Microbiological conditions and keeping quality of veal tongues as affected by lactic acid decontamination and vacuum packaging

• Published in: Journal of food protection Vol. 51; no. 3; pp. 208 - 213
• Main Authors: Visser, I.J.R, Koolmees, P.A, Bijker, P.G.H
• Format: Journal Article
• Language: English
• Published: Des Moines, IA International Association of Milk, Food and Environmental Sanitarians 01.03.1988
• Subjects: ACIDE LACTIQUE; ACIDO LACTICO; APTITUD PARA LA CONSERVACION; APTITUDE A LA CONSERVATION; Biological and medical sciences; CARNE DE TERNERA; EMBALAJE EN VACIO; EMBALLAGE SOUS VIDE; Food industries; Fundamental and applied biological sciences. Psychology; HIGIENE; HIGIENE DE LA CARNE; HYGIENE; HYGIENE DE LA VIANDE; KEEPING QUALITY; LACTIC ACID; LANGUE; LENGUA; Meat and meat product industries; MEAT HYGIENE; TONGUE; VACUUM PACKING; VEAL; VIANDE DE VEAU; Vertebrata; Tongue; Mammalia; Vacuum; Quality; Calf; Ox; Disinfection; Shelf life; Artiodactyla; Conditioning; Ungulata
• ISSN: 0362-028X; 1944-9097
• DOI: 10.4315/0362-028X-51.3.208

The effect of a lactic acid decontamination treatment on the microbiological condition and keeping quality of veal calf tongues was assessed. Thirty tongues were collected 45 min post mortem. Ten were washed with tap water in a centrifuge, 10 were treated with 2.0% (v/v) L-lactic acid instead of water, and 10 tongues received no treatment and served as control samples. Immediately following these treatments all tongues were vacuum-packaged, chilled 2 h in ice-water and stored at 3±1 °C and 85±5 % ERH. At 0, 14, and 28 d postmortem samples were taken for bacteriological, histobacterioscopic and sensory examination. The histobacterioscopic examination showed that the initial microflora appeared to be predominantly located under and between the papillae of the tongue surface. Centrifugation with water only did not significantly affect the bacteriological condition of tongues, although the overall appearance improved. Decontamination with lactic acid decreased mesophilic aerobic colony counts from 5.6 to 2.7 log CFU/cm . After 14 d of storage the so-called "delayed" effect of lactic acid was still observed. At that time aerobic colony counts and Enterobacteriaceae counts of controls were 6.5 and 2.8 log CFU/cm , while these counts of the lactic acid treated group were 4.0 and <1.3, respectively. Results of the bacteriological examinations were substantiated by the histobacterioscopic findings. Centrifugation with lactic acid detached superficial cells from the stratified squamous epithelium. Decontamination of tongues by centrifugation with lactic acid before vacuum packaging will increase storage life and safeguard public health.