Taeniasis and Cysticercosis Management

Definition

Taeniasis is a tapeworm infection acquired through consumption of raw or inadequately cooked food. Common causative organisms include:

• Taenia saginata (beef tapeworm)

• Taenia solium (pork tapeworm)

• Diphyllobothrium latum (fish tapeworm)

• Hymenolepis nana (transmitted through faecal-oral contamination from humans and dogs)

The disease may lead to:

• Chronic malnutrition (taeniasis)

• Multi-organ dissemination and dysfunction (cysticercosis)

Clinical presentation of taeniasis

• Colicky abdominal pain

• Body weakness

• Loss of appetite or increased appetite

• Constipation

• Diarrhoea

• Pruritus ani

• Hyperexcitability

Investigations for Taeniasis

• Stool examination:

  • Evidence of characteristic ova

  • Proglottids

  • Scolex on wet mount microscopy

Pharmacological treatment of taeniasis

Praziquantel

• Dose: 5–10 mg/kg

• Route: Oral (PO)

• Frequency: Stat

• Duration: Single dose

AND

Magnesium Sulphate

• Dose: 5–10 g dissolved in a glass of water

• Route: Oral (PO)

• Timing: Administer 2 hours after praziquantel

Cysticercosis (Neurocysticercosis)

Overview

Cysticerci most commonly occur in:

• Subcutaneous tissues

• Intermuscular tissues

• Eye

• Brain

The central nervous system is involved in approximately 60–90% of affected patients, resulting in neurocysticercosis.

Clinical presentation of neurocysticercosis

• Convulsions

• Seizures

• Headache

• Nausea

• Vomiting

• Vertigo

• Papilloedema

• Intracranial hypertension

• Personality changes

• Mental status changes

• Neuropsychiatric manifestations

• Behavioural changes

• Learning disabilities (particularly in children and immunocompromised adults)

Investigations for Neurocysticercosis

• Head CT scan

• Brain MRI

Referral

• Refer patients to higher-level centres for further investigation and specialist management.

Pharmacological treatment of neurocysticercosis

Praziquantel

• Dose: 50 mg/kg

• Route: Oral (PO)

• Frequency: Every 24 hours

• Duration: 21 days

OR

Albendazole

• Dose: 15 mg/kg

• Route: Oral (PO)

• Frequency: Every 24 hours

• Duration: 30 days

AND

Dexamethasone

• Dose: 4 mg

• Route: Intravenous (IV)

• Frequency: Every 12 hours

• Duration: Up to 7 days

AND

Carbamazepine

• Initial dose: 200 mg

• Route: Oral (PO)

• Frequency: Every 12–24 hours

• Dose escalation: Gradually increase to 0.8–1.2 g per day in divided doses

Special management considerations

• Hydrocephalus should be treated with surgical shunting.

• Patients with ocular cysticercosis should be referred to an eye specialist.

Possible complications

Taeniasis

• Chronic malnutrition

• Gastrointestinal symptoms

Cysticercosis

• Neurocysticercosis

• Recurrent seizures

• Intracranial hypertension

• Hydrocephalus

• Neuropsychiatric disorders

• Visual impairment

• Multi-organ dysfunction