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STD (Sexually Transmitted Diseases) Reports
October 2007
Monthly STD Report − October 2007
St. Charles County Department of Community Health and the Environment
Alison Tucker, MSc
For the month of October, St. Charles County had 47 laboratory confirmed STD cases (as of 11/19/07), which is similar to numbers seen in the previous months of October (44 cases in 2006, and 61 in 2005). Using the 2006 rough population estimate as the total population (n= 340,000) of St. Charles County, the incidence rate for STDs during October 2007 is 13.8 cases/100,000 people. For comparison, the incidence rate (using the 2005 population estimate of 329,940) for 2006 was 18.5 cases per 100,000 and for 2005 was 18.4 cases per 100,000. The graph below shows the number of diagnoses for each STD during the month of October in 2004, 2005, 2006, and 2007.
The graph below shows number of diagnoses for each STD, but unlike the above graph, it displays year to date numbers and includes the months of January through October. From this graph we see that Chlamydia numbers have decreased slightly so far this year compared to the same time previous years.
The chart below compares monthly STD case totals from 2004-2007. This graph is intended to show the seasonality of STDs in St. Charles County. We can see that the number of STDS in St. Charles County is below what we saw in 2006 and slightly below the previous 3 year mean. The 3 graphs that follow display the same data broken down by diagnosis and from here we see that there has been a decrease in Gonorrhea cases, but Chlamydia cases and Syphilis cases has remained about the same.
Zip codes and STD Rates
The following chart shows the October 2007 rates and the previous 3 year mean rates of STD cases per zip code per 100,000 people. This was done using the 2000 population estimates for each zip code. The rates most likely are inflated due to the current 2007 population estimate for each zip code.
We can see from this table that the highest rate in October of this year was in the 63385 zip code (Wentzville area), but again this rate is most likely inflated. The previous 3 year mean had the highest rate in the 63367 zip code. If we look at the graph below the table we can clearly see that certain zip codes are seeing higher rates this October compared to previous October months.
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October 2007 |
October 2004–2006 |
| Zip Code |
Population |
Number of
STD Cases |
Oct 2007
Rate/100,000 |
Previous 3 Year
Mean |
Previous 3 Year
Mean
Rate/100,000 |
| 63301 |
46059 |
15 |
32.6 |
8.7 |
18.8 |
| 63303 |
41575 |
4 |
9.6 |
7.7 |
18.5 |
| 63304 |
38586 |
5 |
13.0 |
4.0 |
10.4 |
| 63366 |
57519 |
7 |
12.2 |
4.7 |
8.1 |
| 63367 |
8350 |
2 |
24.0 |
2.7 |
31.9 |
| 63376 |
68970 |
7 |
10.1 |
14.3 |
20.8 |
| 63385 |
13931 |
5 |
35.9 |
2.7 |
19.1 |
| unknown |
unknown |
2 |
unknown |
3.0 |
unknown |
Gender and STDs
As noted by the chart below, females outnumber males with lab-confirmed STDs. However, by looking at the 3 graphs below this graph we see that this gender discrepancy is really only seen among Chlamydia cases, it is not seen among Gonorrhea and Syphilis cases.
Age Groups and STDs
The highest numbers of STD cases have occurred within the young adult population 15-29 year olds. Steps to improve STD interventions and/or education may need to be addressed.
What is interesting about the graphs below, particularly the Gonorrhea graph, is that females outnumber males in the 15-19 age group, but conversely the males outnumber the females in the 30-39 and 40-49 age groups. Both these graphs show the that females are being diagnosed at a earlier age than males.
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