Suitability of log-linear models to evaluate the microbiological quality of baby clams (Chamelea gallina L.) harvested in the Adriatic Sea

2000 ◽  
Vol 54 (1-2) ◽  
pp. 63-74 ◽  
Author(s):  
Fausto Gardini ◽  
Carlo Trivisano ◽  
Rosalba Lanciotti ◽  
Mirko Maffei ◽  
Maria Elisabetta Guerzoni
Keyword(s):  
Linear Models ◽  
Adriatic Sea ◽  
Microbiological Quality ◽  
Chamelea Gallina ◽  
Log Linear

Environmental Factors Affecting Escherichia coli Concentrations in Striped Venus Clam (Chamelea gallina L.) Harvested in the North Adriatic Sea

2017 ◽  
Vol 80 (9) ◽  
pp. 1429-1435 ◽  
Author(s):  
Giulia Tabanelli ◽  
Chiara Montanari ◽  
Aldo Gardini ◽  
Mirko Maffei ◽  
Chiara Prioli ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Environmental Factors ◽  
Adriatic Sea ◽  
Microbiological Quality ◽  
Environmental Parameters ◽  
E Coli ◽  
The North ◽  
Chamelea Gallina ◽  
North Adriatic Sea

ABSTRACT The aim of this work was to evaluate the microbiological quality of striped venus clams (Chamelea gallina L.) harvested in the north Adriatic Sea during an 8-year monitoring period. A total of 387 samples were analyzed to assess the presence of Escherichia coli. Environmental parameters (salinity, pH, dissolved oxygen, seawater temperature, and freshwater outflow) were collected to find out a possible relationship between the E. coli counts and environmental factors. The results evidenced that the microbiological quality of the clams was good, with only about 5% of the samples not complying with European and Italian regulations for this product, that is, with E. coli counts higher than 230 most probable number (MPN) per 100 g of flesh and intravalvar liquid. Statistical analyses revealed a relationship between microbial contamination and the season and water temperature, probably due to the difference in the filtering activity of the mollusks. However, the main factor affecting the E. coli concentration in the clams turned out to be the flow rate of Marecchia, the major river that reaches the sea in the area of harvesting. In fact, a model fitted to evaluate the probability of finding a higher E. coli count in relation to the environmental parameters evidenced that it was an increase of the level of the Marecchia led to a higher probability of elevated E. coli contamination. This result could be explained by the higher supply of both nutrients and coliforms (including E. coli) when the river is higher and by the anthropogenic characteristics of the lands crossed by the river.

Nutritional and commercial quality of the striped venus clam, Chamelea gallina, from the Adriatic sea

2007 ◽  
Vol 101 (3) ◽  
pp. 1063-1070 ◽  
Author(s):  
Elena Orban ◽  
Gabriella Di Lena ◽  
Teresina Nevigato ◽  
Irene Casini ◽  
Roberto Caproni ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Chamelea Gallina

scholarly journals Microbial Indicators of Coastal Water in Albania

2021 ◽  
Vol 17 ◽  
pp. 232-236
Author(s):  
Milidin Bakalli ◽  
Ilirjan Malollari ◽  
Julis Selamaj
Keyword(s):  
Adriatic Sea ◽  
Microbiological Quality ◽  
Summer Season ◽  
Ionian Sea ◽  
Fecal Indicators ◽  
European Standard ◽  
High Concentration ◽  
European Standards ◽  
Seawater Samples

Beaches located in Durres and Himara are the most attractive sites in Albania. The purpose of this study is to assess the microbiological quality of seawater in these beaches that are frequented during the summer season. Seawater samples were tested mainly for Eschericia coli and fecal enterococci in accordance with European standards. Water samples (36) were collected in Currila and Plepa beach, located on the Adriatic Sea, and Jala beach located on the Ionian Sea. The monitoring of these sites was done during three years 2017- 2019 from June to September. Plepa beach has the highest concentaration of Eschericia coli 600-650 CFU/100ml, followed by Currila with 580-600 CFU/100ml. While Jala beach results in a smaller pollution 260-300 CFU/100ml. Although the presence of faecal enterococci, the most polluted beaches are Currila and Plepa with 220-320 CFU/100ml and 260-300 CFU/100ml respectively. While Jala beach results less colonies respectively 120-250 CFU/100ml. Based on these data, it is shown a high concentration of fecal indicators in these beaches, especially at the Adriatic Sea. According to the European standard, water is classified as “bed” status. Jala beach is classified as “good” status. The pollution increases during July and August. These results emphasize the necessity to monitor these sites periodically to prevent the risk of pollution that may come from different factors.

scholarly journals Preliminary investigation on the microbiological quality of edible marine gastropods of the Adriatic Sea, Italy

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Patrizia Serratore ◽  
Emanuele Zavatta ◽  
Giorgia Bignami ◽  
Luna Lorito
Keyword(s):  
Adriatic Sea ◽  
Scientific Information ◽  
Preliminary Investigation ◽  
Microbiological Quality ◽  
Mean Value ◽  
Whole Body ◽  
Marine Gastropods ◽  
E Coli ◽  
Vibrio Spp

According to the European Legislation, marine gastropods placed unprocessed on the market must comply with the same requirements established for live bivalve molluscs but, being considered not filterfeeding and unable to concentrate fecal contaminants, they may be harvested outside the classified areas. Despite this statement, little scientific information is available on the microbiological quality of these animals. The aim of the present study was to investigate 28 batches of edible snails of the Adriatic Sea, namely Nassarius mutabilis and Bolinus brandaris, with respect to i) smell and viability, by a method here reported; ii) the bacterial component of the whole body referred to E. coli, Vibrio spp., V. parahaemolyticus, V. vulnificus, V. cholerae and V. alginolyticus. A total of 21 batches of N. mutabilis and 7 batches of B. brandaris were analyzed. Batches of both species retrieved from the primary production were all largely composed of viable animals, had saltwater/neutral smell, and showed mean value of Vibrio spp. of 5,34 and 5,79 log10 UFC g-1 in N. mutabilis and B. brandaris respectively. 47% of the batches of N. mutabilis retrieved from the market, were largely composed of dead animals, had acrid/nasty smell, and showed mean value of Vibrio spp. of 6,53 log10 UFC g-1. E. coli, V. vulnificus and V. cholerae were never detected, but all samples were positive for V. alginolyticus. One sample of B. brandaris was positive for V. parahaemolyticus genotyped by PCR at the specie level (ToxR+) and positive for the thermostable direct hemolysin gene (tdh+).

Microbiological quality of ready to hang enteral formulas

2005 ◽  
Vol 30 (03) ◽  
Author(s):  
J Kehr ◽  
B Morales ◽  
P Contreras ◽  
L Castillo ◽  
W Aranda
Keyword(s):  
Microbiological Quality ◽  
Enteral Formulas

When and why are log-linear models self-normalizing?

2015 ◽  
Author(s):  
Jacob Andreas ◽  
Dan Klein
Keyword(s):  
Linear Models ◽  
Log Linear

Impact of Raw Materials and Processing Techniques on The Microbiological Quality of Egyptian Domiati Cheese

2020 ◽  
Keyword(s):  
Raw Materials ◽  
Microbiological Quality ◽  
Raw Milk ◽  
Plate Count ◽  
E Coli ◽  
Fresh Cheese ◽  
Processing Techniques ◽  
The Impact ◽  
Total Yeast

Domiati cheese is the most popular brand of cheese ripened in brine in the Middle East in terms of consumed quantities. This study was performed to investigate the impact of the microbiological quality of the used raw materials, the applied traditional processing techniques and ripening period on the quality and safety of the produced cheese. Three hundred random composite samples were collected from three factories at Fayoum Governorate, Egypt. Collected samples represent twenty-five each of: raw milk, table salt, calf rennet, microbial rennet, water, environmental air, whey, fresh cheese, ripened cheese & swabs from: worker hands; cheese molds and utensils; tanks. All samples were examined microbiologically for Standard Plate Count (SPC), coliforms count, Staphylococcus aureus (S. aureus) count, total yeast & mould count, presence of E. coli, Salmonellae and Listeria monocytogenes (L. monocytogenes). The mean value of SPC, coliforms, S. aureus and total yeast & mould counts ranged from (79×102 CFU/m3 for air to 13×108 CFU/g for fresh cheese), (7×102 MPN/ cm2 for tank swabs to 80×106 MPN/ml for raw milk), (9×102 CFU/g for salt to 69×106 CFU/g for fresh cheese) and (2×102 CFU/cm2 for hand swabs to 60×104 CFU/g for fresh cheese), respectively. Whereas, E. coli, Salmonella and L. monocytogenes failed to be detected in all examined samples. There were significant differences in all determined microbiological parameters (p ≤0.05) between fresh and ripened cheese which may be attributed to different adverse conditions such as water activity, pH, salt content and temperature carried out to improve the quality of the product.

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