Discuss the differences in attack rates for the Texas and Arkansas counties, for rural versus urban children, and for preschool versus school-age children.

Measles- The Outbreak Case Study

Introduction:
This case study is based on an investigation by Philip Landrigan, EIS ’70. The investigation is described in: Landrigan PJ.

Epidemic measles in a divided city. JAMA 1972; 221: 567-570.

This case study was original developed by Philip Landrigan, Lyle Conrad and John Witte in 1971 find it to see the graph missing below. The current version was updated by Richard Dicker in 2001 and 2003.

Part III

Between June 1970 and January 1971, 633 cases of measles were reported from Texarkana. Dates of onset were accurately determined for 535 cases. The epidemic curve is shown below.

Though infants, adolescents, and adults were involved in the epidemic, the majority of cases occurred in children 1 to 9 years of age.

Measles cases were not evenly distributed within the two counties. Table 1 displays the number of measles cases and population by age group for Bowie County, Texas and in Miller County, Arkansas.

Table 1. Number of measles cases and population (1960 census) by age group and county, Texarkana outbreak, 1970 Residence Urban/Rural Age Group # Cases Population Rate Bowie Co, TX Rural 1-4 yr 47 2,452
5-9 178 3,242
1-9
Urban 1-4 195 2,481
5-9 73 3,010
1-9
Total 1-4 242 4,933
5-9 251 6.252
1-9
Miller Co, AK Total 1-4 19 2,671
5-9 6 3,345
1-9
Directions:
Measles is the theme of this Case Study. Answer the questions listed for part 3 (below) using APA citation and formatting in a 3-page paper after reading the material and using the resources provided. Use references as appropriate to answer the questions fully. Remember to cite all sources. Use professional references (not common websites),cite the reference where used in the narrative, and use correct reference formatting.

Answer the following questions with responses:
Question 6: Discuss the key features of the epidemic that you can derive from the epidemic curve (epi curve).
Describe in terms of person, time, and place, where possible.

Question 7: Calculate the totals and attack rates indicated in Table 1.

Question 8: Discuss the differences in attack rates for the Texas and Arkansas counties, for rural versus urban children, and for preschool versus school-age children

Discuss the differences in attack rates for the Texas and Arkansas counties, for rural versus urban children, and for preschool versus school-age children.

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