Microbiologie appliquée: libre accès
Libre accès

ISSN: 2471-9315


Isolation of Cryptococcus laurentii from Mastitic Milk Samples of Cattle and Buffalo in India

Rajesh Chhabra, G Shrinet, R Yadav, J S Talukdar, N K Kakker, P Goel

Mycotic mastitis mainly caused by yeasts like Cryptococcus spp. and Candida spp. have been emerging since last decade due to several factors like indiscriminate use of antibiotics, immune suppression, corticosteroid therapy, teat injuries and faulty milking machineries. The fungus, Cryptococcus laurentii is a non-neoformans, encapsulated, basidiomycete, which was earlier considered to be saprophytic and non-pathogenic. Now it is increasingly being reported in humans, especially in the immune compromised patients. In this study, Cryptococcus laurentii was isolated and identified from mastitic milk samples of cattle and buffalo. This probably might be the first report of isolation and identification of Cryptococcus laurentii from mastitic milk samples from India to best of our knowledge. On milk culture examination, typical creamy white color colonies were appeared on Sabouraud's Dextrose agar, which on Gram’s staining gave budding yeast cells appearance. India ink staining revealed bright halo of capsules surrounding the yeast cells. All the isolates were positive forurease production and biofilm formation. Further, confirmation was done using VITEK 2 compact system (BioMerieux) which was based on their biochemical tests profiles. Molecular confirmation was done by the PCR assay. Isolation and identification of this rare fungus from milk samples in present study raises a potential threat of zoonosis.