Guillain-Barré Syndrome (GBS) is a well-known acute paralytic illness that often arises after infections, especially viral ones. It's the leading cause of sudden muscle weakness and paralysis, usually following respiratory or gastrointestinal infections, with Campylobacter jejuni being the most common culprit.[7, 11]Besides viruses, GBS can also be triggered by bacterial infections like Mycoplasma, Haemophilus influenzae, and Rickettsia rickettsii, as well as protozoal infections such as Leishmania donovani and Plasmodium species, including both Plasmodium falciparum and Plasmodium vivax. In rare instances, GBS has been associated with inflammatory conditions like sarcoidosis and the use of certain medications. [11.12.13.14]
Guillain-Barré Syndrome (GBS) is an immune-mediated, acute inflammatory disorder affecting nerves globally and at any age, where the immune system mistakenly targets nerve antigens due to molecular mimicry. [11, 12] In cases associated with malaria, the immune response during the parasite's asexual stage, involving cytokine release, is believed to cause nerve damage, though the exact mechanism is not fully understood. Immune-mediated damage is thought to drive the development of GBS, with the inflammation triggered by cytokines affecting the axons and leading to demyelination. This could explain the link between malaria infection and GBS. Another possible explanation is that GBS might result from occlusion of the vasa nervorum by malaria parasites or immune complexes.[7, 13, 14]
Guillain-Barré Syndrome (GBS) typically develops rapidly, with symptoms worsening over days to weeks and peaking within about four weeks. Key features include progressive muscle weakness that starts in the legs and spreads upwards, areflexia (absence of reflexes), and sensory symptoms like tingling or numbness, usually beginning in the feet and hands. Patients may also experience severe muscle pain, autonomic dysfunction (affecting heart rate, blood pressure, sweating, and digestion), cranial nerve involvement (leading to facial weakness, swallowing difficulties, or eye movement issues), and in severe cases, respiratory problems requiring mechanical ventilation. [11, 14] In this case, symptoms began with lower limb weakness and areflexia, progressing quickly to flaccid paraparesis, and autonomic dysfunction, and the patient also had AFI symptoms with positive smear, a condition often associated with malaria infections.
The clinical symptoms of malaria vary depending on the parasite type and infection severity. Common symptoms include cyclical fever with chills and sweating, severe headache, intense muscle and joint pain, fatigue, nausea, vomiting, abdominal pain, and sometimes diarrhea. Anemia and jaundice due to liver involvement are also common. Severe malaria, which demands urgent care, may present with impaired consciousness, respiratory distress, acute renal failure, severe anemia, hypoglycemia, and shock. Symptoms typically appear 7 to 30 days after a mosquito bite, though they can manifest later. [3, 6, 7]
Although electrophysiological studies are useful for confirming nerve involvement, they are not always necessary if clinical and CSF findings are strongly indicative of Guillain-Barré Syndrome (GBS). Key indicators of GBS include progressive muscle weakness in multiple limbs, areflexia (absent reflexes), and possibly sensory changes, pain, autonomic dysfunction (such as heart rate variability and blood pressure fluctuations), or cranial nerve issues. CSF analysis showing elevated protein levels with a normal white blood cell count (cyto-albuminogenic dissociation) supports the diagnosis, especially when there is a recent history of infection.[11, 15, 16, 17] In this case, the neurological signs suggested progressive lower motor neuron paralysis with areflexia, autonomic dysfunction, and paraesthesia, while CSF analysis confirmed cyto-albuminogenic dissociation. The patient also had confirmed Plasmodium falciparum malaria. Typically, the interval between fever and weakness ranges from 1 to 6 weeks, but this case showed a seven-day delay. This report illustrates that GBS may follow Plasmodium falciparum malaria.
Treatment of Guillain-Barré Syndrome (GBS) primarily involves supportive care, managing symptoms, and addressing the autoimmune response. Intravenous Immunoglobulin (IVIG) and Plasma Exchange (plasmapheresis) are commonly used first-line therapies to reduce the immune attack on the nerves. Although GBS can resolve without these treatments like this case, recovery may be slower and more variable. Supportive care is crucial, especially for respiratory management, with mechanical ventilation required in severe cases. Pain management strategies help alleviate severe muscle pain, while physical therapy is essential for improving strength, mobility, and function, and preventing complications from immobility. [11.14.17] In this case, the patient was managed with gabapentin for pain, physiotherapy, and labetalol for autonomic dysfunction; she did not require mechanical ventilation.