Shaikh Z. Ahammad

Dr. Shaikh Z. Ahammad


Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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13 June 2023 in Environmental Science & Technology
Verified
Journal Article
Closed access
XYXiaole Yin
Xiaole Yin
XCXi Chen
Xi Chen
XJXiao-Tao Jiang
Xiao-Tao Jiang
YYYing Yang
Ying Yang
BLBing Li
Bing Li
TZTong Zhang
Tong Zhang

4 October 2017 in Environmental Science & Technology
Verified
Journal Article
Open access
MLManisha Lamba
Manisha Lamba
David W GrahamDavid W Graham
David W Graham
SAShaikh Z. Ahammad
Shaikh Z. Ahammad
Increasing antibiotic resistant hospital-acquired infections and limited new antibiotic discovery are jeopardizing human health at global scales, although how hospitals themselves fuel AMR in the wider environment is largely unknown. Antibiotic resistance (AR) from hospitals in countries like India is potentially problematic because of high antibiotic use, overcrowding, and inadequate wastewater containment. Here we quantified fecal coliforms (FC), carbapenem-resistant Enterobacteriaceae (CRE), blaNDM-1, and selected extended-spectrum β-lactam (ESBL) resistant bacteria and genes in 12 hospital wastewater outfalls and five background sewer drains across New Delhi over two seasons. Hospital wastewaters had up to nine orders of magnitude greater concentrations of CRE bacteria and blaNDM-1 than local sewers (depending on the hospital), implying hospitals contribute high concentrations of AR relative to community sources in Delhi, especially during the winter. Significant correlations were found between FC levels (a fecal indictor), and CRE (r =0.924; p =0.005), blaNDM-1 (r=0.934, p=0.009), and ESBL-resistant bacteria (r=0.913, p=0.010) levels across hospital wastewaters, respectively, imp-lying elevated CRE and blaNDM-1 are of patient origin. However, of greater importance to global health, microbial culturing found 18 to 41% of wastewater CRE isolates (n =1447) were on the WHO “critical pathogen” list in urgent need of new antibiotics, and 55% of CRE isolates from larger hospitals carried at least one blaNDM-1 gene. Wastewater releases from New Delhi hospitals may pose a greater AR exposure risk to residents than believed, implying in-hospital antibiotic use must be better controlled and more effective waste treatment is needed for hospital wastewaters.

8 October 2021 in Science of The Total Environment
Verified
Journal Article
Closed access
SRSidra Ghazali Rizvi
Sidra Ghazali Rizvi
SAShaikh Z. Ahammad
Shaikh Z. Ahammad

28 April 2022 in Environmental Pollution
Verified
Journal Article
Closed access
SGSonia Gupta
Sonia Gupta
DGDavid W. Graham
David W. Graham
TST.R. Sreekrishnan
T.R. Sreekrishnan
SAShaikh Z. Ahammad
Shaikh Z. Ahammad

26 September 2022 in Science of The Total Environment
Verified
Journal Article
Closed access
SGSonia Gupta
Sonia Gupta
DGDavid W. Graham
David W. Graham
TST.R. Sreekrishnan
T.R. Sreekrishnan
SAShaikh Z. Ahammad
Shaikh Z. Ahammad

1 December 2017 in Chemosphere
Verified
Journal Article
Closed access
MLManisha Lamba
Manisha Lamba
SAShaikh Z. Ahammad
Shaikh Z. Ahammad