[Isolation of Staphylococcus aureus by the Baird Parker method from powdered milk].
There are many media recommended for the isolation of Staphylococcus aureus from foods, but only with some media one can obtain a good growth started with stressed cells. The Baird Parker (BP) medium is considered the best choice to recover stressed cells, however, it is not as good a medium to isolate Staphylococcus aureus from powder milk. Therefore, it is important to count with alternative media to enhance the chance for Staphylococcus aureus to grow from dehydrated products. Thirty-one powder milk samples contaminated with Staphylococcus aureus were analysed by Baird Parker method, employing four culture media: Baird Parker (BP), Baird Parker + tween + MgCl2 (BPTM), Pork plasma with bovine fibrinogen agar (PPF) and Salt Milk agar (SL). Staphylococcus aureus was isolated in SL, 38.7%; in BP, 3.2%; in BPTM, 6.4%; and PPF, 0%.
Sánchez Mendoza
M
M
Departamento de Microbiología de la Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, México, D.F., México.
Fernández Rendón
E
E
Mota de la Garza
L
L
D000362:Agar; D000818:Animals; D001431:Bacteriological Techniques; D002417:Cattle / Q000097:blood; D003611:Dairy Products / Q000382:microbiology*; D005340:Fibrinogen; D005516:Food Microbiology; D015636:Magnesium Chloride; D008892:Milk / Q000382:microbiology*; D011136:Polysorbates; D013211:Staphylococcus aureus / Q000254:growth & development / Q000302:isolation & purification*; D013552:Swine / Q000097:blood
D011136:Polysorbates; D015636:Magnesium Chloride; D005340:Fibrinogen; D000362:Agar
Aislamiento de Staphylococcus aureus por el método de Baird Parker a partir de leche en polvo.