Relationships among the results of coagulase, staphylococcal toxin, and thermonuclease tests on staphylococci from cow milk.
نویسندگان
چکیده
Production of staphylococcal alpha- or alpha-beta-toxins correlated well with production of coagulase or thermonuclease (or both) in 203 Staphylococcus aureus isolates from milk and should be reliable indicators of S. aureus in the absence of Staphylococcus intermedius. Failures to produce toxin, tube coagulase, or thermonuclease occurred in only 1 to 2% of S. aureus. Evidence of beta- or alpha-beta-toxins was not found among 321 other staphylococci isolated from milk. A few coagulase- or thermonuclease-positive isolates not producing beta- or alpha-beta-toxins were found among the Staphylococcus hyicus isolates.
منابع مشابه
Detection of Classic Enterotoxin Genes and Coagulase Gene Typing of Staphylococcus Aureus Isolated from Raw Cow Milk in Isfahan
Background and Aims: Staphylococcus aureus (S. aureus) is considered as one of the most dangerous pathogenic bacteria due to the production of extracellular toxins. The objective of this study was to determine the prevalence of S. aureus and to characterize the recovered strains for their enterotoxin-producing genes in raw cow milk. Materials and Methods: During 9 months duration of the s...
متن کاملIdentification and biotyping of coagulase positive staphylococci (CPS) in ripened French raw milk cheeses and their in vitro ability to produce enterotoxins
Staphylococcal enterotoxins (SEs) are exoproteins which, when produced in food that is then ingested by humans, give rise to symptoms of acute gastroenteritis [2]. Several types of staphylococcal enterotoxins have been identified on a serological basis and are named SE A through U (SEA through SEU) with SEA to SEE being the most frequently encountered due to there detection by usual standard ki...
متن کاملAssociation between the enterotoxin production and presence of Coa, Nuc genes among Staphylococcus aureus isolated from various sources, in Shiraz
The present study was aimed to identify the frequency of coagulase (Coa) and thermonuclease (Nuc) genes and Staphylococcal enterotoxin A (Sea) production among Staphylococcus aureus isolated from various sources in Shiraz. Moreover, the correlation between the Sea gene and coagulase and thermonuclease enzymes is also considered. A total of 100 S. aureus were isolated from various sources includ...
متن کاملHigh incidence of enterotoxin D producing Staphylococcus spp. in Brazilian cow's raw milk and its relation with coagulase and thermonuclease enzymes.
In this study, the enterotoxigenic potential of Staphylococcus strains (n = 574) isolated from raw milk samples (n = 140) was determined for their capacity to produce staphylococcal enterotoxins. In addition, the relationship between the presence of enterotoxins, coagulase, and thermonuclease (Tnase) was assessed. The results showed that 19% of Staphylococcus was enterotoxigenic, being able to ...
متن کاملCharacteristics of staphylococci isolated from clinical and subclinical mastitis cows in Shahrekord, Iran
Staphylococci isolated from 98 mastitic cow’s milk samples were analyzed for the production of alpha,beta and delta-hemolysin on sheep, bovine and horse red blood cells and in vitro susceptibility to several antimicrobial agents. Out of a total of 18 isolated strains, 100% demonstrated hemolytic activity either alone or in combined forms. Among 8 isolates of S. aureus 3 isolates produced α/β an...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of clinical microbiology
دوره 21 4 شماره
صفحات -
تاریخ انتشار 1985