of low weight infants, prevention of aspiration pneumonia. From recent studies of newborn physiology and as pediatric medicine has been rapidly advancing, many studies hare been carried out concerning the improvement of infant nutrition and the early feeding of infants has been emphasized. This author believes it would be very beneficial to try two different kinds of feedings for the infant. (1) experimental feedings ana (2) comparative feeding, and during this period to investigate and compare the infants blood sugar level, hematocrit, gamma globulin level weight changes and to observe the infant reaction ill order to search for a more desirable feeding program. This study was conducted from January to March 1974 with data related to 40 healthy newborn infants (male 21, female 19: weight, 2.79∼4.20㎏ : gestation, 39∼40 weeks) born at Ewha Womens University Hospital and the results obtained were as follows : 1. At time of birth the blood sugar level from the cord sample averaged 88.99㎎/100㎖, but the blood sugar level rapidly dropped after 2 to 3 hours and reached the lowest point after 10 to 11 hours (54.48㎎/100㎖) and rose again by the 24 hour time period (76.80㎎/100㎖). Changes in the blood sugar level of the experiments: groups and the compare-five group was not significantly different until the 6 to 7 hour period, but by the 10 to 11 hour period the blood sugar levels of the experimental group (49,10㎎/100㎖) and the comparative group (49.70㎎/100㎖) were lower than the remainder of the experimental groups. 9. There ware no significant weight changes between the two groups. Average weight at birth was 3.35㎏, but at the 24 hours period birth weight averaged 3.29㎏. (1.8% reduction of birth weight). It continually lowered until at 48 hours, average weight was 3.26㎏ (2.7% reduction from birth weight.) 3. Hematocrit readings showed no significant difference between the groups. Hematocrit, the average value at birth, was 28.07% and abruptly elevated to average 64.35% at the 2 to 3 hour period, then slowly lowered to an average of 59.67% at the 6 to 7 hour period, 55.10% at the 10 to 11 hour period, ana 53.70% at the 24 hour period. 4. At birth, average gamma globulin value averaged 1,39㎎/100㎖. and at the 24 hour period averaged 1,52㎎/100㎖ revealing no significant difference between the two feeding groups. 5. Such factors as voiding, passing of meconium, regurgitation and vomiting showed no significance between the two feeding groups. However, the number of infants voiding and passing meconium in the experimental groups during the first 12 hours was slightly greater. In general there was an increased tendency for regurgitation and. vomiting among a small group of the infants during the first 24 hours which thereafter decreased. 6. Fluid intake averaged 24.38cc at the first feeding and increased to average 30.48cc at the third feeding and further increased to 73. 00cc at the fifteenth feeding. Finally it was suggested that the most reasonable method of early feeding is to give less than 25cc of 5% glucose water and/or 8% powdered milk at 8 to 9 flours after birth in order to prevent hypoglycemia and dehydration.
Kang, Jeong Sik;Kim, Sa-Ra;Kim, Dong Wook;Song, Tae Won;Kim, Nam Hee;Hwang, Jong Hee;Moon, Jin Soo;Lee, Chong Guk
Clinical and Experimental Pediatrics
/
v.52
no.1
/
pp.81-86
/
2009
Purpose : Febrile convulsions are classified into simple or complex types, the latter being characterized by increased risk of recurrence and progression to epilepsy. This study aimed to delineate the clinical characteristics of complex febrile convulsions. Methods : Between January 2003 and December 2006, 550 children were diagnosed with febrile convulsions at the Department of Pediatrics, Ilsan Paik Hospital. Their medical records were retrospectively reviewed for comparison between simple and complex febrile convulsions, and clinical findings of complex febrile convulsions were clarified. Results : Our subjects comprised a male-to-female ratio of 1.64:1; the age range was from 8 months to 8 years. Simple febrile convulsions comprised 432 cases, i.e., 4 times as many as complex febrile convulsions (118 cases). The causes of febrile illness included acute pharyngotonsillitis (357 cases, 64.9%), pneumonia (55 cases, 10.0%), acute gastroenteritis (37 cases, 6.7%), and otitis media (20 cases, 3.6%). We did not find any significant difference between simple and complex febrile convulsions in most clinical parameters such as gender, age, family history of febrile convulsions, and cause of febrile illness. Regarding subtypes of complex febrile convulsions, repeated convulsions were the most frequent (72.0%), followed by prolonged convulsions (16.9%) and focal convulsions (5.1%). Conclusion : We have reported here the clinical features of complex febrile convulsions. Although the results did not show any significant difference between simple and complex febrile convulsions in most clinical parameters such as gender, age, family history of febrile convulsion, and cause of febrile illness, further studies are essential to delineate complex febrile convulsions.
Park, Gwi Ok;Kim, Ji Hyun;Lee, Jae Hee;Lee, Jung Ju;Yun, Sin Weon;Lim, In Seok;Lee, Dong Keun;Choi, Eung Sang;Yoo, Byoung Hoon;Lee, Mi Kyung;Chae, Soo Ahn
Clinical and Experimental Pediatrics
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v.52
no.3
/
pp.330-338
/
2009
Purpose : The causes of acute lower respiratory tract infection (ALRTI) are mostly attributable to viral infection, including respiratory syncytial virus (RSV), parainfluenza virus (PIV), influenza virus A/B (IFV A/B), or adenovirus (ADV). Several Korean studies reported human metapneumovirus (hMPV) as a common pathogen of ALRTI. However, studies on seasonal distribution and clinical differences relative to other viruses are insufficient, prompting us to perform this study. Methods : From November 2006 to October 2007, we tested nasopharyngeal aspiration specimens in children hospitalized with ALRTI with the multiplex reverse transcriptase-polymerase chain reaction to identify 6 kinds of common pathogen (hMPV, RSV, PIV, IFV A/B, and ADV). We analyzed positive rates and clinical features by respiratory chart review. Results : We detected 38 (8.4%) hMPV-positive cases out of 193 (41.8%) virus-positive specimens among 462 patients. HMPV infection prevailed from March to June with incidence peaking in April. HMPV-positive patients were aged 15 years (76.3%), and the ratio of boys to girls was 1.2:1. The median age was 27 months. HMPV primarily caused pneumonia (76.3 %) (P=0.018). Average hospitalization of HMPV-associated ALRTI patients was 5.8 days. In addition, they showed parahilar peribronchial infiltration (100%) on chest X-ray, normal white blood cell count (73.7%), and negative C-reactive protein (86.8 %) (P>0.05). All hMPV-positive patients recovered without complication. Conclusion : HMPV is a common pathogen of ALRTI in Korean children, especially in 1-5 year olds, from March to May. Immunocompetent children diagnosed with hMPV-associated ALRTI may have a good prognosis.
Purpose : The aim of this study was to identify mutations associated with macrolide resistance in Mycoplasma pneumoniae (MP) and to establish a cultural method to determine antimicrobial susceptibility. Methods : Nasopharyngeal aspirates (NPAs) were collected from 62 children diagnosed with MP pneumonia by a serologic method or polymerase chain reaction. The 23S rRNA and L4 ribosomal protein genes of MP were amplified and sequenced. To identify mutations in these 2 genes, their nucleotide sequences were compared to those of the reference strain M129. MP cultivation was carried out for 32 (28 frozen and 5 refrigerated) NPAs and M129 strain using Chanock's glucose broth and agar plate in a 5% $CO_2$ incubator at $37^{\circ}C$ and examined at 2-3 day intervals for 6 weeks. Results : Among the 62 specimens, 17 had M144V mutations in ribosomal protein L4. The A2064G mutation was observed in 1 specimen; its 23S rRNA gene was successfully sequenced. Culture for MP was successful from the M129 strain and 2 of the 5 NPAs that were refrigerated for no longer than 3 days. However, MP did not grow from the 28 NPAs that were kept frozen at $-80^{\circ}C$ since 2003. Conclusion : We found the M144V mutation of L4 protein to be common and that of domain V of 23S rRNA gene was relatively rare among MP. Studies on the prevalence of macrolide-resistant MP and the relationship between the mutations of 23S rRNA gene and ribosomal protein L4 will aid in understanding the mechanism of macrolide resistance in MP.
Cho, Ky Young;Lee, Jung Ah;Cho, Sung Eun;Kim, Nam Hee;Lee, Jin A;Hong, Ki Sook;Lee, Hoan Jong;Kim, Kyung Hyo
Clinical and Experimental Pediatrics
/
v.50
no.2
/
pp.151-156
/
2007
Purpose : Streptococcus pneumoniae is a major etiologic agent for pneumonia, meningitis, otitis media, and sepsis among young children. Multi-drug resistant strains have raised great concern worldwide, thus the importance of prevention with vaccines has been emphasized. However, vaccines may force the appearance of pneumococcal infections by nonvaccine serotypes. Thus, distribution of pneumococcal serotypes should be monitored to estimate vaccine efficacy. We used a new and efficient multibead assay in determining pnemococcal serotypes. Methods : From January to February 2005, 643 children were recruited from ten day care centers to isolate pneumococci from their oropharynx. Pneumococcal serotyping was performed on 62 pneumococcal isolates from 60 children by multibead assay. This immunoassay required two sets of latex particles coated with pneumococcal polysaccharides and serotype-specific antibodies. Twenty four newly developed monoclonal antibodies specific for common serotypes and a pool of polyclonal rabbit sera for some of the less common serotypes were used. Results : The most prevalent pneumococcal serotypes were serotype 6A, 19A, 19F, 23F, and 11A/D/F which accounted more than 50 precent of all the 62 pneumococcal isolates. We found that multibead assay can be performed very rapidly and objectively. Conclusion : This multibead immunoassay was very useful in serotyping clinical isolates of S. pneumoniae because it was simple, reliable and fast.
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