which of the animal is a carrier of h1n1
pigs
title: Transmission and infection of H5N1 text: Transmission and infection of H5N1 Transmission and infection of H5N1 from infected avian sources to humans has been a concern since the first documented case of human infection in 1997, due to the global spread of H5N1 that constitutes a pandemic threat. Infected birds pass on H5N1 through their saliva, nasal secretions, and feces. Other birds may pick up the virus through direct contact with these excretions or when they have contact with surfaces contaminated with this material. Because migratory birds are among the carriers of the H5N1 virus it may spread to all parts of the world. Past outbreaks title: Transmission and infection of H5N1 text: Transmission and infection of H5N1 Transmission and infection of H5N1 from infected avian sources to humans has been a concern since the first documented case of human infection in 1997, due to the global spread of H5N1 that constitutes a pandemic threat. Infected birds pass on H5N1 through their saliva, nasal secretions, and feces. Other birds may pick up the virus through direct contact with these excretions or when they have contact with surfaces contaminated with this material. Because migratory birds are among the carriers of the H5N1 virus it may spread to all parts of the world. Past outbreaks title: Global spread of H5N1 text: the resulting illness, so many more than 20% of the original cat populations may have acquired H5N1." H5N1 has been transmitted in laboratories to many species including mice and ferrets to study its effects. A purposely mutated strain in ferrets has engendered a notable international policy debate regarding the openness of scientific research, the mandates of public health, and the potential for bioterrorism. H5N1 was transmitted in the wild to three civet cats in Vietnam in August 2005 and a stone marten in Germany in March 2006. The BBC reported that a stray dog in Azerbaijan died from the disease title: Influenza A virus subtype H5N1 text: genotype are increasing their pathogenicity. Birds are also able to shed the virus for longer periods of time before their death, increasing the transmissibility of the virus. Infected birds transmit H5N1 through their saliva, nasal secretions, feces and blood. Other animals may become infected with the virus through direct contact with these bodily fluids or through contact with surfaces contaminated with them. H5N1 remains infectious after over 30 days at 0 °C ( 32.0 °F) (over one month at freezing temperature) or 6 days at 37 °C ( 98.6 °F) (one week at human body temperature); at ordinary temperatures it title: H5N1 genetic structure text: "H5N1" refers to the subtypes of surface antigens present on the virus: hemagglutinin type 5 and neuraminidase type 1. Genotype Z of H5N1 is now the dominant genotype of H5N1. Genotype Z is endemic in birds in southeast Asia and represents a long term pandemic threat. Influenza A viruses have 11 genes on eight separate RNA molecules : Two of the most important RNA molecules are HA and PB1. HA creates a surface antigen that is especially important in transmissibility. PB1 creates a viral polymerase molecule that is especially important in virulence. The HA RNA molecule contains the HA gene,