Symptoms of lung parasites vary but commonly include cough (sometimes with blood), chest pain, shortness of breath, wheezing, fever, chills, fatigue, and wheezing, often mimicking asthma or pneumonia, with some severe cases leading to respiratory failure or neurological issues, depending on the specific parasite like flukes, roundworms, or Toxocara.
Most infected people do not have symptoms, but those who do may have diarrhea, abdominal pain, fever, cough, itching, and later, symptoms due to damage to the lungs and other organs. Doctors diagnose the infection when they see eggs in a person's sputum or eggs from swallowed sputum in stool.
This can feel like cramping or general discomfort and often doesn't go away with typical remedies. Along with this, you may notice digestive issues such as diarrhea, constipation, bloating, gas, or even bouts of nausea and vomiting. These symptoms can make your child feel unsettled and affect their daily activities.
Others may have only mild, short-lived symptoms. Very rarely, rat lung worm causes an infection (infestation) of the brain called eosinophilic meningo-encephalitis. People with this condition may have headaches, a stiff neck, tingling or pain in the skin, fever, nausea, and vomiting.
Paragonimus is a parasitic lung fluke that infects a person's lungs and causes paragonimiasis. You can get paragonimiasis by eating raw or undercooked crabs or crayfish. Initial symptoms include diarrhea and abdominal pain, followed by fever, chest pain, and fatigue. Treatment is available through prescription drugs.
The symptoms of bacterial pneumonia can develop gradually or suddenly. Fever may rise as high as a dangerous 105 degrees F, with sweating, chills, rapid breathing and pulse rate. Lips and nailbeds may have a bluish color due to lack of oxygen in the blood.
10 Warning Signs of Parasitic Infections
How is lungworm diagnosed? No test is totally reliable, but most vets will use a blood test. Your vet will also ask you about any symptoms your dog might have.
Here are the eight most common signs of parasitic infection:
In the lungs
The larvae travel into the lungs through the bloodstream or part of the immune system called the lymphatic system. At this stage, you may have no symptoms, or symptoms may be like those of asthma or pneumonia. These symptoms include: Dry cough that may bring up blood.
(The infection caused by cysts is called cysticercosis or, when the cysts form in the brain, neurocysticercosis.) These cysts cause few symptoms until the cysts degenerate and the larvae die, triggering inflammation, swelling, and symptoms such as headaches, seizures, personality changes, and mental impairment.
Parasitic Infections in Children
Infants, toddlers, and very young children in day care settings are at risk for the parasitic disease called giardiasis that causes diarrhea and is spread through contaminated feces. Pinworm infection (enterobiasis) also occurs among preschool and young school-age children.
Parasites are an uncommon cause of pneumonia, usually affecting immunocompromised individuals or those in underdeveloped countries. In developed countries, it is most common to see parasitic pneumonia in immigrants or recently returning travelers.
Symptoms of Fluke Lung Infections
Most people with fluke lung infections do not develop symptoms. However, soon after getting a lung fluke infection, people may have diarrhea, abdominal pain, fever, cough, and itching. Later, the infection damages the lungs the most but may affect other organs, including the skin.
During the analysis of the lung X-ray was observed that in the group of patients with infections of the lower respiratory tract most common disease is the pneumonia with 74%, followed by acute and chronic bronchitis with 3% and 2% with COPD.
Knowing if you have parasites involves recognizing symptoms like digestive issues (diarrhea, bloating, pain), unexplained weight loss, fatigue, skin rashes, or muscle aches, but often infections are subtle or asymptomatic, so a doctor's diagnosis through stool samples or blood tests is crucial for confirmation, especially if you have persistent symptoms like fever, extreme fatigue, or blood in your stool.
Most people infected with Strongyloides do not have any symptoms. And of those who do, many of them have non-specific or generalized complaints. A rash may occur immediately after infection at the site where the parasite entered the body. Coughing usually occurs several days later.
Other examples of parasitic infections include:
Patients usually are asymptomatic but with heavy infections can have anorexia, bloating, cramps, and diarrhea. Diagnosis is by finding eggs in the stool or serendipitously by seeing the adult tapeworms on endoscopy.
Signs of lungworm infection range from moderate, dry coughing with slightly increased respiratory rates to severe, persistent coughing and respiratory distress or even failure. Infections with no visible signs can also occur. Death is relatively uncommon in dogs infected with these lungworms.
The parasites can be killed with specific antiparasitic drugs, depending on the type of lungworm. Different medications include ivermectin, fenbendazole (Panacur™), moxidectin + imidacloprid (Advantage Multi®), milbemycin + afoxolaner (Nexgard Spectra®), and milbemycin oxime + praziquantel (Interceptor Plus™).
The main clinical signs of lungworm infection are dyspnoea (laboured breathing), coughing, nasal discharge and loss of weight. Coughing sounds like a dry, non-productive exhalation ('husk').
Common parasite symptoms may include:
Some parasites are visually comparable to undigested foods that can appear in the stool, namely germinated bean sprouts; physicians should not only be mindful of such similarities, but should also take a full dietary history and consider any such correlations before requesting microbiologic analysis.
Transmission routes vary depending on the parasite. But most people get intestinal parasites by ingesting eggs that get passed along through poop. The eggs are microscopic, so there's no way to know you're swallowing them.