Nursing Care Plan | NCP Hantavirus Infection

Hantavirus infection is more commonly called hantavirus pulmonary syndrome or HPS in the United States. It is a rare but potentially fatal disease that people get by breathing in the virus from the dried urine, feces, or saliva of its vectors —infected mice or rats. Hantavirus infection is classified as both an emerging infectious disease and a zoonosis (disease transmitted from animals to humans).

The most distinctive symptom of hantavirus infection is its effect on the patient’s lungs and breathing. After an incubation period of several days to several weeks, the infected person develops symptoms that can easily be mistaken for the flu or food poisoning. In the second phase, however, the patient has trouble breathing and may die as the lungs fill up with fluid and other body organs begin failing.

Anyone can get hantavirus infection from infected mice. However, most reported cases are in middle-aged adults. People of both sexes and all races can get the infection. Men are at somewhat greater risk than women, however, because they are more likely to be employed in occupations that expose them to infected mice. Hantavirus infection had been reported in thirty states in the United States as of 2008. It is most likely to occur in the spring and summer as the weather warms and people spend more time outdoors. It can also occur in the fall, when the rodents that carry the virus seek shelter from the cold weather in houses or barns.

Some people are at greater risk of hantavirus infection:
• People who live in New Mexico, Colorado, Arizona, California, Utah, Texas, Washington, Idaho, and Montana.
• Farmers, ranchers, and field hands
• Field biologists and veterinarians
• People who work in grain elevators, feed lots, or feed mills
• Utility workers, plumbers, and electricians
• Construction workers and building contractors
• Hikers and campers

Nursing Care Plan and Symptoms
Hantaviruses are RNA viruses that enter the body when people breathe dust contaminated by the urine, feces, or saliva of rodents. They sometimes breathe in this contaminated dust while working in a mouse-infested building, cleaning out a barn or shed, or hiking or camping in an area where infected mice build their burrows. When a person breathes in the dust, the virus particles enter the tissues lining the nose, throat, and lungs. People can also take in the virus if they touch an object that has been contaminated by rodent droppings and then touch their mouth or nose. It may take anywhere from one week to five weeks for the disease to incubate. In a very few cases, people have been infected with hantavirus after being bitten by an infected mouse, but this method of transmission is unusual. As far as is known, people cannot get hantavirus infection through direct contact with an infected person.

The early stage of the disease is often misdiagnosed as flu or food poisoning because the person may have muscle ache and pains like those of flu or have nausea, vomiting, and diarrhea resembling the signs of food poisoning. This stage of the illness lasts from a few hours to several days.

Other early symptoms of hantavirus infection are:
• Fever between 101 and 104°F (38 and 40°C)
• Chills
• A dry cough
• Rattling noises in the lungs
• Fatigue

In the second stage of the disease, the body responds to the virus that is infecting the tissue lining the lungs by secreting large amounts of fluid in order to get rid of the virus. The fluid, however, makes it hard for the person to breathe. Eventually the patient’s blood pressure drops, an abnormal heart rhythm may develop, and one’s breathing and blood circulation fails.

Nursing Care Plan Diagnosis
The diagnosis of hantavirus infection is based on the patients’ history, including their occupational history or other evidence that they were exposed to mice and rats or their droppings. Hantavirus infection can be distinguished from influenza, bubonic plague, and other conditions that may cause painful breathing through a blood test. In most cases the doctor will also order a chest x ray to look for fluid buildup in the lungs.

Nursing Care Plan Treatment
There is no drug that can cure hantavirus infection. The patient’s best chance of recovery is being placed on a respirator to help him or her breathe. Another form of treatment that helps some patients is extracorporeal membrane oxygenation, or ECMO. It is a technique in which the patient’s blood is pumped through a machine that removes carbon dioxide and adds oxygen to the blood. The oxygenated blood is then returned to the patient’s body.

Nursing Care Plan Prognosis
In the early 1990s hantavirus infection was almost always fatal. Better understanding of the disease, however, has reduced the death rate to about 50 percent. Patients who survive, however, recover completely without long-term damage to their lungs.

Nursing Care Plan Prevention
There is no vaccine to prevent hantavirus infection. The risk of hantavirus infection can be lowered considerably, however, by taking proper precautions to keep buildings free of rodents and to minimize exposure to them outdoors. The CDC recommends the following steps:
• Seal up holes, cracks, and other gaps that might allow mice to get into a house or barn.
• Get rid of any food sources (pet food, garbage cans, animal feed) within 100 feet (30 meters) of the house.
• Cut grass short near the house and keep shrubbery trimmed.
• Use mousetraps inside the house; disinfect dead rodents before disposing of them.
• Treat rodent droppings with chlorine bleach or another disinfectant before sweeping or vacuuming them. Wear rubber gloves during cleaning.
• Wear a respirator when cleaning, repairing, or working in a rodent-infested building.

The Future
It is difficult to predict whether hantavirus infection will become more common in the United States and Canada over the next few decades. On the one hand, hantaviruses may spread to parts of North America where the infection has not yet been reported. On the other hand, doctors are now better trained to recognize the disease early and hospitalize patients quickly. It is also possible that an effective vaccine will be developed at some future point.