Biochemical tests for Staphylococcus aureus: There is numerous biochemical test that we use to confirm staphylococcus auras. Some of them are; 1- Coagulase test: Principle: We use this test to distinguish positive S. auras from negative coagulase staphylococcus. Coagulase is basically an enzyme that is produced by staphylococcus aureus that transforms fibrinogen which is present in plasma into fibrin. This is one of the most important Biochemical tests for Staphylococcus aureus , the diagnosis can be confirmed by a cooperating laboratory, using the MALDI-TOF in an hour or two, and a sensitivity test can be done immediatelly, results being available by the next day - in good circumstances in total 48 hours above mentioned tests are used for confirmation of the Staphylococcus aureus. but first, you need to identify it by colony morphology then gram staining, microscopy, then catalase and oxidase test. when all of these test confirmed then apply above mentioned biochemical tests Routine use of Staphylococcus aureus rapid diagnostic test in patients with suspected ventilator-associated pneumonia The rapid diagnostic test is reliable in excluding the presence of MSSA and MRSA in the samples of patients with suspected VAP. Its utility should be regarded depending on the prevalence of MRSA
There are so many biochemical tests for Staphylococcus aureus, the well known causative agent of localized suppurative lesions. However, only a few reactions are most commonly used and are medically important for distinguishing pathogenic staphylococcus i.e. S. aureus from other non- pathogenic Staphylococci which are as follows The identification and isolation of S aureus in the medical laboratory is not too difficult as a lot of methods have been developed by scientists. One of such methods for the identification of Staphylococcus aureus is the DNase Test. This Dnase test is used to identify Staphylococcus aureus which produces deoxyribonuclease (DNase) enzymes Another very useful test for S aureus is the production of thermostable deoxyribonuclease. S aureus can be confirmed by testing colonies for agglutination with latex particles coated with immunoglobulin G and fibrinogen which bind protein A and the clumping factor, respectively, on the bacterial cell surface S. aureus is Gram positive and stains blue or purple and appears as small round cocci or short chains and most commonly as grape-like clusters. Since S. aureus may be normally present on skin and.. Coagulase test is used to differentiate Staphylococcus aureus (positive) from coagulase-negative staphylococci (CoNS). Coagulase is an enzyme produced by S. aureus that converts soluble fibrinogen in plasma to insoluble fibrin. Staphylococcus aureus produces two forms of coagulase, bound and free
. INTENDED USE The BBL™ Staphyloslide™ Latex Test is a latex slide agglutination test for the differentiation of staphylococci which possess clumping factor and/or Protein A, usually present with S taphylococcus aureus, from staphylococci that do not possess these properties. 1 II Staphylococcus aureus Antibiotic Sensitivity Test S. aureus from an infected lesion has to be cultured on a solid medium and then appropriate suspension prepared from few grown colonies. Suspension with bacteria is swabbed over a Mueller-Hinton agar ( picture 3 ), ( 15 )
iv. Mannitol salt agar (fermented by S.aureus but not most of other staphylococci) Biochemical tests: a. Catalaste positive (helps to differentiate between Staphylococcus and Streptococcus) b. Mannitol fermentation test (acid production without gas - usually by Staphylococcus aureus) c. Phosphatase test (S. aureus positive, S epidermidis negative) d Staphylococcus aureus- An Overview Staphylococcal food poisoning (SFP) | Staphylococcus aureus enterotoxins Z-test- definition, formula, examples, uses, z-test vs t-tes A standardized disinfectant test for Staphylococcus aureus cells in biofilms was developed. Two disinfectants, the membrane-active compound benzalkonium chloride (BAC) and the oxidizing agent sodium hypochlorite, were used to evaluate the biofilm test ⇒ Coagulase Test:-This test is done for distinguishing the Staphylococcus aureus from other Staphylococci which important for differentiating pathogenic strain from the non-pathogenic strains of Staphylococci. ⇒ Mannitol fermentation:-Staphylococcus aureus is the only Staphylococcus that ferments the Mannitol
A MRSA test looks for the MRSA bacteria in a sample from a wound, nostril, or other body fluid. MRSA can be treated with special, powerful antibiotics. If left untreated, a MRSA infection can lead to serious illness or death. Other names: MRSA screening, methicillin-resistant Staphylococcus aureus screening Coagulase test is done for identification of Staphylococci. Both slide and tube coagulase test has been explained in detail -Staphylococcus aureus produce yellow colonies with yellow zones (mannitol fermentor). -Other Staphylococci produce small pink or red colonies with no colour change to the medium (non-mannitol fermentor) 10. Biochemical tests - Catalase test: • Is used to differentiate between staphylococci (catalase +ve) and streptococci (catalase -ve)
Staphylococcus aureus is a facultative anaerobic Gram-positive coccus, which is non-motile, and catalase and coagulase positive. Some S. aureus strains are able to produce staphylococcal enterotoxins (SEs) and are the causative agents of staphylococcal food poisoning. Staphylococci exist in air, dust, sewage, water, milk, and food, as well as on food equipment, environmental surfaces, humans, and animals To confirm whether that bacteria is a Staphylococcus aureus we need to perform some biochemical tests. Coagulase test is one of biochemical test for Staphylo.. Methicillin-Sensitive Staphylococcus aureus or MSSA is a type of Staph that is not resistant to antibiotics that are commonly used to treat Staph infections. Why are we screening for Staph? The screening helps to prevent surgical site infections in people who carry the Staph germ. Even if your test is positive for Staph, it does not mean you have a 1 Staphylococcus aureus Staphylococcus aureus is a bacterium that causes staphylococcal food poisoning, a form of gastroenteritis with rapid onset of symptoms. S. aureus is commonly found in the environment (soil, water and air) and is also found in the nose and on the skin of humans Optimal Result: 0 - 499 Units. What does it mean if your Staphylococcus aureus result is too high? Gram-positive bacteria in the Firmicutes phylum. High levels may result from reduced digestive capacity, and intestinal inflammatory activity
Mannitol Salt Agar (MSA) is used as a selective and differential medium for the isolation and identification of Staphylococcus aureus from clinical and non-clinical specimens. It encourages the growth of a group of certain bacteria while inhibiting the growth of others Staphylococcus aureus. Staphylococcus aureus on Columbia agar with 5% defibrinated sheep blood (Bio-Rad™). Individual colonies on agar are round, convex, and 1-4 mm in diameter with a sharp border.On blood agar plates, colonies of Staphylococcus aureus are frequently surrounded by zones of clear beta-hemolysis.The golden appearance of colonies of some strains is the etymological root of the. Staphylococcus aureus is a Gram-positive, round-shaped bacterium, a member of the Firmicutes, and is a usual member of the microbiota of the body, frequently found in the upper respiratory tract and on the skin.It is often positive for catalase and nitrate reduction and is a facultative anaerobe that can grow without the need for oxygen. Although S. aureus usually acts as a commensal of the.
This test is performed on Gram-positive, catalase positive species to identify the coagulase positive Staphylococcus aureus. Coagulase is a virulence factor of S. aureus. The formation of clot around an infection caused by this bacteria likely protects it from phagocytosis Also asked, is Staph aureus urease positive? Specifically, the urea test was positive, the H 2 S test was positive, and the indole test was positive.In conclusion, the gram positive bacterium was Staphylococcus aureus, and the gram negative bacterium was Proteus vulgaris.. Also Know, what tests are used to identify Staphylococcus aureus
Using herd test milk samples, the staph aureus test can be a convenient way of identifying whether subclinical staph aureus is a problem in a herd. It can enable more informed decisions for dry cow treatment vs culling as part of an overall mastitis management plan. About Staphylococcus aureus Staphylococcus aureus (S. aureus, staph) is a bacterium that frequently lives on the human skin without causing illness. However, if there is a break in the skin from a wound or surgery, or if a person's immune system is weakened, then S. aureus can cause an infection. Lab tests can help diagnose a staph infection Na PM testu na farmě naroste Staphylococcus aureus do druhého dne, spolupracující laboratoř může ještě diagnózu potvrdit - za využití přístroje MALDI TOF trvá proces asi hodinu až dvě, a ihned lze udělat vyšetření citlivosti, jejíž výsledek máme do dalšího dne - když to dobře jde: celkem 48 hodin Staphylococcus aureus? 2. Describe the selective and/or differential properties of SM110 agar, mannitol salt agar (MSA) and m‐staph broth for the isolation and identification of staphylococci. 3. What is the role of α‐toxin in the pathogenesis of S. aureus? 4 Staphylococcus aureus or staph infections may cause disease because of direct infection or due to the production of toxins by the bacteria. Food poisoning, boils, cellulitis, impetigo, and toxic shock syndrome are some examples of diseases that can be caused by Staph bacteria
Staphylococcus aureus is a Gram-positive, coagulase-positive, catalase-positive, non-motile coccus found in the genus Staphylococcus and family Staphylococcaceae. They are facultative anaerobic organisms, and they cause haemolysis on blood agar. Staphylococcus species are usually arranged in groups, in pairs, as well as in tetrads.They can also occur singly or as single cells Staphylococcus aureus Electron micrograph from Visuals Unlimited, The test is performed by adding 3% hydrogen peroxide to a colony on an agar plate or slant. Catalase-positive cultures produce O 2 and bubble at once. The test should not be done on blood agar because blood itself contains catalase . 2 - Primarily used to detect carriage of Staphylococcus aureus. Recovery of s. aureus from a site does not necessarily indicate infection. Screening allows identification of potential sources from which this organism can be transmitted to other individuals. Results will also indicate if the isolate is a methicillin resistant strain (MRSA) Becker K, Denis O, Roisin S, Mellmann A, Idelevich EA, Knaack D, van Alen S, Kriegeskorte A, Köck R, Schaumburg F, Peters G, and Ballhausen B. 2016. Detection of mecA- and mecC-positive methicillin-resistant Staphylococcus aureus (MRSA) isolates by the new Xpert MRSA Gen 3 PCR assay. J Clin Microbiol54:180-184
Why Staphylococcus aureus Multi drug resistant? Confirmatory test of streptococcal pneumonia: What type genus of bacteria the following characteristic? grame (+) cocci Catalase (+) Coagulase (+ Staphylococcus Aureus on Mannitol Salt Agar 3-Tryptic Soy Agar. Tryptic Soy Agar is a growth media for different bacteria. It is a non-selective media which provide enough nutrients to allow a wide variety of microorganisms. Staphylococcus show convex and circular colonies on this agar. Staphylococcus Aureus on Tryptic Soy Agar 4- Biochemical Test Staphylococcus aureus (staph or golden staph) is a germ that commonly lives on the skin or in the nose or mouth. Read more on WA Health website Methicillin resistant Staphylococcus aureus screening - Lab Tests Online A
Staphylococcus aureus • Gram positive cocci • Arranged in grape like clusters • Cluster formation is d/t division in 3 planes and daughter cells remain in close proximity • May appear in singles, pairs or short chains • Some bacteria may have capsules Urease test 21 Staphylococcus aureus and Escherichia coli were enumerated and isolated from ready-to-eat vegetables salad and meat luncheon on their selective media (Baird-parker and Macconkey agar, respectively). Twenty suspicious colonies of each (10 from each product) were randomly chosen and identified using conventional based on morphological and physiological characteristics
Staphylococcus aureus is a common human pathogen which. can be capable of pro ducing a wide variety of diseases starting. from skin and soft tissue infection to life threatening. endocarditis. The coagulase test The single most important test used to distinguish S.aureus from other staphylococci demonstrates production of coagulase.S.aureus produces two forms of coagulase.Bound coagulase, otherwise known as clumping factor, can be detected by carrying out a slide coagulase test, and free coagulase can be detected using a tube coagulase test
Wolk DM, Picton E, Johnson D, et al. Multicenter evaluation of the Cepheid Xpert methicillin-resistant Staphylococcus aureus (MRSA) test as a rapid screening method for detection of MRSA in nares. J Clin Microbiol 2009; 47:758. Levi K, Towner KJ MRSA is a type of bacteria that's resistant to several widely used antibiotics. This means infections with MRSA can be harder to treat than other bacterial infections. The full name of MRSA is methicillin-resistant Staphylococcus aureus. You might have heard it called a superbug. MRSA infections mainly affect people who are staying in hospital Staphylococcus aureus bacteria are pathogens to both man and other mammals. They are gram positive bacteria that are small round in shape (cocci) and occur as clusters appearing like a bunch of.
staphylococcus aureus is a very complex disease and most problematic bacteria apart from being contracted sexually or as a toilet infection. It destroys the immune system thereby leading to numerous damages and symptoms in the human body. Seriously, about 45 to 65 per cent of people are carrying staphylococcus aureus INTRODUCTION. Staphylococcus aureus is a leading cause of community-acquired and hospital-acquired bacteremia. Patients with S. aureus bacteremia can develop a broad array of complications that may be difficult to recognize initially and can increase morbidity. Mortality rates of 20 to 40 percent have been described .Mortality appears to be higher with methicillin-resistant S. aureus (MRSA. The ideal identification of Staphylococcus aureus clinical isolates requires a battery of tests and this is costly in resource limited settings. In many developing countries, the tube coagulase test is usually confirmatory for S. aureus and is routinely done using either human or sheep plasma. This study evaluated Mannitol salt agar and the deoxyribonuclease (DNase) test for improving the. Culture for isolation of Staphylococcus aureus and drug susceptibility testing (additional charge) Special Instructions This test is intended for screening for MRSA/MSSA colonization only and is not intended to diagnose MRSA/MSSA infection
Testing by VITEK 2 of the Tel Aviv, 64239, Israel e-mail: firstname.lastname@example.org colonies grown on the screening agar and within the zone Tel.: +972-64-266800 of inhibition on the E test agar plate confirmed them to be Fax: +972-3-6974996 Staphylococcus aureus, and revealed an antimicrobial 349 Fig. 1 Agar-based oxacillin susceptibility testing. a. Le dernier rapport d'étude de marché largement répandu Test de Staphylococcus Aureus examine divers éléments d'intensité, importants et inductifs qui décrivent le marché et l'entreprise. Chacune des constatations, des données et des données du registre a montré et revalidé l'utilisation de sources professionnelles Treatment of Staphylococcus aureus i nfection Localized infections are managed by incision and drainage while antibiotic therapy is indicated for systemic infections. Oral therapy can include trimethoprim-sulfamethoxazole, doxycycline or minocycline, clindamycin, or linezolid; vancomycin is the drug of choice for intravenous therapy, with. The key difference between epidermidis and aureus is that Staphylococcus epidermidis is a non-haemolytic bacterium while Staphylococcus aureus is a haemolytic bacterium.. Epidermidis and aureus are species names of two bacteria in the bacterial genus Staphylococcus. They cause the most common medical device-mediated infections What is being tested? These tests detect the presence of methicillin resistant Staphylococcus aureus (MRSA).MRSA are strains of Staphylococcus aureus bacteria, sometimes called golden staph, which are resistant to all of the ß lactam class of antibiotics such as flucloxacillin and cephalexin.These antibiotics are commonly used to treat infections caused by Staphylococcus aureus
The assay is a qualitative test designed for the rapid detection of methicillin-resistant Staphylococcus aureus (MRSA) directly from nares swabs. This novel test combines integrated nucleic acid extraction and automated real-time PCR for the detection of a MRSA-specific signature sequence Out of the unknown choices, it was between Staphylococcus aureus and Staphylococcus epidermis. The lab instructor helped to narrow down the remaining bacterium to S. aureus. The bacterium should have been negative for urease and positive for mannitol. A urea broth test identified the gram negative bacterium as Proteus vulgaris. The Kligler Iron. This indicated that the unknown was Staphylococcus aureus or Enterococcus faecalis. Then a Nitrate test was performed which had a positive reaction meaning the reduction of Nitrate to Nitrite. A Catalase test was performed which had a positive reaction for the bacterial enzyme catalase. This proved that the unknown-2 bacteria were. Staphylococcus aureus. Conclusion: Coagulase test can replace the standard gold test for the detection of Staphylococcus aureus. In case of doubt, the bacteriological characteristics and the factors associated with Staphylococcal infections may be helpful in the diagnosis of Staphylococcus aureus infection
Abstract. Objectives: To evaluate the usefulness of cefoxitin when used as a surrogate marker for the detection of methicillin resistance.. Patients and methods: Eight hundred and seventy-one strains of Staphylococcus aureus, collected from eight tertiary referral centres serving diverse socio-economic populations, were included in the study using NCCLS disc diffusion and the agar dilution. Staphylococcus aureus is highly vulnerable to destruction by heat treatment and nearly all sanitizing agents. Therefore, the presence of this bacterium or its enterotoxins in processed foods or on food processing equipment is generally an indication of poor sanitation Methicillin-resistant Staphylococcus aureus (MRSA) are strains of Staphylococcus aureus, or staph, bacteria that are resistant to the antibiotic methicillin as well as to related beta-lactam antibiotics, such as oxacillin, penicillin, amoxicillin, and cephalosporins, that are used to treat ordinary staph infections.MRSA testing detects the presence of MRSA in a patient's sample
Staphylococcus aureus is a pathogenic bacterial species that is generally found on the skin, mucous membranes and nasal passages in abundance. An injury to the aforementioned sites enables these agents to produce an infection. S. aureus is mainly responsible for food poisonings and suppurative infections but is also one of the major causative agents of nosocomial infections The prevalence of positive culture for methicillin-resistant Staphylococcus aureus is less than 2% in the lower respiratory tract secretions of patients with suspected ventilator-associated pneumonia. The negative predictive value of a rapid diagnostic test aiming at identifying Staphylococcus aureus in bronchial secretions is excellent Screening for Staphylococcus aureus before Your Surgery Staphylococcus aureus or Staph is a germ that lives on the skin and in the noses of many healthy people. Staph germs do not cause any problems for most people, but sometimes these germs can cause serious infections including surgical wound infections. There are two main kinds of Staph
S. aureus: Type: Staphylococcus aureus Test Kit: Contents & storage. This kit contains Target Assay Mix (store at -20°C in the dark), a Negative Control (store at -2 to 8°C), and 2X Environmental Master Mix (store at -2 to 8°C). There are enough reagents for 100 assays. These reagents are stable for one year after shipment Abstract. When Staphylococcus aureus is the cause of ventilator-associated pneumonia or a bacterial infection following influenza, the infections are devastating if not treated promptly. Disease due to methicillin-resistant S. aureus (MRSA) continues to be of concern throughout most of the United States. Currently, the U.S. Food and Drug Administration (FDA) has cleared polymerase chain.
Rapidly detect Staphylococcus aureus in food and environmental samples with the Thermo Scientific™ SureTect™ Staphylococcus aureus PCR Assay.The assay incorporates an optimized liquid lysis step, providing a quick and simple method for preparing the sample for rapid detection on the Applied Biosystems™7500 Fast Food Safety Real-Time PCR Systems or Applied Biosystems™ QuantStudio™ 5. Test includes: The direct detection of nasal colonization by methicillin-sensitive S. aureus (MSSA) staphylococcal protein (spa) gene and/or methicillin-resistant S. aureus (MRSA) Staphylococcus chromosomal cassette (SCC) gene targets to aid in the prevention and control of MSSA and MRSA infections in healthcare settings. Methodology 2 2 Staphylococcus is a general name for a class of small, round bacteria capable of causing mastitis (inflammation of the udder) in dairy cows. There are a number of primary species of staphylococci.Among these is Staphylococcus aureus, also referred to as Staph. aureus or staph.Staph. aureus is a major cause of chronic or recurring clinical mastitis in dair PASTOREX Staph Plus Kit is a rapid agglutination test on slides for the identification of coagulase positive Staphilococci isolated on selective agar plates. It is effective also on Staphilococcus strains expressing low level of coagulase activity. In fact, PASTOREX Staph Plus permits simultaneous detection of: fibrinogen-affinity factor (known. Staphylococcus Aureus screening is the mandatory screening test prior to taking insulin and growing awareness of bacterial infection across the globe is expected to push the market growth. Advanced rapid diagnostic tests availability also boost the growth of Staphylococcus Aureus Testing Market over the forecast period
Methicillin Resistant Staphylococcus aureus (MRSA) by PCR, Nasal Feedback I want to provide feedback regarding - Select - Missing or Incorrect Test Information Test Research Assistance Other Test Content Questions Pricing and Availability General Usability of Test Directory Look and Feel of Test Directory Request a New Feature in Test Director Diagnosis and Treatment of Staphylococcus aureus. S. aureus is part of the normal human flora (bacteria that normally reside in or on humans) and does not usually cause infection. When bacteria are living on or in the human body, but are not causing infection, it is called colonization
Staphylococcus aureus bacteria are gram-positive cocci that cause diseases of varying severity, from skin and soft-tissue infections (eg, folliculitis, impetigo, cellulitis, abscesses) to deep-seated infections (eg, endocarditis, osteomyelitis). Laboratory studies used in the diagnosis generally include culture and serum antibody testing A staphylococcus epidermidis gram stain test is a biological procedure wherein microorganisms are stained in order to identify and differentiate between them. Crystal violet, iodine solution, and ethanol are used in this procedure, and those bacteria which retain the stain are referred to as gram positive, while others are referred to as gram. Therefore, some biochemical tests have to be performed to verify that the bacteria isolated is in the genus of Staphylococcus and it is of the species Staphylococcus aureus. The catalase, Hugh and Leifson's oxidation fermentation and cogulase tests are regarded as the standard tests for identification of Staphylococcus aureus (18)
MSSA, or methicillin-susceptible Staphylococcus aureus, is an infection caused by a type of bacteria commonly found on the skin.You might have heard it called a staph infection. Treatment for. Abstract. Staphylococcus aureus is a bacterium that can cause a variety of illnesses through suppurative or nonsuppurative (toxin-mediated) means.S aureus is a common cause of skin and skin structure infections as well as osteoarticular infections in the pediatric population.S aureus is also identified in cases of septicemia, infective endocarditis, pneumonia, ocular infections, and central. Staphylococcus aureus is facultative anaerobic gram-positive cocci which occur singly, in pairs, and irregulular clusters. S. aureus is nonmotile, non-spore forming, catalase and coagulase positive. Typical colonies are yellow to golden yellow in color, smooth, entire, slightly raised, and hemolytic on 5% sheep blood agar cation of S. aureus with coagulase tests. Although coagulase tests are invaluable for identification of Staphylococcus aureus, few studies have evaluated their use in routine practice . In addition, diagnostic labora-tories are occasionally faced with organisms with biochem-ical characteristics that do not fit into the patterns of The catalase test with Staphylococcus aureus. Staphylococcus aureus (and other Staphylococcus spp.) is (unlike e.g., Streptococcus spp.) catalase positive. Columbia agar with sheep blood, 24 hours, aerobic atmosphere, 37°C. The presence of catalase in a microbial or tissue sample can be tested by adding a volume of hydrogen peroxide and observing the reaction
Abstract . Staphylococcus aureus, a major gram positive bacterial pathogen that causes a wide spectrum of clinical infections, ranging from localized soft-tissue infections to life-threatening bacteremia and endocarditis.S. aureus infects tissues when the skin or mucosal barriers have been breached which leads to many different types of infections, including boils, carbuncles (a collection of. Staphylococcus aureus Test de Catalasa #microbiologia #microbios #patogenos #foodsafety #segurancadosalimentos #inocuidad #globalf Analysis Description: The Petrifilm Staph Express Count Plate is a sample-ready culture medium system which contains a cold-water-soluble gelling agent. The chromogenic, modified Baird-Paker medium in the plate is selective and differential for Staphylococcus aureus.. The sample is diluted with a buffer, blended, and an extracted amount is plated on the Petrifilm, many times in a serial. Staphylococcus aureus was identified by growth on mannitol salt agar (MSA), and MRSA by growth on mannitol salt agar containing 4 μg Oxacillin, Gram staining, and conventional biochemical test. Isolates of S. aureus were characterized by antibiotic susceptibility testing using the disc diffusion method Staphylococcus aureus is historically regarded as a non-motile organism. More recently it has been shown that S. aureus can passively move across agar surfaces in a process called spreading. We re.
Staph (pronounced staff) is short for Staphylococcus. Staph is a type of germ (bacteria) that can cause infections almost anywhere in the body. One type of staph germ, called methicillin-resistant Staphylococcus aureus (MRSA), is harder to treat. This is because MRSA is not killed by certain medicines (antibiotics) used to treat other staph germs Test Details Use MRSA by NAA is a qualitative in vitro diagnostic test for the direct detection of nasal colonization by methicillin-resistant Staphylococcus aureus (MRSA) to aid in the prevention and control of MRSA infections in health care settings Abstract We evaluated the utility of 2 methods for detection of methicillin-resistant Staphylococcus aureus [MRSA]directly from signal-positive blood culture bottles: loop-mediated isothermal amplification [LAMP]assay, and direct cefoxitin disk diffusion [DCDD]test using a 30 microg cefoxitin disk.In parallel, standard microbiological identification and oxacillin. The tube coagulase test demonstrated 91·5% accuracy, 88·5% sensitivity and 100% specificity for the direct recognition of Staph. aureus in milk samples from quarters with subclinical mastitis. Staphylococcus aureus is een bacterie die bij veel mensen voorkomt, vooral op de huid en in de neus. De bacterie veroorzaakt normaal gesproken geen ziekte, maar bij beschadiging van huid of slijmvliezen kunnen infecties ontstaan. Ook bij dieren komt de bacterie voor