Loading…

Isolation and characterization of Staphylococcus aureus and methicillin-resistant Staphylococcus aureus (MRSA) from milk of dairy goats under low-input farm management in Greece

•S. aureus (29 %) & MRSA (1.6 %) were detected in subclinical mastitis goat milk samples.•3 spa types were identified in MRSA with t7947 reported for the first time in GR.•Most isolates (S. aureus or MRSA) possessed moderate biofilm-formation ability.•S. aureus isolates were very closely related...

Full description

Saved in:
Bibliographic Details
Published in:Veterinary microbiology 2020-08, Vol.247, p.108749-108749, Article 108749
Main Authors: Angelidis, Apostolos S., Komodromos, Dimitrios, Giannakou, Rebecca, Arsenos, Georgios, Gelasakis, Athanasios I., Kyritsi, Maria, Filioussis, George, Hadjichristodoulou, Christos, Torounidou, Pavlina, Papa, Anna, Sergelidis, Daniel
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•S. aureus (29 %) & MRSA (1.6 %) were detected in subclinical mastitis goat milk samples.•3 spa types were identified in MRSA with t7947 reported for the first time in GR.•Most isolates (S. aureus or MRSA) possessed moderate biofilm-formation ability.•S. aureus isolates were very closely related even among farms of distant regions. The presence of Staphylococcus aureus and methicillin-resistant S. aureus (MRSA) in raw milk is a challenge for veterinarians and public health professionals. In this study, we investigated the presence and clonality of S. aureus and MRSA in milk of individual dairy goats with subclinical mastitis reared under the low-input farming system in Greece and determined the isolates’ enterotoxin gene carriage and their ability to form biofilms. S. aureus was isolated from 162 out of the 559 milk samples examined (29 %) and one isolate per S. aureus-positive sample was further characterized. S. aureus isolates were very closely related even among farms of distant geographical regions. Nine S. aureus isolates carried a functional mecA gene and were classified as MRSA. The S. aureus protein A (spa) typing in the MRSA isolates showed that four belonged to spa type t127 (44.4 %), three to t2049 (33.3 %) and two to t7947 (22.2 %). The spa type t7947 is reported for the first time in Greece. The MRSA isolates originated from two very distantly located farms, one located in the island of Skopelos and the other in Central Macedonia. Four of the MRSA isolates carried the staphylococcal enterotoxin genes sea or sec. Most of the isolates (92 % of S. aureus and 77.8 % of the MRSA) possessed moderate or weak biofilm-formation ability. Raw milk from low-input goat herds may serve as a potential vector of antimicrobial-resistant S. aureus to raw-milk consumers.
ISSN:0378-1135
1873-2542
DOI:10.1016/j.vetmic.2020.108749