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Epidemiological comparison of three Mycoplasma pneumoniae pneumonia epidemics in a single hospital over 10 years.

Kim EK, Youn YS, Rhim JW, Shin MS, Kang JH, Lee KY - Korean J Pediatr (2015)

Bottom Line: In our comparison of the three epidemics, we found no differences in mean age, the male-to-female ratio, hospital stay, or the rate of seroconverters during hospitalization.All three epidemics began in early summer and peaked in September 2003 and 2011 and in October 2006 and then gradually decreased until the next year's spring season, although the 2006 epidemic extended further into 2007.The pattern of 3 recent epidemics was similar in demographic characteristics and seasonality with some variations in each outbreak.

View Article: PubMed Central - PubMed

Affiliation: Department of Pediatrics, The Catholic University of Korea College of Medicine, Seoul, Korea.

ABSTRACT

Purpose: Mycoplasma pneumoniae (MP) pneumonia epidemics have occurred in 3- to 4-year cycles in Korea. We evaluated the epidemiologic characteristics of MP pneumonia in Daejeon, Korea, from 2003 to 2012.

Methods: We retrospectively analyzed 779 medical records of children (0-15 years of old) with MP pneumonia admitted to our institution and compared the data from 3 recent epidemics.

Results: In 779 patients, the mean age and male-to-female ratio were 5.0±2.2 years and 1:1, and most cases were observed in autumn. There were three epidemics during the study period, in 2003, 2006-2007, and 2011. In our comparison of the three epidemics, we found no differences in mean age, the male-to-female ratio, hospital stay, or the rate of seroconverters during hospitalization. All three epidemics began in early summer and peaked in September 2003 and 2011 and in October 2006 and then gradually decreased until the next year's spring season, although the 2006 epidemic extended further into 2007. The peak age groups in the children in 2003 and 2006 were 3-6 year-olds (57.5% and 56%, respectively), but in the 2011 epidemic, the peak group was 1-4 year-olds (46.5%). The proportion of the <2 years of age group was 20%, 15.7% and 28.8%, and >10 years of age group was 5.2%, 13.8%, and 14.8% of total patients, respectively.

Conclusion: MP pneumonia outbreaks occurred every 3-4 years. The pattern of 3 recent epidemics was similar in demographic characteristics and seasonality with some variations in each outbreak.

No MeSH data available.


Related in: MedlinePlus

Monthly cases of total Mycoplasma pneumoniae pneumonia patients.
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Figure 4: Monthly cases of total Mycoplasma pneumoniae pneumonia patients.

Mentions: Annual cases during the study period are shown in Fig. 2. There were markedly fluctuating frequencies over the years. Epidemics were noted in 2003 (149 cases; 19.1% of total subjects), in 2006-2007 (241 cases; 30.1%, 131 cases in 2006), and 2011 (258 cases; 33.1 %). Thus, epidemics occurred at intervals of 3-4 years during the study period (Fig. 2). The monthly cases for the total study period are shown in Fig. 3. In the 2003 and 2011 epidemics, the epidemic period was within a year, but it was longer in 2006-2007. In total cases, the highest number of the patients was seen in September (136 cases, 17.5%), and nearly half of patients were seen between September and November (autumn, 377 cases, 48.4%). There were relatively fewer patients seen from February to July. In seasonal frequency, the largest number of cases was seen in the autumn, followed by winter (December to February, 166 cases, 21.3%), summer (June to August, 149 cases, 19.1%), and spring (March to May, 87 cases, 11.2%) (Fig. 4).


Epidemiological comparison of three Mycoplasma pneumoniae pneumonia epidemics in a single hospital over 10 years.

Kim EK, Youn YS, Rhim JW, Shin MS, Kang JH, Lee KY - Korean J Pediatr (2015)

Monthly cases of total Mycoplasma pneumoniae pneumonia patients.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4481037&req=5

Figure 4: Monthly cases of total Mycoplasma pneumoniae pneumonia patients.
Mentions: Annual cases during the study period are shown in Fig. 2. There were markedly fluctuating frequencies over the years. Epidemics were noted in 2003 (149 cases; 19.1% of total subjects), in 2006-2007 (241 cases; 30.1%, 131 cases in 2006), and 2011 (258 cases; 33.1 %). Thus, epidemics occurred at intervals of 3-4 years during the study period (Fig. 2). The monthly cases for the total study period are shown in Fig. 3. In the 2003 and 2011 epidemics, the epidemic period was within a year, but it was longer in 2006-2007. In total cases, the highest number of the patients was seen in September (136 cases, 17.5%), and nearly half of patients were seen between September and November (autumn, 377 cases, 48.4%). There were relatively fewer patients seen from February to July. In seasonal frequency, the largest number of cases was seen in the autumn, followed by winter (December to February, 166 cases, 21.3%), summer (June to August, 149 cases, 19.1%), and spring (March to May, 87 cases, 11.2%) (Fig. 4).

Bottom Line: In our comparison of the three epidemics, we found no differences in mean age, the male-to-female ratio, hospital stay, or the rate of seroconverters during hospitalization.All three epidemics began in early summer and peaked in September 2003 and 2011 and in October 2006 and then gradually decreased until the next year's spring season, although the 2006 epidemic extended further into 2007.The pattern of 3 recent epidemics was similar in demographic characteristics and seasonality with some variations in each outbreak.

View Article: PubMed Central - PubMed

Affiliation: Department of Pediatrics, The Catholic University of Korea College of Medicine, Seoul, Korea.

ABSTRACT

Purpose: Mycoplasma pneumoniae (MP) pneumonia epidemics have occurred in 3- to 4-year cycles in Korea. We evaluated the epidemiologic characteristics of MP pneumonia in Daejeon, Korea, from 2003 to 2012.

Methods: We retrospectively analyzed 779 medical records of children (0-15 years of old) with MP pneumonia admitted to our institution and compared the data from 3 recent epidemics.

Results: In 779 patients, the mean age and male-to-female ratio were 5.0±2.2 years and 1:1, and most cases were observed in autumn. There were three epidemics during the study period, in 2003, 2006-2007, and 2011. In our comparison of the three epidemics, we found no differences in mean age, the male-to-female ratio, hospital stay, or the rate of seroconverters during hospitalization. All three epidemics began in early summer and peaked in September 2003 and 2011 and in October 2006 and then gradually decreased until the next year's spring season, although the 2006 epidemic extended further into 2007. The peak age groups in the children in 2003 and 2006 were 3-6 year-olds (57.5% and 56%, respectively), but in the 2011 epidemic, the peak group was 1-4 year-olds (46.5%). The proportion of the <2 years of age group was 20%, 15.7% and 28.8%, and >10 years of age group was 5.2%, 13.8%, and 14.8% of total patients, respectively.

Conclusion: MP pneumonia outbreaks occurred every 3-4 years. The pattern of 3 recent epidemics was similar in demographic characteristics and seasonality with some variations in each outbreak.

No MeSH data available.


Related in: MedlinePlus