To Vibrio parahaemolyticus σε τροφιμογενείς λοιμώξεις αλιευμάτων


Δημοσιευμένα: Dec 15, 2017
N. SOLOMAKOS (Ν. ΣΟΛΩΜΑΚΟΣ)
A. PEXARA (Α. ΠΕΞΑΡΑ)
A. GOVARIS (Α. ΓΚΟΒΑΡΗΣ)
Περίληψη

Μέχρι σήμερα έχουν καταγραφεί 30 είδη Vibrio (δονάκια), από τα οποία 13 είναι παθογόνα για τον άνθρωπο. Όλα τα παθογόνα δονάκια έχουν αναφερθεί ότι σχετίζονται μκ τροφιμογενείς λοιμώξεις, αλλά το V. parahaemolyticus είναι το σημαντικότερο παθογόνο δονάκιο. Το V. parahaemolyticus είναι  ένα αλλόφιλο βακτήριο που βρίσκεται σε υδάτινα
οικοσυστήματα σε όλη την υφήλιο. Μέχρι το 1996, το παθογόνο σχετίζονταν με σποραδικά περιστατικά τροφιμογενούς γαστρεντερίτιδας μετά από την κατανάλωση νωπών αλιευμάτων ή αλιευμάτων που είχαν υποστεί ατελή θερμική επεξεργασία.

Από το 1996, ο αριθμός των καταγεγραμμένων τροφιμογενών λοιμώξεων από το V. parahaemolyticus έχει αυξηθεί σημαντικά με αποτέλεσμα να αποτελεί το κυριότερο αίτιο τροφιμογενών λοιμώξεων από κατανάλωση αλιευμάτων σε ορισμένες ασιατικές χώρες και στις ΗΠΑ. Η αύξηση αυτή αποδίδεται στην εμφάνιση του ορότυπου 03:Κ6 του βακτηρίου. Τα παθογόνα στελέχη του V. parahaemolyticus παράγουν μια θερμοανθεκτική τοξίνη (Kanagawa ή Tüll) ή μια αιμολυσίνη παρόμοια με την τοξίνη Kanagawa (TRI 1) που σχετίζονται με τα γονίδια tdh και trh, αντίστοιχα.

Το V. parahaemolyticus  δεν περιλαμβάνεται στα μικροβιολογικά κριτήρια ασφαλείας για τα αλιεύματα που ισχύουν στην Ευρωπαϊκή Ένωση, αφού μέχρι πρόσφατα θεωρούνταν χαμηλή η συχνότητα εμφάνισης λοιμώξεων από το παθογόνο στην Ευρώπη. Όμως, οι κλιματικές αλλαγές του πλανήτη μας ευνοούν την ανάπτυξη του παθογόνου στο θαλάσσιο νερό, Πρόσφατες μελέτες στην Ισπανία και τη Γαλλία αναφέρουν ότι οι λοιμώξεις αυτές παρουσιάζουν σημαντική αύξηση, Στη παρούσα ανασκόπηση αναφέρονται οι μεγαλύτερες επιδημίες που έχουν προκληθεί παγκοσμίως από Κ parahaemolytìcus μετά από την κατανάλωση αλιευμάτων.

Η αυξανόμενη καταγραφή της παρουσίας του παθογόνου σε αλιεύματα στην Ευρώπη παρουσιάζει ιδιαίτερη σημασία για τη Δημόσια Υγεία και υπογραμμίζει την ανάγκη ένταξης του V. parahaemolytìcus στα προγράμματα επιτήρησης και έλεγχου.

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