What tests are conducted for encephalitis?

Written by Zhang Hui
Neurology
Updated on December 05, 2024
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First, it is generally necessary to conduct an EEG test. This test is very convenient and non-invasive for patients. If significant slow waves are detected, encephalitis cannot be ruled out.

Secondly, an MRI of the brain should be performed. If the viral encephalitis is severe, abnormal signals can be observed in areas such as the frontal lobe, temporal lobe, and hippocampus on the MRI, which are of great diagnostic reference value.

Thirdly, lumbar puncture is also very important. It allows for a direct observation of the color of the cerebrospinal fluid, to monitor the pressure of the brain fluid, and to test the cerebrospinal fluid for cell count, protein, sugar, and chloride levels. These tests are very important for the diagnosis and differential diagnosis of encephalitis.

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Written by Zhang Hui
Neurology
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Does encephalitis cause a runny nose?

Encephalitis can potentially cause a runny nose, as it is mainly caused by viral infections. These infections not only invade brain cells, leading to symptoms such as fever, headache, nausea, vomiting, and even seizures related to the nervous system, but can also affect the respiratory tract. If these viruses accumulate in the respiratory tract, particularly in the nasal mucosa, they will definitely cause symptoms such as a runny nose, cough, expectoration, and sore throat. Therefore, it is evident that patients with encephalitis can exhibit symptoms of upper respiratory tract infections. Moreover, some patients initially present with respiratory symptoms, such as a runny nose, before the viruses enter and infect the brain cells. Patients with encephalitis must receive timely treatment, primarily symptomatic treatment to prevent complications, along with antiviral medication for targeted treatment. Most patients have a good prognosis.

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Written by Yan Xin Liang
Pediatrics
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Symptoms of baby encephalitis

Generally speaking, the symptoms of encephalitis in babies usually start with fever. Encephalitis is an infectious disease, and the majority of cases present with fever, which could be either high or low. Next is vomiting. Since small infants cannot express headache, they usually manifest symptoms through crying, irritability, and restlessness. Additionally, there might be lethargy and malaise. Some may experience seizures, and others might have stiff neck, characterized by rigidity of the neck and changes in muscle tone of the limbs, among other symptoms. These are all symptoms of encephalitis.

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Written by Tang Li Li
Neurology
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Is the blood count high in encephalitis?

Not all cases of encephalitis show an increase in blood counts. Elevated blood counts in encephalitis generally occur in bacterial infections, such as the most common pyogenic meningitis. This can cause a significant increase in blood counts, predominantly with neutrophils. Tuberculous meningitis can also show elevated blood counts, but not as prominently as pyogenic meningitis. In cases of viral infection, such as the common herpes simplex virus infection, patients might experience a decrease in blood counts. This is characterized by a reduction in the total number of white blood cells, a lower proportion of neutrophils, and a possible increase in lymphocyte proportion. If the patient has a concurrent lung infection or other bacterial infections at different sites, there might be an increase in blood counts, which can mask the blood abnormalities originally caused by the viral infection.

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Written by Zhang Hui
Neurology
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How to relieve headache from encephalitis

Encephalitis is mainly divided into viral encephalitis, bacterial encephalitis, and tubercular meningitis, among others. Encephalitis usually causes patients to experience fever, headache, nausea, and vomiting. The cause of headaches includes the pain response due to inflammation stimulating the meninges. Moreover, these infections can cause an increase in intracranial pressure, leading to significant symptoms in patients such as headache, nausea, and vomiting. To alleviate headaches, it is important to actively treat the primary disease. This includes administering antiviral drugs for viral infections, and antibiotics for bacterial infections. If the headache is caused by increased intracranial pressure, it is crucial to actively administer dehydrating agents and drugs that lower intracranial pressure to reduce it, thereby relieving the headache. Additionally, the use of glucocorticoids can be combined to manage the treatment, suppress the inflammatory response, and alleviate pain. If the pain is significant, non-steroidal anti-inflammatory drugs may also be administered to relieve the pain. The treatment of pain in encephalitis is a comprehensive issue that requires addressing the pathogen, dehydration, reduction of intracranial pressure, and symptomatic treatment.

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Written by Zhang Hui
Neurology
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Encephalitis belongs to which department?

Encephalitis is primarily a neurological disorder and is an infectious disease of the central nervous system, mainly diagnosed and treated in neurology. There are many causes of encephalitis, with viral encephalitis being the most common. For example, herpes simplex encephalitis is a typical type seen clinically. Patients may experience fever, even with very high temperatures exceeding 40°C, headaches, nausea, and vomiting. If the condition worsens, seizures, coma, and cognitive impairment may occur. These clinical manifestations require further investigations like electroencephalography, cranial MRI, and lumbar puncture. Additionally, there is a specific type of epidemic, known as Japanese encephalitis, which falls under the category of infectious diseases due to its contagious nature.