We're unable to sign you in at this time. Please try again in a few minutes.
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......

Ecological Monitoring Helps Researchers Study Disease in Environmental Context

Joan Stephenson, PhD
JAMA. 1997;278(3):189-191. doi:10.1001/jama.1997.03550030029011.
Text Size: A A A
Published online


WHEN a previously unknown and deadly respiratory illness appeared in 1993 in the American Southwest, the outbreak sent researchers scrambling to learn the cause of the infection—a previously unknown Hantavirus—and to discover just why the new disease surfaced so dramatically at that time and place.

Thanks to the availability of records of local climate conditions as well as data for the population levels of deer mice found to be the vector for the infection, scientists constructed a plausible scenario that most felt was the likely explanation for the disease's emergence.

Six years of drought, followed by extremely heavy rains in the spring of 1993—rains thought to be related to the El Niño pattern of warming in parts of the Pacific Ocean—had caused a bumper crop of piñon nuts and a 10-fold surge in the numbers of well-fed deer mice. Case-control studies revealed that contact with rodent feces through agricultural


Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?




Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.


Some tools below are only available to our subscribers or users with an online account.

0 Citations

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

Customize your page view by dragging & repositioning the boxes below.