Aelurostrongylosis, Aelurostrongylus Abstrusus Infection (Parasitic Lung Infections Caused by Lungworms) in cats
- Occurrence: common
- Location of illness: Chest
When to visit the vet?
Non-urgent see a veterinarian within 2–3 days
If the condition worsens / symptoms persist, consult a veterinarian.
Definition
Aelurostrongylosis, caused by the parasiteA parasite is an organism that lives on or in another living being (the host) and feeds at its expense. Parasites can cause a variety of diseases in animals and humans. Aelurostrongylus abstrusus, is a parasiticParasitic refers to diseases or conditions caused by parasites. Parasitic infections can affect the digestive tract, skin, and other organ systems. infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. of the lungs in cats, often leading to respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. distress.
The most important facts at a glance
Aelurostrongylosis is a parasiticParasitic refers to diseases or conditions caused by parasites. Parasitic infections can affect the digestive tract, skin, and other organ systems. lung infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. in cats caused by the nematode worm Aelurostrongylus abstrusus. The worms live in the bronchi of the lungs and lay eggs from which larvae hatch. These are coughed up, swallowed, and excreted in the feces. Snails and slugs act as intermediate hosts by ingesting the larvae. Cats become infected by eating these hosts or paratenic hosts such as birds or rodents. Common symptoms include sneezing, nasalNasal refers to the nose and nasal cavities. In veterinary medicine, this can involve examinations, treatments, or diseases affecting the nose of dogs and cats. discharge, and respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. distress. DiagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is made through fecal examination using the Baermann method, X-rays, or bronchoscopyBronchoscopy is a diagnostic and therapeutic procedure in which the inside of the airways is directly viewed with a bronchoscope, a thin, flexible viewing tube. It can be used to take tissue samples or remove foreign objects.. Serological tests can support the diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients.. Treatment includes antiparasiticsAntiparasitics are medications or substances used to treat parasitic infestations, such as worms, protozoa, and ectoparasites. They work by killing the parasites or inhibiting their growth. such as ivermectin and fenbendazole, as well as potentially anti-inflammatory drugsAnti-inflammatory drugs are medications that reduce inflammation. They can be divided into nonsteroidal anti-inflammatory drugs (NSAIDs) and corticosteroids and are used in dogs and cats to reduce Inflammatory conditions and Pain. or antibiotics. The prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. is good with early treatment. PreventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. involves minimizing contact with snails and regular deworming. Research focuses on the parasite’s biology, diagnostic methods, and new treatment options. Modern techniques such as serological tests and molecular approaches improve early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients.. The development of vaccines shows promising approaches. Overall, a better understanding of the parasiteA parasite is an organism that lives on or in another living being (the host) and feeds at its expense. Parasites can cause a variety of diseases in animals and humans. significantly improves the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. for affected cats. Good health monitoring is crucial for detecting infections early and ensuring effective treatment.
Causes
Aelurostrongylus abstrusus is a nematode worm that lives in the bronchi and bronchioles of a cat’s lungs. These parasites undergo a complex life cycle that includes both intermediate and definitive hostsDefinitive hosts are the organisms in which a parasite or pathogen completes its reproductive cycle. Unlike intermediate hosts, which only harbor certain developmental stages of the parasite, definitive hosts are necessary for the parasite's reproduction.. The adultThe term "adult" refers to an individual who has reached full physical development and is considered an adult. In veterinary medicine, this term is used to describe animals that have completed growth and are of reproductive age. worms deposit eggs in the lungs of the infected cat, from which larvae hatch. These larvae are eventually coughed up and swallowed before being excreted in the feces.
Intermediate hosts, particularly snails and slugs, ingest the excreted larvae. These larvae develop further in the intermediate hosts, and cats become infected by eating these hosts directly or by consuming paratenic hosts such as birds, rodents, or frogs that have eaten infected snails.
The infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. is widespread globally but occurs more frequently in regions with a damp climate, as such conditions favor the reproduction of snails and slugs. Cats that spend a lot of time outdoors or hunt are at a higher risk of infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease..
Symptoms
Symptoms of aelurostrongylosis can vary depending on the severity of the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease.. In mild infections, cats may show no obvious symptoms. In more severe infections, however, chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. cough, respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. distress, nasalNasal refers to the nose and nasal cavities. In veterinary medicine, this can involve examinations, treatments, or diseases affecting the nose of dogs and cats. discharge, and sneezing may occur.
In some cases, an increased respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. rate, panting, or even pneumonia can occur. Cats with severe aelurostrongylosis may appear lethargic, suffer from a loss of appetite, and potentially experience weight loss. In rare cases, hypersensitivity to physical exertion may occur, manifesting as rapid fatigue or collapse.
Diagnosis
The diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. of aelurostrongylosis is based on a combination of clinical signs and specialized diagnostic tests. An important step is examining the cat’s feces for the parasite’s larvae. The Baermann method, a special procedure for isolating larvae from feces, is frequently used to detect the presence of Aelurostrongylus abstrusus.
Additionally, a chest X-rayX-ray is an imaging technique that uses X-rays to create images of the inside of the body. It is often used to diagnose bone fractures, lung diseases, and other conditions. may be performed to identify signs of inflammation or other changes in the lung tissue that could indicate an infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease.. In some cases, a bronchoscopyBronchoscopy is a diagnostic and therapeutic procedure in which the inside of the airways is directly viewed with a bronchoscope, a thin, flexible viewing tube. It can be used to take tissue samples or remove foreign objects. or tracheal wash may be performed to take samples directly from the airways and check for larvae.
Serological tests that detect specific antibodies against the parasiteA parasite is an organism that lives on or in another living being (the host) and feeds at its expense. Parasites can cause a variety of diseases in animals and humans. can also be helpful in supporting the diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients.. The combination of these tests helps to rule out other respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. diseases with similar symptoms and establish an accurate diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients..
Therapy
Treatment for aelurostrongylosis focuses on eliminating the parasites and alleviating symptoms. Antiparasitic medications, particularly ivermectin and fenbendazole, are effective in treating this infection. The dosage and duration of treatment vary depending on the severity of the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. and the cat’s overall health.
In addition to antiparasitic therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions., it may be necessary to administer anti-inflammatory drugsAnti-inflammatory drugs are medications that reduce inflammation. They can be divided into nonsteroidal anti-inflammatory drugs (NSAIDs) and corticosteroids and are used in dogs and cats to reduce Inflammatory conditions and Pain. or antibiotics, especially if a secondary bacterial infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. is present. In severe cases where the cat suffers from significant respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. distress, supportiveSupportive refers to supportive treatments that aim to alleviate symptoms and improve quality of life without directly treating the underlying cause of the disease. oxygen therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. may be required.
It is important to monitor the cat carefully during treatment to ensure the medication is effective and that no negative side effects occur. Regular follow-up examinations by a veterinarian are crucial to assess the progress of the treatment and make adjustments if necessary.
Prognosis and follow-up care
The prognosis for cats with aelurostrongylosis is generally good, especially if the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. is detected and treated early. Most cats respond well to treatment and recover completely without permanent damage.
In cases where the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. is more severe or if the diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. was delayed, recovery may take longer and the cat may be more susceptible to recurring respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. illnesses. With timely and appropriate treatment, the likelihood of complications is low.
It is important to regularly monitor the cat for re-infections after treatment, especially if it remains exposed to a high risk of infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease., for example, through regular hunting or spending time outdoors.
Prevention
To reduce the risk of aelurostrongylosis infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. in cats, it is important to minimize contact with potential intermediate hosts such as snails, snail shells, and small rodents, as these often carry the lungworm larvae. Cat owners should ensure that their cats do not roam outdoors unsupervised, especially in areas where these intermediate hosts are common. Regular deworming can also help reduce the risk of infection.
Furthermore, cat owners should have their cats’ feces regularly tested for parasites to detect potential infections early. A clean environment where feces are quickly removed and disposed of can also help lower the risk of transmission. Cats that have already been infected or live in a high-risk area should be monitored more frequently by a veterinarian.
A balanced diet and generally good health strengthen the cat’s immune systemThe immune system is the body's defense system against infectious agents such as bacteria, viruses, fungi, and parasites. It comprises a complex network of organs, cells, and molecules that work together to protect the body., which can also help to better ward off infections. Finally, it is advisable to seek advice from a veterinarian on the best preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. measures tailored to the cat’s individual situation.
Outlook on current research
Aelurostrongylus abstrusus infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. in cats, also known as aelurostrongylosis, is an increasingly researched topic in veterinary medicine. Scientists and veterinarians worldwide are working to better understand the life cycles, transmission routes, and effects of this lungworm and to develop more effective treatment options. The parasiteA parasite is an organism that lives on or in another living being (the host) and feeds at its expense. Parasites can cause a variety of diseases in animals and humans., a nematode, is known to infect the airways of cats, which can lead to respiratory distress and other health problems.
In recent years, research has focused on the role of intermediate hosts such as snails and small rodents, as these often act as carriers of the larvae to cats. Modern molecular techniques have made it possible to better understand the genetic characteristics of these parasites, which can contribute to a more precise determination of their spread and development.
Another important area of research is the development and improvement of diagnostic methods. While traditional diagnostics often rely on the examination of fecal samples, newer techniques such as serological tests or molecular approaches like polymerase chain reaction (PCR) can enable more accurate and earlier diagnoses. These developments are crucial for detecting the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. at an early stage and improving the chances of successful treatment.
There is also an increasing number of studies dealing with the development of vaccines against Aelurostrongylus abstrusus. Although no market-ready vaccines are available yet, initialInitial means beginning or at the start. In medicine, it can refer to the first symptoms of a disease or the first phase of a treatment process. results show promising approaches that could help reduce the risk of infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. or mitigate its effects in the future.
Regarding treatment, research has recently made some progress in identifying new antiparasiticsAntiparasitics are medications or substances used to treat parasitic infestations, such as worms, protozoa, and ectoparasites. They work by killing the parasites or inhibiting their growth. that are specifically effective against Aelurostrongylus abstrusus. These medications aim to efficiently combat the parasites in the cat’s body while being safe and well-tolerated by the animal. The development of such drugs could significantly improve treatment options and help minimize the health consequences of the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease..
Overall, research on aelurostrongylosis shows that a better understanding of the parasite’s biology and the development of new diagnostic and treatment methods can significantly improve the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. for affected cats. Given the increasing spread of this parasiteA parasite is an organism that lives on or in another living being (the host) and feeds at its expense. Parasites can cause a variety of diseases in animals and humans. in various regions of the world, it is crucial to continue and intensify research in this field.
Frequently asked questions (FAQs)
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What is Aelurostrongylosis? Aelurostrongylosis is a parasiticParasitic refers to diseases or conditions caused by parasites. Parasitic infections can affect the digestive tract, skin, and other organ systems. infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. of the lungs in cats caused by the lungworm Aelurostrongylus abstrusus. The parasiteA parasite is an organism that lives on or in another living being (the host) and feeds at its expense. Parasites can cause a variety of diseases in animals and humans. affects the airways, which can lead to symptoms such as cough, respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. distress, and weight loss.
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How do cats become infected with Aelurostrongylus abstrusus? Cats usually become infected by ingesting intermediate hosts such as snails that are infected with the parasite’s larvae. Occasionally, rodents or birds that have eaten these snails can also serve as a source of infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease..
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What symptoms do infected cats show? The most common symptoms include chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. cough, respiratoryRespiratory refers to breathing or the process of breathing. Respiratory diseases affect the respiratory tract and can impair the ability to breathe effectively. distress, nasal discharge, and in severe cases, vomiting or diarrheaDiarrhea refers to the condition of frequent, watery bowel movements, which can be a sign of infections, digestive disorders, or other health problems.. As the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. progresses, weight loss can also occur.
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How is the infection diagnosed? DiagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is often made by examining fecal samples for larvae. However, modern methods such as serological tests or PCR can provide more accurate results and facilitate diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients..
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How is Aelurostrongylosis treated? Treatment usually consists of administering antiparasitic medications that are specifically effective against the lungworm. Early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. significantly improves treatment outcomes.
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Can humans be infected by cats with Aelurostrongylosis? No, Aelurostrongylus abstrusus is not zoonotic, meaning the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. cannot be transmitted from cats to humans.
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How can an infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. be prevented? An effective preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. measure is controlling the cat’s environment to minimize contact with potential intermediate hosts such as snails and rodents. Regular veterinary check-ups and good parasiteA parasite is an organism that lives on or in another living being (the host) and feeds at its expense. Parasites can cause a variety of diseases in animals and humans. control are also important.
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Is there a vaccineA vaccine is a substance that stimulates the immune system to develop immunity against specific pathogens without causing the disease itself. Vaccines may contain weakened or inactivated pathogens, toxoids, or recombinant antigens. against Aelurostrongylus abstrusus? Currently, there is no commercially available vaccineA vaccine is a substance that stimulates the immune system to develop immunity against specific pathogens without causing the disease itself. Vaccines may contain weakened or inactivated pathogens, toxoids, or recombinant antigens. against Aelurostrongylus abstrusus, although research into potential vaccines is ongoing.
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How common is Aelurostrongylosis in cats? The frequency varies by region, but it is a recognized disease in many parts of the world, especially in areas with a high populationIn veterinary medicine, the term population refers to a group of animals of a particular species living in a specific geographic area or environment. of intermediate hosts such as snails.
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Can a cat be re-infected after successful treatment? Yes, cats can become reinfected if they ingest larvae again. Therefore, it is important to take preventive measures to minimize the risk of reinfectionReinfection refers to the recurrence of an infection in an individual who was previously cured of the same disease. This can be caused by the same or a similar pathogen..