Hatha, A A M; Vivekanandhan, G; Lakshmanaperumalsamy, P(Elsevier, January 26, 2004)
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Abstract:
Five hundred and thirty six samples offishes and 278 prawn samples from the major fish market ofCoimbatore, South India,
were analysed for the prevalence of Aeromonas hydrophila over a period of2 years (June 1997–May 1999). The prevalence level of A.
hydrophila varied from 17.62% in prawns to 33.58% in fishes. More than 30% of the popular table fishes such as Sardinella
longiceps, Rastrelliger kanagurta, Mugil cephalus and Caranx sexfasciatus were tested positive for this organism. Among the
different species of the prawns analysed, Penaeus semisulcatus showed higher incidence (23.52%). Seasonal variation in the
prevalence levels of A. hydrophila in fish and prawns revealed a higher prevalence during the monsoon season during 1997–98 and
1998–99. Of the different body parts of the fishes analysed for A. hydrophila, the intestinal samples showed higher prevalence
(38.43%), followed by body surface (32.46%) and gill (29.10%). Considering the psychrotrophic nature and role of A. hydrophila as
a pathogen ofemerging importance, the considerably high levels ofthis organism in a popular food item such as fish and prawn
raises serious concern
Hatha, A A M; Vivekanandhan, G; Savithamani, K; Lakshmanaperumalsamy, P(Elsevier, November 27, 2001)
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Abstract:
A total of 319 strains of Aeromonas hydrophila were isolated from 536 fish and 278 prawns for a 2-year period. All the
strains were tested for resistance to 15 antibiotics and 100% of the strains was resistant to methicillin and rifampicin followed by
bacitracin and novobiocin (99%). Only 3% of the strains exhibited resistance against chloramphenicol. The multiple antibiotic
resistance (MAR) indexing of A. hydrophila strains showed that all of them originated from high-risk sources
Description:
International Journal of Food Microbiology 76 (2002) 165– 168
Hatha, A A M; Suresh, T; Srinivasan, D; Lakshmanaperumalsamy, P(Microbes And Enviornments, June 19, 2000)
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Abstract:
The incidence of salmonella and escherichia coli in chicken retail outlets in a residential area of coimbatore, Tamilnadu India was studied with the view that accessories may be a source of cross contamination.Accessories like cages,knives ,chopping boards weighing balance trays and the hands of butcher were examined.A toatal of 14 salmonella as well as 31 E.coli were isolated from different sources. The incidence of E.coli was higher than that of Salmonella.The highest incidence of Salmonella was found in chopping boards and the maximum level of E.Coli was detected in cages.
Description:
Microbes and Enviornments,Vol.15,No.3,173-181,2000
Hatha, A A M; Suresh, T; Sreenivasan, D; Nathan, Sangeetha; Lakshmanaperumalsamy, P(Elsevier, April 8, 2005)
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Abstract:
A study was conducted to determine the incidence of Salmonella enterica serovar Enteritidis and other Salmonella serovars on
eggshell, egg contents and on egg-storing trays. A total of 492 eggs and 82 egg-storing trays were examined over a period of 1 year
from different retail outlets of a residential area of Coimbatore city, South India. Salmonella contamination was recorded in 38 of
492 (7.7%) eggs out of which 29 was in eggshell (5.9%) and 9 in egg contents (1.8%). Around 7.5% of the egg-storing trays were also
found to be contaminated with Salmonella. Serotyping of the Salmonella strains showed that 89.7% of the strains from eggshell,
100% of the strains from egg contents and 71.4% of the strains from egg-storing trays were Salmonella Enteritidis. Other
serovarvars encountered were S. Cerro, S. Molade and S. Mbandaka from eggshell and S. Cerro from egg-storing trays. Seasonal
variations in the prevalence pattern were identified with, a higher prevalence during monsoon months followed by post-monsoon
and premonsoon. Further examination of the Salmonella strains was carried out by testing their antimicrobial sensitivity against 10
commonly used antimicrobials. Results revealed high prevalence of multiple antimicrobial resistance among these strains suggesting
possible prior selection by use of antimicrobials in egg production
Hatha, A A M; Abirosh, Chandran(Elsevier, January 11, 2005)
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Abstract:
Microcosm studies have been carried out to find out the relative survival of Escherichia coli and Salmonella
typhimurium in a tropical estuary. Survival has been assessed in relation to the important self-purifying parameters such
as biotic factors contained in the estuarine water, toxicity due to the dissolved organic and antibiotic substances in the
water and the sunlight. The results revealed that sunlight is the most important inactivating factor on the survival of E.
coli and S. typhimurium in the estuarine water. While the biological factors contained in the estuarine water such as
protozoans and bacteriophages also exerted considerable inactivation of these organisms, the composition of the water
with all its dissolved organic and inorganic substances was not damaging to the test organisms. Results also indicated
better survival capacity of E. coli cells under all test conditions when compared to S. typhimurium