Background – Vector borne diseases are major public health concern in Mumbai. A tertiary hospital reported increased number of cases of dengue and a death of resident doctor living in campus, in spite of dengue control measures going in full–swing in city. Project was initiated to do environmental mapping, source and reservoir identification, inter–sectoral coordination and contain the outbreak.

Methods – An intensive search for mosquito breeding sites was done by five teams of doctors in and around campus of hospital including hostels to quickly contain the outbreak.

Results – Mosquito breeding was observed in overflow aperture of wash–basins of hostel. This was an unusual site formed due to peculiar design of wash–basin.

Conclusion – Dengue positive patients are taking treatment on OPD & IPD basis. Probability of mosquitoes carrying virus is high. One has to be vigilant about known as well as new potential breeding sites and take prompt action to contain them.