conditional statement for single.php targeting body class?

I am trying to create a new header in between two differtent sections that both use the single.php template. I was hoping i could target by using the body class bu t i have been unable to do that.

any idea how i can get them to differentiate??

<?php
// the page or parent page of "blog"
if ( is_single()  ) { 

   echo '<div id="callout" class="join">
        	<h3>News</h3>
       		<p>Review the navigation below to find this sections pages.</p>
      		</div>';

   echo '<div id="pic"><img src="/wp-content/themes/treadlightly/images/hdr-news.jpg" alt="News"></div>';

   // the page or parent page of "Shop"
} elseif ( is_page( '197' ) || '197' == $post->post_parent || is_page( 'single' ) ) { 

   echo '<div id="callout" class="shop">
        	<h3>Shop</h3>
       		<p>Review the navigation below to find this sections pages.</p>
      		</div>';

   echo '<div id="pic"><img src="/wp-content/themes/treadlightly/images/hdr-shop.jpg" alt="Shop"></div>';

} else {
    // the page is "Backup", or the parent of the page is "Backup"

   echo '<div id="callout" class="join">
        	<h3>Tread Lightly</h3>
       		<p>Review the navigation below to find this sections pages.</p>
      		</div>';

   echo '<div id="pic"><img src="/wp-content/themes/treadlightly/images/hdr-backup.jpg" alt="Tread Lightly"></div>';
}	

?>

Thank you!