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This case report documents the experience of a 5-year-old girl who showed signs of retinal degeneration as the initial symptom of neuronal ceroid lipofuscinosis (NCLs). She originally presented with visual failure, which rapidly progressed to near total bilateral blindness. Two years later, she developed seizures and cognitive impairment, leading to a diagnosis of NCL7 resulting from a homozygote mutation in the MFSD8 gene. This case underscores the importance of considering NCLs as a potential diagnosis in cases of cone-rod dystrophy and visual loss as the primary clinical feature. It also emphasizes the early onset and initial presentation of retinal degeneration associated with NCL7, before other signs and symptoms manifest, as the second documented case of its kind. Due to the potential for NCL7 to present initially with visual loss before other hallmark signs, it is crucial to consider it among various syndromic and non-syndromic disorders in the differential diagnosis., Competing Interests: The authors declare no conflicts of interest., (© 2024 The Author(s). Clinical Case Reports published by John Wiley & Sons Ltd.)

Continuous and indiscriminate use of pesticides, especially in tropical countries for public health or agriculture purpose, has led many vector populations to become resistant to organochlorides, organophosphates, and even to carbamates and pyrethroids. Development of resistance by a vector population has been one of the reasons for the failure of the control measures in many countries. This investigation demonstrates the efficacy of piperonyl-butoxide (PBO) with deltamethrin, as pyrethroid insecticide, against the field-collected mosquitoe larvae of five species, Aedes aegypti, Anopheles culicifacies, An. stephensi, An. vagus, and Culex quinqufasciatus, and two morphological variants of Cx. tritaeniorhynchus (type A from grand pools of Mysore city and type B from rice fields of Mandya district). For testing the synergistic effect of PBO, stock solutions of deltamethrin and PBO were mixed in 1:6 ratio. The synergistic ratio and the percent suppression in deltamethrin tolerance were calculated by using LC(50) values. From the results, it is clear that, PBO is an effective synergist with deltamethrin against all of species undertaken in this investigation. So, it is suggested that PBO is a good synergist in this area for decreasing the use of pesticides in environment in vector control.