Dr. Madhu  Sharma  Md image

Dr. Madhu Sharma Md

111 E 210Th St Montefiore Medical Center
Bronx NY 10467
718 412-2538
Medical School: Other - Unknown
Accepts Medicare: No
Participates In eRX: No
Participates In PQRS: No
Participates In EHR: No
License #: 254441
NPI: 1003003880
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4-Nonylphenol induced DNA damage and repair in fish, Channa punctatus after subchronic exposure. - Drug and chemical toxicology
The detection of a possible DNA damaging effect of 4-nonylphenol (NP) after subchronic exposure and repair after cessation of exposure to Channa punctatus is the aim of the present study. Channa punctatus was exposed to different concentrations (0.15 mg/l, 0.10 mg/l, and 0.07 mg/l) of NP along with positive control (ethanol) and negative control (water) for 90 d and after that allowed to recover for 30 d. Comet assay and micronucleus assay were used for the determination of DNA damage and repair by using blood cells. The effect was seen after 30, 60, and 90 d of exposure. Time- and dose-dependent increase in DNA damage was found as revealed by both the end points studied. Evident recovery was observed after 30 d of cessation of exposure. Blood cells were successfully appeared to achieve the restoration of DNA integrity. Hence, the study aimed to improve the knowledge of the genetic hazard to fish associated with NP exposure and provide a wide scope to discover the efficiency of DNA repair system in C. punctatus.
Study on DNA damaging effects of 4-nonylphenol using erythrocytes from peripheral circulation, gill and kidney of fish Channapunctatus. - Journal of environmental biology
The present study aimed to evaluate the genotoxic effect of 4-nonylphenol (NP) on blood cells of fish Channapunctatus. Fish were exposed to three sublethal concentrations (0.15 mg l⁻¹; 0.31 mg l⁻¹ and 0.63 mg l⁻¹) of 4-NP for 24, 48, 72 and 96 hrs. Blood cells from kidney, gills and peripheral circulation were analyzed for the presence of micronuclei and other changes in the erythrocytes. Significant changes were observed in all the experimental groups tested when compared with control. Highest genotoxicity was observed in blood cells obtained from gills (MN-2.92%, aberrant cell- 70.64%), followed by kidney (MN-1.34%, aberrant cells-64.94%), were least effect was observed in blood cells obtained from peripheral circulation (MN-0.88%, aberrant cells-46.27%).Therefore, micronucleus test performed on blood cells obtained from different sources showed that gills were more sensitive as compared to peripheral blood and kidney revealing genotoxic effect of 4-NP on fish C. punctatus.
Case Report: Escherichia fergusonnii - Pathogen in Urinary Tract Infection. - Infectious disorders drug targets
Urinary tract infections are one of the leading cause of morbidity in admitted patients. Most commonly caused by Escherichia coli, but there are some variants which are commonly reported in urinary tract infection. This study was about to speciate such isolate like E.fergusonnii and find out its antibiogram.
Fosfomycin use in multi drug resistant uropathogenic Escherichia coli. - Infectious disorders drug targets
Escherchia coli isolated, from urine samples were studied for their antibiotic susceptibility patterns, with special reference to the new antimicrobial compound fosfomycin and their correlation with various virulence factors.The mid stream urine samples received in the department were processed and identification was done by using the standard culture and identification techniques. The antibiotic susceptibility testing was done by modified Kirby-Bauer disk diffusion and the disk diffusion method was used to confirm the ESBL, AmpC, MBL production by the UPEC. Various virulence factors like hemolysin, haemagglutinaton, gelatinase, siderophore production, biofilm formation, serum resistance and hydrophobicity were detected.Fosfomycin was found to be most effective agent (100%) against uropathogenic E.coli followed by netilmicin (89.5%). The least effective agents were ampiciilin and cotrimoxazole. Twenty nine percent (29%) isolates were found to be multi drug resistant (MDR).The testing of the newer therapeutic agents like fosfomycin will add on to therapeutics for UTI's.
Acinetobacter lwoffii an emerging pathogen in neonatal ICU. - Infectious disorders drug targets
Acinetobacter species are ubiquitous in the environment and are important causative agent for nososcomial infection especially in immunocompromised patients. Multi drug resistant Acinetobacter lwoffii are emerging as a pathogen in neoanatal sepsis.This study was aimed to evaluate the clinical and antibiotic profile of Acinetobacter lwoffii.This study was done on blood samples from neonates admitted to neonatal intensive care unit during a period of one year from January to December 2012, who developed Acinetobacter infection. The diagnosis of isolates and antibiotic susceptibility testing was done by both conventional as well as by automated system.Out of total 13,133 blood samples received for culture, 1418(10.8%) were from NICU. Ninety (6.3%) isolates were found to be positive for the growth of Acinetobacter species. Of these isolates 31.11% were found to be Acinetobacter lwoffii, 68.9% were Acinetobacter baumannii calcaetius complex. Acinetobacter lwoffii isolates were most commonly sensitive to imepenem 16(57%), cotrimoxazole 9(32%), ciprofloxacin 6(21%) followed by amoxyclavulanic acid 2(7%) and cefuroxime 1(3.5%).Multi drug resistant Acinetobacter lwoffii infection is increasing particularly in premature and very low-birth weight neonates. Judicious and timely antibiotic use in NICUs are one of the important key in controlling multi-drug resistant Acinetobacter infection and improving clinical outcome.
Biofilm and multidrug resistance in uropathogenic Escherichia coli. - Pathogens and global health
Escherichia coli is known as causative agent of urinary tract infections (UTIs) tends to form microcolonies in mucosa lining of urinary bladder known as biofilm. These biofilms make the organism to resist the host immune response, more virulent and lead to the evolution of antibacterial drug resistance by enclosing them in an extracellular biochemical matrix.This study was done to know the association of various virulence factors and biofilm production in uropathogenic E. coli (UPEC) and antibiotic susceptibility pattern.This study was conducted in Pt. B.D. Sharma PGIMS, Rohtak, Haryana during a period of 1 year from January 2011 to December 2011.Biofilm was detected by microtiter plate (MTP) method, and various virulence factors like hemolysin, hemagglutination, gelatinase, siderophore production, serum resistance, and hydrophobicity were detected. The antibiotic susceptibility testing was done by modified Kirby-Bauer disk diffusion and the disk diffusion method was used to confirm the ESBL, AmpC, MBL production by the UPEC statistical analysis used: The data were analyzed by using SPSS version 17.0. A two-sided P-value of less than or equal to 0·05 was considered to be significant.Biofilm production was found in 18 (13·5%) isolates, more commonly in females (two times). These isolates were found to be resistant to antibiotics common in use and were 100% MDR.Biofilm production makes the organism to be more resistant to antibiotics and virulent as compared to non-biofilm producers.
Comparison of ELISA and Microscopy for detection of Cryptosporidium in stool. - Journal of clinical and diagnostic research : JCDR
Cryptosporidiosis, a diarrheal disease caused by the protozoan parasite Cryptosporidium spp. has become recognized as one of the most common causes of water borne diseases in humans.To compare the sensitivity of ELISA and Microscopy for detection of Cryptosporidium in stool samples Materials and Methods: The study was conducted in the Department of Microbiology of PT. B.D. Sharma PGIMS Rohtak, between January 2011 to june 2011 on 50 stool samples, which were processed for detection of cryptosporidial antigen by ELISA and detection of cysts by microscopy (Modified Ziehl and Nelsen staining).This was a prospective study conducted in the Department of Microbiology in PT. BD Sharma, PGIMS, Rohtak, India.Out of total, 50 stool samples eighteen (36%) samples were found positive for Cryptosporidium cysts by microscopy in comparison to 3(6%) stool samples which were found positive for cryptosporidial antigen by ELISA. Samples found positive with ELISA were also positive with microscopy. Sensitivity, specificity, positive predictive value and negative predictive value for ELISA was 16.7%, 100%, 100% and 68% respectively.The study concludes that stool microscopic Modified acid fast staining is more sensitive method than ELISA for detection of Cryptosporidium in stool samples but the specificity of ELISA was more than microscopy.
Biotechnological approaches to the production of shikonins: a critical review with recent updates. - Critical reviews in biotechnology
Shikonins are commercially important secondary compounds, known for array of biological activities such as antimicrobial, insecticidal, antitumor, antioxidants, etc. These compounds are usually colored and therefore have application in food, textiles and cosmetics. Shikonin and its derivatives, which are commercially most important of the naphthoquinone pigments, are distributed among members of the family Boraginaceae. These include different species of Lithospermum, Arnebia, Alkanna, Anchusa, Echium and Onosma. The growing demand for plant-based natural products has made this group of compounds one of the enthralling targets for their in vitro production. The aim of this review is to highlight the recent progress in production of shikonins by various biotechnological means. Different methods of increasing the levels of shikonins in plant cells such as selection of cell lines, optimization of culture conditions, elicitation, in situ product removal, genetic transformation and metabolic engineering are discussed. The experience of different researchers working worldwide on this aspect is also considered. Further, to meet market demand, the needs for continuous and reliable production systems, as well as future prospects, are included.
Mass propagation of Cymbidium giganteum Wall. ex Lindl. using in vitro seedlings. - Indian journal of experimental biology
In vitro seedlings were used as explants for protocorm like bodies (PLBs) production which in turn were used for regeneration purpose. PLBs were induced from the base of seedlings (1.0-1.5 cm in size) in MS + BAP (8.88 microM). After 90 days of inoculation, PLBs production rate started declining and most of the PLBs turned into plantlets. Preculture of seedlings in 1.0 microM thidiazuron (TDZ) for 7 days and transfer to BAP supplemented medium resulted in production of 16 PLBs per seedling within 90 days of culture. Increase of TDZ concentration to 2.5 microM and preculture time 15 days, resulted in induction of highest number of PLBs (19 PLBs per seedling) in the basal medium. The results emphasized the importance of thidiazuron (TDZ) concentration and preculture time for PLBs proliferation from the base of seedlings. The PLBs thus produced were used for regeneration studies. Irrespective of single, segmented or clumps of PLBs, the regeneration response was 100% in 2,4-D (4.52 microM) and KN (4.64 microM) but when KN was replaced by BAP (8.88 microM), response was observed only in clumps of PLBs, whereas in single and segmented ones it was 99 and 97%, respectively. Regenerants developed stout root system in half strength M medium supplemented with 2.84 microM of IAA and transferred to greenhouse with 90% survival. The present study holds tremendous potential as the mother plant is not destroyed and PLBs are produced as a continuous system.
In vitro flowering--a system for tracking floral organ development in Dendrocalamus hamiltonii Nees et Arn. ex Munro. - Indian journal of experimental biology
Dendrocalamus hamiltonii plants are slender and tall (15-25 m) thereby, rendering tagging, sampling and tracking the development of flowers difficult. Therefore, a reproducible system of in vitro flowering was established for tracking the stages of flower development. MS medium supplemented with 2.22 microM 6-benzylaminopurine, 1.23 microM indole-3-butyric acid and 2% sucrose was optimized as the flower induction medium (FIM) wherein 28 and 42 days were required for the development of gynoecium and androecium, respectively. Six distinct stages of in vitro flower development were identified, and the flowers were comparable with that of in planta sporadic flowers. Pollen viability of the in vitro flowers was higher than those of in planta ones. The in vitro system developed in the present study facilitates easy tracking of different stages of flower development under controlled environmental conditions. It can also be used for medium- or long-term storage of pollens and manipulation of in vitro fertilization.

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