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Surveillance snapshot: Illness and injury burdens, reserve component, U.S. Armed Forces, 2020

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Exertional Hyponatremia, Active Component, U.S. Armed Forces, 2006–2021

Article
4/1/2022
Marine Corps Cpl. Luis Alicea drinks water after a combat conditioning exercise at Naval Air Station Joint Reserve Base New Orleans, May 20, 2019. Photo By: Marine Corps Lance Cpl. Jose Gonzalez.

Exertional (or exercise-associated) hyponatremia refers to a low serum, plasma, or blood sodium concentration (below 135 mEq/L) that develops during or up to 24 hours following prolonged physical activity. Acute hyponatremia creates an osmotic imbalance between fluids outside and inside of cells.

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Exertional Rhabdomyolysis, Active Component, U.S. Armed Forces, 2017–2021

Article
4/1/2022

Exertional rhabdomyolysis is a potentially serious condition that requires a vigilant and aggressive approach. Some service members who experience exertional rhabdomyolysis may be at risk for recurrences, which may limit their military effectiveness and potentially predispose them to serious injury.

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Exertional Heat Illness at Fort Benning, GA: Unique Insights from the Army Heat Center

Article
4/1/2022
Navy Petty Officer 3rd Class Ryan Adams is being used as an example victim for cooling a heat casualty at the bi-annual hot weather standard operating procedure training aboard Marine Corps Base Camp Lejeune, N.C., Aug. 24. Adams is demonstrating the "burrito" method used to cool a heat related injury victim. Photo by Pfc. Joshua Grant.

Exertional heat illness (hereafter referred to as heat illness) spans a spectrum from relatively mild conditions such as heat cramps and heat exhaustion, to more serious and potentially life-threatening conditions such as heat injury and exertional heat stroke (hereafter heat stroke).

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Heat Illness, Active Component, U.S. Armed Forces, 2021

Article
4/1/2022

From 2020 to 2021, the rate of incident heat stroke was relatively stable while the rate of heat exhaustion increased slightly

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Medical Surveillance Monthly Report

Obesity prevalence among active component service members prior to and during the COVID-19 pandemic, January 2018–July 2021

Article
3/1/2022
Maintaining a healthy weight is important for military members to stay fit to fight. The body mass index is a tool that can be used to determine if an individual is at an appropriate weight for their height. A person’s index is determined by their weight in kilograms divided by the square of height in meters. (U.S. Air Force photo illustration by Airman 1st Class Destinee Sweeney)

This study examined monthly prevalence of obesity and exercise in active component U.S. military members prior to and during the COVID-19 pandemic. These results suggest that the COVID-19 pandemic had a small effect on the trend of obesity in the active component U.S. military and that obesity prevalence continues to increase.

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Medical Surveillance Monthly Report

Brief report: Using syndromic surveillance to monitor MIS-C associated with COVID-19 in Military Health System beneficiaries

Article
3/1/2022
Air Force 1st Lt. Anthony Albina, a critical care nurse assigned to Joint Base Andrews, Md., checks a patient’s breathing and heart rate during an intubation procedure while supporting COVID-19 response operations in Cleveland, Jan. 20, 2022.

SARS CoV-2 and the illness it causes, COVID-19, have exacted a heavy toll on the global community. Most of the identified disease has been in the elderly and adults. The goal of this analysis was to ascertain if user-built ESSENCE queries applied to records of outpatient MHS health care encounters are capable of detecting MIS-C cases that have not been identified or reported by local public health departments.

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Surveillance Snapshot: Medical Separation from Service Among Incident Cases of Osteoarthritis and Spondylosis, Active Component, U.S. Armed Forces, 2016–2020

Article
3/1/2022
Marines hike to the next training location during Exercise Baccarat in Aveyron, Occitanie, France, Oct.16, 2021. Exercise Baccarat is a three-week joint exercise with Marines and the French Foreign Legion that challenges forces with physical and tactical training. Photo By: Marine Corps Lance Cpl. Jennifer Reyes

Osteoarthritis (OA) is the most common adult joint disease and predominantly involves the weight-bearing joints. This condition, including spondylosis (OA of the spine), results in significant disability and resource utilization and is a leading cause of medical separation from military service.

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Update: Malaria, U.S. Armed Forces, 2021

Article
3/1/2022
Mosquitos – like this one, collected as part of a military study in North Carolina – were used during USAMRDC’s initial RTS,S vaccine studies nearly 40 years ago. (Photo courtesy: AFC Kimberly Barrera)

Malaria infection remains an important health threat to U.S. service members who are located in endemic areas because of long-term duty assignments, participation in shorter-term contingency operations, or personal travel. In 2021, a total of 20 service members were diagnosed with or reported to have malaria.

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Brief Report: Refractive Surgery Trends at Tri-Service Refractive Surgery Centers and the Impact of the COVID-19 Pandemic, Fiscal Years 2000–2020

Article
3/1/2022
Cadet Saverio Macrina, U.S. Military Academy West Point, receives corneal cross-linking procedure at Fort Belvoir Community Hospital, Va., Nov. 21, 2016. (DoD photo by Reese Brown)

Since the official introduction of laser refractive surgery into clinical practice throughout the Military Health System (MHS) in fiscal year 2000, these techniques have been heavily implemented in the tri-service community to better equip and improve the readiness of the U.S. military force.

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Surveillance snapshot: Health care burden attributable to osteoarthritis and spondylosis, active component, U.S. Armed Forces, 2016–2020

Article
2/1/2022
Air Force security forces trainees climb a hill during a 3-mile ruck march to commemorate National Police Week at Joint Base San Antonio, May 13, 2019. Photo By: Sarayuth Pinthong, Air Force

This snapshot summarizes the total numbers of inpatient and outpatient encounters with an OA or spondylosis diagnosis in the first diagnostic position and the total numbers of unique individuals affected by these conditions during the same 5-year surveillance period.

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A new approach to categorization of ocular injury among U.S. Armed Forces

Article
2/1/2022
Air Force and Space Force Surgeon General Lt. Gen. Dorothy Hogg receives an eye exam from Air Force Reserve Maj. Leslie Wilderson at Joint Base Anacostia-Bolling, Washington, D.C., March 26, 2021. Photo By: Air Force Staff Sgt. Kayla White

Ocular injuries present an ongoing threat to readiness and retention of service members. This report describes a new approach to categorizing ocular injury using Military Health System data, the application of an algorithm to a dataset, and the verification of the results using an audit of clinical data.

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Diagnosis of hepatitis C infection and cascade of care in the active component, U.S. Armed Forces, 2020

Article
2/1/2022
Navy Petty Officer 2nd Class Cecil Dorse, left, and Navy Petty Officer 3rd Class Janet Rosas test blood samples aboard the Military Sealift Command hospital ship USNS Comfort while the ship is in New York City in support of the nation’s COVID-19 response, April 6, 2020. Photo By: Navy Petty Officer 2nd Class Sara Eshleman

Hepatitis C virus (HCV) infection rates are rising in the U.S. despite widely available tools to identify and effectively treat nearly all of these cases. This cross-sectional study aimed to use laboratory data to evaluate the prevalence of HCV diagnoses among active component U.S. military service members.

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Surveillance Snapshot: Lengths of Hospital Stays for Service Members Diagnosed with Sepsis, Active Component, U.S. Armed Forces, 2011–2020

Article
1/1/2022
The (left to right) Senior Airman Austin Shrewsbury, 88th Diagnostics and Therapeutic Squadron medical laboratory technician, works with student, Airman 1st Class Taylor Altman, 88th Diagnostics and Therapeutic Squadron medical laboratory technician, to identify bacteria of patient’s cultures inside the microbiology laboratory at Wright-Patterson Air Force Base medical center June 30, 2017.

Sepsis is a serious and life-threatening organ dysfunction caused by a dysregulated host response to infection. In the U.S., sepsis is a leading cause of in-hospital mortality and 1 of the most expensive conditions treated in U.S. hospitals.

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Description of a COVID-19 Beta Variant Outbreak, Joint Base Lewis-McChord, WA, February–March 2021

Article
1/1/2022
U.S. Army Soldiers from 1-17th Infantry Battalion, 2nd Stryker Brigade, 2nd Infantry Division, clear an objective during the training exercise Bayonet Focus 19-02 at Yakima Training Center, Wash., May 6, 2019. Bayonet Focus is a training exercise designed to assess Soldiers’ ability to preform tasks and complete objectives under conditions experienced during combat situations. (U.S. Army photo by Spc. Angel Ruszkiewicz)

This report describes an outbreak of SARS-CoV-2, the causative agent of COVID-19, that peaked during 21–26 February 2021 and was tied to a single military training event. A total of 143 laboratory-confirmed cases were identified.

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COVID-19 and Depressive Symptoms Among Active Component U.S. Service Members, January 2019–July 2021

Article
1/1/2022
With the holiday season upon us, the cold, dark days that winter brings, and the social distancing and movement restrictions brought about by COVID-19, it’s not uncommon for people to feel depressed. (Photo by Erin Bolling)

This study examined the rates of depressive symptoms in active component U.S. service members prior to and during the COVID-19 pandemic and evaluated whether SARS-CoV-2 test results (positive or negative) were associated with self-reported depressive symptoms.

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Last Updated: August 18, 2021

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