The local outbreak of dengue in Patharibagh area of Dehradun city seems be contained now as no new case of the disease is reported from here in last seven days. The last case of Dengue from Patharibagh was reported on August 8. However, the number of dengue affected people in localities in immediate vicinity of Patharibagh is continuing to pour in, keeping the district health authorities on tenterhooks in the process.
The District Vector borne diseases officer, JP Bahuguna confirmed that the disease in Patharibagh area is now contained. “We have reported 149 cases of dengue from Patahribagh this season, the last case reported from the area was on August 8,’’ he informed.
The department data further reveals that the number of dengue affected people in Patharibagh and its adjoining areas stands at 230 till Tuesday afternoon.
The incidence of Dengue in Patharibagh was first reported on July 15 and thereafter the disease assumed epidemic proposition in the small area as almost every household here came under threat of the disease. Experts attributed this sudden outbreak of disease to a phenomenon called Tran Ovarian Transmission.
In it the eggs of the dengue infected female of previous season get hatched in large numbers on attainment of favorable conditions. These eggs though laid in last season had developed a cyst around themselves and they undergo a phase of dormancy to ward off non favorable phase.
On attainment of favorable conditions with the onset of monsoon these eggs got hatched and released mosquitoes infected with virus in large numbers.
Since concentration of these mosquitoes is more in a particular area local outbreak of the disease is reported. Following outbreak of disease, the Chief Minister and health minister visited Patharibagh and directed health officials to continue camping in the area till the disease is decimated from here.
Meanwhile, the number of dengue affected people in Dehradun mounted to 320 with 13 new cases of disease reported on Tuesday. The additional director, communicable disease, Dr Kiran Bisht said that 333 cases of dengue are reported in the state. After Dehradun, the only other district where the dengue cases are being reported is Nainital with 13 cases of the dreaded disease. She said that samples of 4239 suspected people have been collected for Enzyme linked Immunosorbent Assay (ElISA) test in the State out of which 4055 have been collected from Dehradun district alone.