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It affects geese and Muscovy ducks. The virus is shed in the faeces and thus transmission is horizontal, via the direct faecal-oral route and also indirectly via fomites. Vertical transmission is also possible. Clinical disease only occurs in young geese and ducks between birth and 4–5 weeks of age.
Cairina moschata domestica head detail. All Muscovy ducks have long claws on their feet and a wide, flat tail. In the domestic drake (male), length is about 86 cm (34 in) and weight is 4.6–6.8 kg (10–15 lb), while the domestic hen (female) is much smaller, at 64 cm (25 in) in length and 2.7–3.6 kg (6.0–7.9 lb) in weight.
Cygnet River virus was isolated in 2010 from embryonated eggs of the Muscovy duck (Cairina moschate) from Cygnet River, Kangaroo Island in Australia. The virus was associated with an outbreak of severe disease in farmed ducks. [7]
First detected in 1978 in South Africa, the virus has spread all over the world except Australia. [4] It is mostly found in turkeys, pheasants, Muscovy ducks and guinea fowls. Turkeys are the most susceptible species for all subtypes. It is presumed that other species are immune.
Unlike geese, Muscovy ducks aren't aggressive however. In fact the opposite is true. These guys are actually quite affectionate. They're happy sitting on their owner's lap or resting by their feet.
The Muscovy is commonly reared for meat. [4]: 78 Mulards from the crossing of a Muscovy duck (Cairina moschata) and a wild-type mallard (Anas platyrhynchos)In commercial production, it is often crossed with a mallard-derived domestic duck such as the Rouen or Pekin to produce the hybrid known as a mulard.
DHBV: infects only certain duck and goose species, but does not even infect Muscovy ducks or chickens, or infects them inefficiently. [12] Heron HBV: does not infect ducks and only infects primary duck hepatocytes very inefficiently. Studies on different heron species which are geographically isolated populations suggest that lateral ...
The virus was first called Adenovirus 127 after this strain, before being named Duck adenovirus A. [4] [5] This strain was the first strain of the virus to get a full genome sequence in the GenBank database. [6] The virus was renamed Duck atadenovirus A in 2013. [citation needed]