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MMWR Surveillance Summaries
Vol. 64, No. SS-3
May 1, 2015 |
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| In this report |
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Cryptosporidiosis Surveillance — United States, 2011–2012
Painter JE, Hlavsa MC, Collier SA, et al.
MMWR Surveill Summ 2015;64(No. SS-3)
Cryptosporidiosis is a nationally notifiable gastrointestinal illness caused by the extremely chlorine-tolerant protozoa of the genus Cryptosporidium. Fifty state and two metropolitan public health agencies voluntarily report cases of cryptosporidiosis through CDC's National Notifiable Diseases Surveillance System. For 2011, a total of 9,313 cryptosporidiosis cases (confirmed and nonconfirmed) were reported; for 2012, a total of 8,008 cases were reported; 5.8% and 5.3%, respectively, were associated with a detected outbreak. Cryptosporidiosis incidence rates remain elevated nationally, and rates of nonconfirmed cases have increased. Rates remain highest in young children, although rates among elderly adults are increasing. Future research is needed to address shifting trends in cryptosporidiosis cases, with a specific focus on the increase in nonconfirmed cases and increasing incidence rates among elderly adults. |
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Giardiasis Surveillance — United States, 2011–2012
Painter JE, Gargano JW, Collier SA, et al.
MMWR Surveill Summ 2015;64(No. SS-3)
Giardiasis is a nationally notifiable gastrointestinal illness caused by the protozoan parasite Giardia intestinalis. Forty-four states, the District of Columbia, New York City, the Commonwealth of Puerto Rico, and Guam voluntarily reported cases of giardiasis to CDC through the National Notifiable Diseases Surveillance System (NNDSS). For 2011, a total of 16,868 giardiasis cases (98.8% confirmed and 1.2% nonconfirmed) were reported; for 2012, a total of 15,223 cases (98.8% confirmed and 1.3% nonconfirmed) were reported. In 2011 and 2012, 1.5% and 1.3% of cases, respectively, were associated with a detected outbreak. For the first time in 10 years, giardiasis rates appear to be decreasing. Educational efforts to decrease exposure to unsafe drinking and recreational water and prevent person-to-person transmission have the potential to reduce giardiasis transmission. |
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Centers for Disease Control and Prevention |
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