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The life cycle of Trypanosoma cruzi involves two intermediate hosts: the invertebrate vector (triatomine insects) and the vertebrate host (humans) and has three developmental stages namely, trypomastigotes, amastigotes and epimastigotes .
During infection of a mammalian host, African trypanosomes are in constant contact with the host’s immune system. These protozoan parasites are infamous for their ability to evade the immune responses by periodically switching their major variant surface glycoprotein (VSG), a phenomenon called antigenic variation.
There is no vaccine or drug for prophylaxis against African trypanosomiasis. Preventive measures are aimed at minimizing contact with tsetse flies. Local residents in endemic countries are usually aware of the areas that are heavily infested and may be able to provide advice about places to avoid.
There is no test of cure for African trypanosomiasis. After treatment, patients should be closely followed for 24 months and monitored for relapse. Recurrence of symptoms will require examination of body fluids, including CSF, to detect the presence of trypanosomes.
A bite by the tsetse fly is often painful and can develop into a red sore, also called a chancre. Fever, severe headaches, irritability, extreme fatigue, swollen lymph nodes, and aching muscles and joints are common symptoms of sleeping sickness. Some people develop a skin rash.
No vaccine or medicine can prevent African sleeping sickness. But you can avoid being bitten by tsetse flies. Experts recommend the following: Wear protective clothing, such as long-sleeved shirts and pants.
Definitive diagnosis rests on the observation of trypanosomes by microscopy.
Complications of African trypanosomiasis may include the following:
Treatment. To treat deer fly bites, clean the affected area with soap and water. You can apply ice to the area to treat pain. You can also take allergy medicine like diphenhydramine (Benadryl) to reduce itching, which can prevent secondary infection.
Romana’s sign, also known as a chagoma, is a medical term for the unilateral painless periorbital swelling associated with the acute stage of Chagas’ disease.
THE KISSING BUG IN QUEZON CITY,PHILIPPINES. The insects of the subfamily Triatominae (Hemiptera, Reduviidae) are vectors of Trypanosoma cruzi, agent of Chagas disease, endemic in Latin America, but not recorded in the rest of the world.
Intense local inflammation and/or 2 months of uniocular conjunctivitis, known as Chagoma/Romana’s sign. Acute phase lasts for approximately 2 months following infection. May present with fever, edema, lymphadenopathy, anemia, hepatosplenomegaly, ECG abnormalities, central nervous system (CNS) involvement, and death.
Some people are allergic to kissing bug saliva. The skin near the bite might become red, swollen, and itchy. The most serious risk is anaphylactic shock. That’s when your blood pressure drops and you have trouble breathing.
It has not been recorded in Canada. Three types of ‘kissing bugs’, all of which can be found in the U.S. Experts say the risk of contracting Chagas, which can be transmitted by kissing bugs, in Canada is low. Canadains who become infected with Chagas normally do so when travelling outside of the country.
If you do come across a triatomine, don’t kill it, the CDC recommends. Instead, capture it with a container and either fill it with rubbing alcohol or freeze it. Then take it to your local health department or university laboratory for identification.
They have long mouthparts and feed on mammals and humans. Kissing Bugs are found in the garden, inside your home, or close to any animal quarters (dog houses, poultry houses, livestock quarters). Kissing Bugs are mainly nocturnal and outdoor lights attracts them.
Kissing bugs are found in warm southern states of the U.S. and in Mexico, Central America, and South America. Kissing bugs can hide in cracks and holes in beds, floors, walls, and furniture. They are most likely to be found: Near places where a pet, such as a dog or cat, spends time.
If you find a kissing bug, the CDC recommends you do not touch or squash it. To help understand the problem and how many carry the disease, the CDC is asking for help. They suggest you place a container on top of the kissing bug for 24 hours, and then seal the bug inside the container.
Size-wise, kissing bugs are also bigger than most stink bugs. Stink bugs tend to be about half an inch long, while kissing bugs sometimes reach an inch in length (just bigger than a penny). Then, of course, there’s the biggest difference: stink bugs won’t bite you, while kissing bugs do.
Seasonal cues trigger stink bugs’ search for winter quarters; the shortening days and falling temperatures sending them scuttling for cover. If they sheltered beneath tree bark or mulch, it would be one thing. But they prefer sharing your home over winter, piling into cracks and crevices by the thousands.
Stink bugs are attracted to lights, so it’s recommended to keep outdoor lighting to a minimum. During the evenings, turn off porch lights and pull down window blinds to prevent light from spilling outside.
The good news is that stink bugs don’t bite. They also don’t harm people or pets, nor do they spread disease. However, some people are allergic to the compounds released by the stink bug. Symptoms of this allergy can include a runny nose and, if you come in contact with crushed bugs, dermatitis.
There is a common myth that when you kill a stink bug and the unique odor is released, the stench will attract more stink bugs. This is not true. The leftover odor from a dead stink bug will not attract more to your home.