def pixel_tag(path):
    """
    Build the HTML surrounding a given image path that will be injected as a
    tracking pixel.

    :param path:
        URL path to the tracking pixel.
    :type request:
        string
    :returns:
        HTML markup for image tag.
    :rtype:
        string
    """
    return ('<img style="height:0;width:0;position:absolute;" '
            'src="%s" alt="" />' % path)