Cyclosporiasis

🦠 Cyclosporiasis

📖 PRELIMS POINTER

🔹 What is Cyclosporiasis?

• Cyclosporiasis is an intestinal parasitic disease caused by Cyclospora cayetanensis, a microscopic, single-celled protozoan parasite.
• The parasite primarily infects the small intestine, resulting in prolonged diarrhoeal illness and gastrointestinal disturbances.
• Humans are the only known natural host of Cyclospora cayetanensis.

🔄 Transmission

• Spreads through the fecal-oral route by consuming food or water contaminated with infective parasite oocysts.
• Commonly associated with contaminated fresh produce such as:
  • Leafy greens
  • Basil
  • Cilantro
  • Raspberries
  • Snow peas
• No direct person-to-person transmission occurs because freshly excreted oocysts require several days to weeks in the environment to become infectious.
• Outbreaks are often linked to poor sanitation and contaminated irrigation or washing water.

🔬 Key Features

• Causative Agent: Cyclospora cayetanensis (Protozoan parasite).
• Incubation Period: Usually about 1 week after exposure.
• Seasonality: Cases commonly increase during the spring and summer months, particularly in warm and humid conditions.
• Diagnosis:
  • Stool microscopy using special staining techniques.
  • Polymerase Chain Reaction (PCR)-based molecular tests.
  • Multiple stool samples may be required due to intermittent shedding of the parasite.
• Resistance: Routine vegetable washing and common disinfectants may not completely eliminate the parasite from contaminated produce.

⚠ Symptoms & Complications

• Primary Symptom
  • Prolonged watery diarrhoea, often recurring over several weeks if untreated.
• Other Symptoms
  • Abdominal cramps
  • Bloating
  • Loss of appetite
  • Nausea
  • Fatigue
  • Low-grade fever
  • Weight loss
• High-Risk Groups
  • Young children
  • Elderly individuals
  • Immunocompromised persons
• Possible Complications
  • Severe dehydration
  • Malabsorption of nutrients
  • Gallbladder inflammation (Cholecystitis)
  • Reactive arthritis (rare)

💊 Treatment & Prevention

• First-Line Treatment
  • Trimethoprim-Sulfamethoxazole (TMP-SMX) administered for 7–10 days.
• Supportive Care
  • Oral or intravenous rehydration to correct fluid and electrolyte loss.
• Immunocompromised Patients
  • May require prolonged or repeated treatment to prevent relapse.
• Preventive Measures
  • Ensure access to safe drinking water.
  • Practice proper hand hygiene.
  • Wash fresh fruits and vegetables thoroughly.
  • Improve sanitation and food safety practices throughout the supply chain.