2.7. Safety evaluation of L. amylovorus CRL 887 using an animal model
L. amylovorus CRL887 was grown in MRS broth during 16 h at 37 °C.
The culture was centrifuged (6000g, 5 min), and the pellet was washed
twice with 0.1% (w/v) peptone solution and suspended in reconstituted
skim milk before being administered to mice.
Twenty BALB/c mice of 6 weeks of age, weighing 25–30 g, were
obtained from the closed inbred colony, maintained (12-h light cycle,
22 ± 2 °C) at CERELA-CONICET (Tucumán, Argentina) and were fed
ad libitum with water and balanced rodent diet (Cooperación,
Argentina; containing 32% protein, 5% fat, 2% fiber, and 60% nitrogenfree
extract). The mice were separated into two groups: the experimental
group that received the L. amylovorus strain and the control group
that did not receive bacterial supplementation.
L. amylovorus CRL887 was given to the mice at a concentration of
1 × 109 CFU LAB/day/animal in the drinking water during 7 days. The
control group consisted of mice that received 10% non-fat milk under
the same conditions as the test group. All mice were fed with conventional
balanced diet ad libitum.
Animal growth (live weight), food, and water intake were determined
on a bi-daily basis. All animal protocols were pre-approved by
the Animal Protection Committee of CERELA (CRL-BIOT-LT-20142A)
and followed the latest recommendations of the Federation of
European Laboratory Animal Science Associations and the Asociación
Argentina para la Ciencia y Tecnología de Animales de Laboratorio. All
experiments comply with the current laws of Argentina.
2.7. Safety evaluation of L. amylovorus CRL 887 using an animal modelL. amylovorus CRL887 was grown in MRS broth during 16 h at 37 °C.The culture was centrifuged (6000g, 5 min), and the pellet was washedtwice with 0.1% (w/v) peptone solution and suspended in reconstitutedskim milk before being administered to mice.Twenty BALB/c mice of 6 weeks of age, weighing 25–30 g, wereobtained from the closed inbred colony, maintained (12-h light cycle,22 ± 2 °C) at CERELA-CONICET (Tucumán, Argentina) and were fedad libitum with water and balanced rodent diet (Cooperación,Argentina; containing 32% protein, 5% fat, 2% fiber, and 60% nitrogenfreeextract). The mice were separated into two groups: the experimentalgroup that received the L. amylovorus strain and the control groupthat did not receive bacterial supplementation.L. amylovorus CRL887 was given to the mice at a concentration of1 × 109 CFU LAB/day/animal in the drinking water during 7 days. Thecontrol group consisted of mice that received 10% non-fat milk underthe same conditions as the test group. All mice were fed with conventionalbalanced diet ad libitum.Animal growth (live weight), food, and water intake were determinedon a bi-daily basis. All animal protocols were pre-approved bythe Animal Protection Committee of CERELA (CRL-BIOT-LT-20142A)and followed the latest recommendations of the Federation ofEuropean Laboratory Animal Science Associations and the AsociaciónArgentina para la Ciencia y Tecnología de Animales de Laboratorio. Allexperiments comply with the current laws of Argentina.
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2.7 . การประเมินความปลอดภัยของ L . amylovorus CRL จะใช้รูปแบบ
สัตว์ . amylovorus crl887 ปลูกใน MRS broth ระหว่าง 16 ชั่วโมง 37 ° C .
( 6000g วัฒนธรรมระดับ 5 นาที ) , และเม็ดล้าง
สองครั้งกับ 0.1% ( w / v ) และสามารถแขวนลอยอยู่ในสารละลายตามลำดับ
หางกะทิก่อน มีการบริหารจัดการให้หนู หนูสายพันธุ์ Balb / C
ยี่สิบของอายุ 6 สัปดาห์ น้ำหนัก 25 – 30 g ,
ที่ได้รับจากอาณานิคมผสมปิด รักษา ( 12-h แสงวงจร
22 ± 2 ° C ) cerela-conicet ( argentina . kgm , อาร์เจนตินา ) และได้รับ
อย่างเต็มที่ด้วยน้ำและอาหารสัตว์ฟันแทะที่สมดุล ( cooperaci เลออง
, อาร์เจนตินา ; โปรตีน 32 % 5 % ไขมัน , ไฟเบอร์ , 2% และ 60 nitrogenfree
% สารสกัด ) หนูได้แยกออกเป็นสองกลุ่ม กลุ่มที่ได้รับการทดลอง
L
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