The HRD Ministry also received 39 complaints of poor quality of food served.
Disclosing these in the Rajya Sabha, Minister of State for HRD Shashi Tharoor said out of the 41 complaints received, actions have been taken in 31 cases by the state governments.
While 11 complaints were received from Uttar Pradesh between 2010 and 2012, seven complaints were received from Bihar during 2011 and 2012.
To another question, HRD Minister M M Pallam Raju informed that the National Accreditation Board for Laboratories (NABL) has been asked to collect samples from the field for testing on parameters such as micro-biological presence or absence of e-coli, chemical parameters such as moisture content, fats, protein and caloric value of the meal.
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"The state governments have also been requested to consider engaging Food Safety and Standards Authority of India, CSIR institute or NABL-recognised labs for carrying out sample checking of the food to ensure quality meal to students," he said.
Raju said the forensic science laboratory department of the Bihar government indicated presence of organic phosphorous in the meal of the children.