Onko Bcg 50 (Live Bcg Bacilli (Bacillus Calmette-Guerin), Brasilian Moreau Substrain)

Onko Bcg 50 is a live‑attenuated BCG vaccine used in immunotherapy and prophylaxis within the urinary‑tract and respiratory disease pathways.

• Non‑muscle‑invasive bladder cancer: reduces recurrence and progression after transurethral resection.
• High‑risk carcinoma in situ of the bladder: induces durable complete responses.
• Prevention of severe forms of tuberculosis in high‑risk populations: provides long‑lasting cellular immunity.
• Adjunctive therapy in certain pediatric bladder‑related conditions: supports immune‑mediated disease control.
• Research use in immunological studies: serves as a model antigen for vaccine development.

• The Brazilian Moreau strain of live BCG bacilli stimulates a robust Th1‑type cellular immune response. Viable bacilli are internalised by antigen‑presenting cells, leading to secretion of cytokines such as IFN‑γ, IL‑2 and TNF‑α, which activate cytotoxic T‑cells and natural killer cells. This immune activation creates an inhospitable environment for malignant urothelial cells and enhances host defence against Mycobacterium tuberculosis.

Onko Bcg 50 may cause a range of local and systemic reactions following intradermal administration.

Common Side Effects

• Injection site erythema: redness at the site of injection.
• Local swelling: mild to moderate induration around the injection area.
• Low‑grade fever: transient temperature rise within 24‑48 hours.
• Fatigue: mild tiredness reported by some recipients.
• Cystitis‑like symptoms: mild urinary urgency or frequency.

Serious or Rare Side Effects

• Disseminated BCG infection: systemic spread of live bacilli requiring antimicrobial therapy.
• Severe allergic reaction: anaphylaxis or angioedema.
• Persistent high‑grade fever: fever lasting more than 48 hours.
• Organ‑specific granulomatous inflammation: e.g., hepatic or pulmonary granulomas.
• Sepsis: bacterial bloodstream infection secondary to vaccine strain.

Before using Onko Bcg 50, clinicians should evaluate patient history and follow handling guidelines.

• Immunocompromised patients: avoid use or assess risk‑benefit carefully.
• Pregnancy: contraindicated unless benefits outweigh potential risks.
• Breastfeeding: discontinue if infant shows signs of infection.
• Prior BCG vaccination: consider timing and potential sensitisation.
• Concomitant immunosuppressive therapy: monitor closely for infection.
• Store at 2‑8°C: keep refrigerated, protect from light, do not freeze or shake.

Onko Bcg 50 can interact with other agents that modify immune function.

Major Interactions (Avoid)

• Live attenuated vaccines: concurrent administration may increase infection risk.
• Systemic corticosteroids: high‑dose regimens can suppress vaccine‑induced immunity.

Moderate Interactions (Monitor Closely)

• Immunomodulatory biologics (e.g., anti‑TNF agents): may reduce efficacy.
• Chemotherapeutic agents: timing adjustments may be needed to avoid overlapping toxicity.
• Antifungal azoles: potential alteration of immune response dynamics.
• Cytokine‑targeting therapies: may interfere with intended Th1 activation.