Amidst a 55% increase in chikungunya cases this year, the health department plans to conduct genomic sequencing of samples to identify potential mutations. Uncommon symptoms like hyperpigmentation and neurological issues have surfaced. Health officials in Mumbai have noted a significant rise in chikungunya viral fever cases compared to the previous year, prompting them to investigate possible genetic mutations in the virus through genomic sequencing of select positive samples. The presence of rare symptoms such as hyperpigmentation and neurological problems has been attributed to potential co-infections with dengue or Japanese encephalitis, according to Dr. Mahendra Jagtap, the joint director of the vector control program. The state has established a rapid action team to analyze the reasons behind the increase in chikungunya cases, aiming to provide guidelines for officials at various levels. Additionally, guidelines have been issued for the collection and analysis of blood samples from patients showing neurological symptoms like paralysis and hyperpigmentation, with the goal of identifying any neurotropic virus and conducting genomic sequencing. Dr. Rajesh Karyakarte from B J Medical College highlighted the importance of genomic sequencing in detecting mutations in the virus."We will prioritize sequencing once we receive enough samples, especially from patients in the intensive care unit or with severe symptoms," stated the doctor. Private sector hospitals in the city reported a significant increase in chikungunya cases this year, with some patients requiring hospitalization for 10 to 15 days due to high fever and neurological complications. Children have also been affected, as evidenced by an eight-month-old boy admitted to SRCC Children's Hospital in Haji Ali in early August. At Surya Children's Hospital in Santa Cruz, pediatrician Dr. Bhupendra Avasthi noted that children born to mothers who tested positive for chikungunya may exhibit hyperpigmentation, a known symptom of the disease.