जेब्ला आनजादसालिनि आनजातनि फिथायखौ गोबाङै मिथिनाय जाया एम्फौ - एनला नायसंनाया थि जानो बाहायनो एबा जानो हाथाव सोमजिनायनि जाहोनखौ नेवसिनाय ।
Entomological investigations are useful to confirm or rule out the probable cause of the outbreak especially if results of laboratory tests are not available .