* prior to the capture of fish
- Mycobacterium piscium. Manifested by bumps that look like
tubers, which appear in the spleen, kidneys, liver and skeleton of some fish.
- Collogenes bacillus, which causes hemorrhagic exophthalmia.
Some other external cause injury induce internal changes.
- Disease limfoquística.apareixen nodules scattered throughout the body. It affects a large number of species, both marine and Aiguadolç.
- Infectious nephritis trout, which is manifested by anemia and liver degeneration
Protozoan diseases - due to diseases that typically affect Trypanosomas eels and rays .- Diseases caused by Emirias, common sardine and mackerel .- Amebas illness occurring in salmonids.
Diseases metazoans. important. capable of causing zoonotic diseases to
people. The most common are: - tennis. The Diphyllobotrium latum - Larvae of Anisakis, common in the entrails of some fish in which this might not cause disease, however some people have allergies to these larvae.
Fungal diseases. Sweet aprolegia s pollution that affects the skin, eyes and gills of carp. In marine species such as mackerel or herring are pollution Ichthyosporidium Hofer. * Alterations after the capture of fish
at the same time the animal is caught 1) biochemical changes: responsible for the appearance of rigor mortis and the partial Micromorphology disintegration of the muscle. thru appear
changes in proteins and lipids.
2) organoleptic changes: changes in color: the oxidation of carotenoids produces skin tones grogueses, red, orange or descoloracions. The color black -> melanin. oxidation in muscle cromoproteïnes -> gray and brown.
softening and loss of elasticity -> activity and endogenous protein in bacteria. estranyesc smells -> volatile substances (trimethylamine, ammonia, hydrogen sulfide)
cold waters: Pseudomonas, Alteromonas, Acinetobacter, Escherichia, Proteus, Serratia warm waters ... g + Micrococcus, and Corinebacterium bacilli. The presence of pathogens is
typical of fish from coastal regions little healthy: E Clostridium botulinum, Salmonella, Shigella and fecal parasites and viruses.
psicròtrofa -5 ° C.
Clostridium botulinum type E. 80 ° C for 20 minutes destroys the spores and a pH below 5.3 inhibited multiplication and toxinogènesi. Vibrio parahaemolyticus (Gastroenteritis.