Archive for August, 2012

Cockroaches in School = More Allergens

Saturday, August 18th, 2012

Did you know cockroaches raise the allergen load in the air? This isn’t good for air quality, but it’s especially problematic for children with asthma.

As the nation’s youth heads back to school this month and next, it’s important that administrators, teachers and parents are aware of the reasons why proper integrated pest management (IPM) in schools should be a priority. Read the post below on asthma management and how it’s related to pest control, courtesy of the Texas A&M School of IPM:

Asthma is a growing health problem, especially among school-aged children.  Asthma prevalence has increased from 7.3% of the population in 2001 to 8.4% in 2010 (CDC NCHS Data Brief no 94 May 2012).  In its 2011 Asthma & Children Fact Sheet, the American Lung Association reported that 7.1 million children under 18 had asthma.  The Association also reports that the annual direct health care cost of asthma is approximately $50.1 billion (Asthma in Adults Fact Sheet).  In 2008, there were more than 14.8 million asthma-related school absences (Meng et al. 2012).

A life-long disease once acquired, asthma causes wheezing, shortness of breath, chest tightening and coughing.  Susan Hoffmann, the Delaware director of the National Association of School Nurses and lead school nurse for the Caesar Rodney School District in Camden, Delaware, compares asthma episodes to the embers of a fire—“sometimes it’s just smoldering in the background but then you have flare-ups.”  Asthma symptoms are caused by three issues: inflamed airways, increased mucus production and tightening , called bronchoconstriction, of the smooth muscles that surround the airways.

According to Hoffmann, schools should “develop a multi-disciplinary team of administrators, teachers, parents, custodial staff and coaches to create asthma management policies and look at ways to reduce triggers throughout the school.”  Hoffmann recommends the following actions to deal with asthma at school.

  1. Establish strong links with asthma-care clinicians to ensure appropriate and ongoing medical care.  Medical providers should develop an asthma action plan.  Plans should include actions for tiered symptom levels, such as green (no symptoms), yellow (moderate symptoms) and red (asthma crisis).  The school nurse should keep plans for each student on file and share them with teachers, physical education coaches and other staff.
  2. Use a coordinated, multi-component and collaborative approach that includes school nursing services, asthma education for students and professional development for school staff.
  3. Ensure that students have access to all medications.  Consult state laws to determine if children are allowed to carry their own quick relief medications.

Well-controlled asthma should not limit a child’s ability to participate in school activities.  However, uncontrolled asthma is the leading reason for school absences.  “Asthma symptoms can lead to a disruption in sleep because the child cannot rest due to coughing, which can result in decreased school performance, learning difficulties, restlessness or fatigue,” comments Hoffmann.  Additionally, the side effects of some asthma medications include irritability and sleeplessness.

IPM in schools and homes go hand-in-hand with asthma management.  Common triggers for asthma include mold, pet dander, and cockroach and pest allergens.  Sealing leaky pipes, promptly cleaning up spills, and sealing cracks and crevices can greatly reduce these triggers by denying pests water, food and shelter.  Reducing moisture is critical to eliminating mold.

According to the US EPA’s Asthma Triggers: Gain Control, “Droppings or body parts of cockroaches and other pests can trigger asthma.  Certain proteins are found in cockroach feces and saliva and can cause allergic reactions or trigger asthma symptoms in some individuals.”  Some IPM tips for reducing cockroach allergens include:

  • Keep counters, sinks, tables and floors clean and clutter-free. Cluttered areas provide harborage for cockroaches and are difficult to clean.  (More information about cockroach habits can be found in our December 2011 newsletter.)
  • Clean up any crumbs and spills right away. These are a great source of food and water for roaches.
  • Store any food or food products (like pasta or rice used for art projects) in airtight containers, such as Tupperware® containers or Ziplock® bags.
  • Seal cracks or openings around or inside cabinets.

Resources

The US EPA Indoor Air Quality (IAQ) Tools for Schools program has a number of free resources to help schools implement IAQ programs, including a set of lesson plans to teach children about asthma.  To manage IAQ in schools, EPA recommends six technical solutions, including providing quality HVAC systems, controlling moisture and mold, practicing IPM and using proper cleaning and maintenance techniques.  The American Lung Association’s Asthma-Friendly Schools Initiative also includes information and tools for school asthma management.  The National School IPM Working Group created a document, Reducing your Child’s Asthma using Integrated Pest Management: A Practical Home Guide for Parents, to educate schools and parents about the cost benefits and asthma reduction that can be achieved through IPM implementation.

Educators and others can gain access to best practices, tools and resources with AsthmaCommunityNetwork.org, a national network designed for community-based asthma programs.  EPA’s School IAQ Connector email discussion list is also available for members to ask questions about asthma management.  Join by sending a blank email message to schools_iaq_connector-subscribe@lists.epa.gov.

Spotlight: Western Subterranean Termite

Friday, August 3rd, 2012

(Reticulitermes hesperus)


Written by: Robin L. Tabuchi, Research Entomologist, University of California, Berkeley.

Imagine you are buying a house and it’s time for the pest management professional (PMP) to conduct an inspection. When you get the report, you are disappointed to learn the house has subterranean termites. You are now reconsidering the purchase and anxiously searching the web for information on termites. The scenario is much more common than you might think. For example, it’s estimated that 1 in 5 homes in California have been or will be munched on by subterranean termites.

Subterranean termites live underground and build tunnels to access above-ground wood. They are social insects and live in colonies with a queen and king, workers and soldiers. Each member of the colony has its own job to ensure survival. Mature colonies can range from 5,000 to 500,000 individuals.

Fun Fact: In order to create new colonies, winged termites fly on warm, sunny days following rain in late spring and fall. They pair as kings and queens, shed their wings and burrow into the soil. A queen can live many years, but once she dies, it doesn’t necessarily mean the colony dies. There are additional members of the colony that begin to lay eggs.

How do you treat a house for subterranean termites? When treating for subterranean termites, it’s imperative to treat the whole colony — not just those that are foraging on the wood in the house. Treating infestations usually requires an integrated pest management approach; using methods such as habitat modification, physical and chemical barriers, and baiting. Each particular house will have a different treatment plan. Treatment options depend on variables such as the type of foundation, soil content, where the infestation is located in the structure, and personal preference. Talk to a pest management professional about the different treatment options and costs best suited for your situation.

How soon do I need to treat? A Western subterranean termite colony eats less than an ounce of wood per day. In comparison, Formosan subterranean termite colonies (found in Southern states) can consume a pound of wood per day. This would represent an 8-foot-long 2×4 every two weeks. So, depending on how bad the infestation is and if there is structural damage or not, you may have time. Consider your treatment options and get multiple quotes. Many times you can negotiate treatment costs to be paid by the seller.

Armed with information you are now ready to make a decision about the house. Western subterranean termites are common, but finding the perfect house is rare. Even if you find a house that is free from termites, remember this: Individual subterranean termites can travel many feet per day. A single colony can forage from a distance of several feet to more than 100 feet. So, as long as we build our houses out of wood, you will likely encounter subterranean termites. Fortunately, controlling them with an integrated pest management (IPM) approach will greatly decrease your likelihood of experiencing severe subterranean termite damage.

Photo courtesy of Robin Tabuchi

Western subterranean termites. Photo courtesy of Robin Tabuchi

Trivia Thursday: How much do you REALLY know about fire ants?

Thursday, August 2nd, 2012

Many people know that if you step on a fire ant mound, you’re probably going to get bitten. Do you know what to do if they attack you or your child? How much do you REALLY know about fire ants?!

It only takes fire ants 10 seconds to swarm when they’ve been disturbed. True or False?

True. Most fire ants only attack people or animals when their mounds are disturbed or they feel threatened. However, once bothered, it only takes 10 seconds for a swarm of angry fire ants to attack. The swarm tends to climb very quickly in a vertical direction — such as up your legs (yikes!) if you walk into their mound. Fire ant bites inflict a burning sensation and cause the development of small bumps on the skin that turn red and fill with white fluid a few days later.

Keep your wilderness wits about you and watch your step to avoid their mounds. If you’re ever attacked, quickly brush the ants off your skin and move away from the area. A few methods will help reduce the severity of ant bites:

  • Wash the area with soap and water
  • Apply ice
  • Take an antihistamine
  • Apply a paste of baking soda and water to help swelling and itching
  • Avoid scratching the area

While most people do not experience symptoms beyond those mentioned above, children or people allergic to fire ants might suffer more. Seek emergency medical help immediately if you or someone else experiences:

  • Chest pain
  • Severe sweating
  • Loss of breath
  • Serious swelling
  • Slurred speech

Fire ants only live in dirt mounds outside. True or False?

False. While fire ants tend to nest outdoors in mounds built of dirt, other environmental factors, such as heavy rainfall and flooding, can cause them to seek new dwelling places — such as your home or office. In search of dry areas and access to food sources, these unwelcomed guests have been known to invade and colonize in the walls of buildings, pipes, plumbing units, under sidewalks and even automobiles, among other places. Indoor infestation can quickly cause damage to light and other electrical fixtures, air conditioners and building structures.

Fortunately, there are several control methods for fire ants. Some options include fumigation, baits, mechanical removal as well as other methods. Contact a local pest control professional to help identify the severity of the problem plus the best way to monitor and prevent future infestations.

In less than 10 seconds, an unwary scientist was stung more than 250 times on one leg when he carelessly knelt on a collapsed fire ant mound. The sterile pustules developed to this stage in three days. Image and cutline courtesy of USDA National Agricultural Library Image Galleries. Photo by Daniel Wojcik.

In less than 10 seconds, an unwary scientist was stung more than 250 times on one leg when he carelessly knelt on a collapsed fire ant mound. The sterile pustules developed to this stage in three days. Image and cutline courtesy of USDA National Agricultural Library Image Galleries. Photo by Daniel Wojcik.