diff --git a/kombu/transport/mongodb.py b/kombu/transport/mongodb.py
index 1a09d1f4..b31fce9b 100644
--- a/kombu/transport/mongodb.py
+++ b/kombu/transport/mongodb.py
@@ -15,6 +15,7 @@ from Queue import Empty
 import pymongo
 
 from pymongo import errors
+from pymongo.uri_parser import parse_uri
 from anyjson import loads, dumps
 from pymongo.connection import Connection
 
@@ -101,57 +102,42 @@ class Channel(virtual.Channel):
         See mongodb uri documentation:
         http://www.mongodb.org/display/DOCS/Connections
         """
-        conninfo = self.connection.client
+        client = self.connection.client
+        hostname = client.hostname or DEFAULT_HOST
+        authdb = dbname = client.virtual_host
 
-        dbname = None
-        hostname = None
-
-        if not conninfo.hostname:
-            conninfo.hostname = DEFAULT_HOST
-
-        for part in conninfo.hostname.split('/'):
-            if not hostname:
-                hostname = 'mongodb://' + part
-                continue
-
-            dbname = part
-            if '?' in part:
-                # In case someone is passing options
-                # to the mongodb connection. Right now
-                # it is not permitted by kombu
-                dbname, options = part.split('?')
-                hostname += '/?' + options
-
-        hostname = "%s/%s" % (
-            hostname, dbname in [None, "/"] and "admin" or dbname,
-        )
-        if not dbname or dbname == "/":
+        if dbname in ["/", None]:
             dbname = "kombu_default"
+            authdb = "admin"
 
+        if not client.userid:
+            hostname = hostname.replace('/' + client.virtual_host, '/')
+        else:
+            hostname = hostname.replace('/' + client.virtual_host,
+                                        '/' + authdb)
+
+        mongo_uri = 'mongodb://' + hostname
         # At this point we expect the hostname to be something like
         # (considering replica set form too):
         #
         #   mongodb://[username:password@]host1[:port1][,host2[:port2],
         #   ...[,hostN[:portN]]][/[?options]]
-        mongoconn = Connection(host=hostname, ssl=conninfo.ssl)
+        mongoconn = Connection(host=mongo_uri, ssl=client.ssl)
+        database = getattr(mongoconn, dbname)
+
         version = mongoconn.server_info()['version']
         if tuple(map(int, version.split('.')[:2])) < (1, 3):
             raise NotImplementedError(
                 'Kombu requires MongoDB version 1.3+, but connected to %s' % (
                     version, ))
 
-        database = getattr(mongoconn, dbname)
-
-        # This is done by the connection uri
-        # if conninfo.userid:
-        #     database.authenticate(conninfo.userid, conninfo.password)
         self.db = database
         col = database.messages
         col.ensure_index([('queue', 1), ('_id', 1)], background=True)
 
         if 'messages.broadcast' not in database.collection_names():
-            capsize = conninfo.transport_options.get(
-                'capped_queue_size') or 100000
+            capsize = (client.transport_options.get('capped_queue_size')
+                       or 100000)
             database.create_collection('messages.broadcast',
                                        size=capsize, capped=True)