Id |
Subject |
Object |
Predicate |
Lexical cue |
T88 |
0-4 |
Sentence |
denotes |
3.1. |
T89 |
5-41 |
Sentence |
denotes |
Influenza Viruses in Swine in Africa |
T90 |
43-49 |
Sentence |
denotes |
3.1.1. |
T91 |
50-58 |
Sentence |
denotes |
Cameroon |
T92 |
59-169 |
Sentence |
denotes |
The first report of IAV in Cameroonian swine appeared when A(H1N1)pdm09 virus was documented during 2009–2010. |
T93 |
170-291 |
Sentence |
denotes |
The youngest infected swine was four-month old which suggested that A(H1N1)pdm09 virus can infect the young piglets [51]. |
T94 |
292-407 |
Sentence |
denotes |
Nine more swine herds in Cameroon were found infected with A(H1N1)pdm09 and H1N1 viruses during May–June 2011 [52]. |
T95 |
408-625 |
Sentence |
denotes |
A multiple-site study including free-roaming and penned swine along with domestic poultry and Columbiformes birds between December 2009 and August 2012 identified one IAV positive swine at each of the two study sites. |
T96 |
626-726 |
Sentence |
denotes |
The inter-species transmission of IAV was ruled out as all the birds were negative for the IAV [53]. |
T97 |
728-734 |
Sentence |
denotes |
3.1.2. |
T98 |
735-742 |
Sentence |
denotes |
Nigeria |
T99 |
743-924 |
Sentence |
denotes |
The first evidence of the past IAV infection in Nigerian swine appeared in 2008 when H1N1 and H3N2 virus antibodies were detected in swine sampled at three different locations [54]. |
T100 |
925-1090 |
Sentence |
denotes |
Shortly after that, in 2009, the first report of A(H1N1)pdm09 virus appeared in the Nigerian swine when one swine herd was found seropositive for A(H1N1)pdm09 virus. |
T101 |
1091-1230 |
Sentence |
denotes |
Interestingly, eight other swine herds were found seropositive for the H1N1 and four herds were found positive for human-like H3N2 viruses. |
T102 |
1231-1404 |
Sentence |
denotes |
The seroprevalence of IAV further increased as 66 swine herds were detected positive for A(H1N1)pdm09 virus and 53 herds were found seropositive for H1N1 virus in 2012 [52]. |
T103 |
1405-1604 |
Sentence |
denotes |
The active infection (viral RNA) of A(H1N1)pdm09 virus was first reported in the Nigerian swine between July 2010–June 2012 when 18 A(H1N1)pdm09 virus isolates were retrieved from the swine in Lagos. |
T104 |
1605-1767 |
Sentence |
denotes |
The zoonotic transmission of A(H1N1)pdm09 virus to the exposed human workers was ruled out as all the human samples were negative for the A(H1N1)pdm09 virus [55]. |
T105 |
1768-1890 |
Sentence |
denotes |
Nineteen more A(H1N1)pdm09 and five human-origin H3N2 viruses were identified in the Nigerian swine during 2013-2015 [56]. |
T106 |
1891-1999 |
Sentence |
denotes |
Later one more report of the human strain of H3N2 virus appeared in swine during January–February 2014 [57]. |
T107 |
2000-2075 |
Sentence |
denotes |
A high seroprevalence of IAV in a commercial piggery was reported in Lagos. |
T108 |
2076-2340 |
Sentence |
denotes |
Total 197 human and 281 swine sera samples were screened which determined that 87% human and 67% swine sera had antibodies for IAV depicting the past exposure [58] but the active infection was absent given that all nasal swabs were negative for IAV infection [58]. |
T109 |
2341-2635 |
Sentence |
denotes |
Lately, highly pathogenic avian influenza virus (HPAIV) strain H5N1 was detected in 22 swine samples between December 2015 and February 2016 during an ongoing H5N1 disease outbreak in Nigerian poultry [59] which indicated the inter-species transmission of H5N1 virus from poultry to swine [59]. |
T110 |
2637-2643 |
Sentence |
denotes |
3.1.3. |
T111 |
2644-2649 |
Sentence |
denotes |
Egypt |
T112 |
2650-2968 |
Sentence |
denotes |
A molecular study reported the negative prevalence of avian-like H5N1 and H5N2 viruses in Egyptian swine in May 2008 [60] but the serological investigation identified H5N1 virus antibodies in seven and H5N2 virus antibodies in four swine sera samples [60] which suggested a past exposure of these swine to the viruses. |
T113 |
2969-3271 |
Sentence |
denotes |
The active H5N1 infection in Egyptian swine was again ruled out in October 2013 as the viral RNA could not be detected in 36 swine samples but interestingly, the antibodies against avian-like H5N1, H9N2, and A(H1N1)pdm09 viruses were detected in swine sera samples which suggested a past exposure [61]. |
T114 |
3272-3416 |
Sentence |
denotes |
Interestingly, 122 of the 157 swine nasal swab samples collected during 2014 and 2015 were found positive for IAV active infection using RT-PCR. |
T115 |
3417-3520 |
Sentence |
denotes |
As a result, HA subtyping identified 46 avian-origin H5N1, seven H9N2 and 69 A(H1N1)pdm09 viruses [61]. |
T116 |
3522-3528 |
Sentence |
denotes |
3.1.4. |
T117 |
3529-3534 |
Sentence |
denotes |
Kenya |
T118 |
3535-3737 |
Sentence |
denotes |
The first report of IAV in swine in Kenya appeared in May 2010 when A(H1N1)pdm09 virus were detected in eight swine samples collected from the Asembo and Kibera counties and at a Nairobi based abattoir. |
T119 |
3738-3860 |
Sentence |
denotes |
The extended serological study further identified H1N1 and H3N2 viruses in swine during August 2011 to December 2012 [62]. |
T120 |
3861-4068 |
Sentence |
denotes |
The active IAV infection was reported in four household members having acute respiratory illness while the backyard swine were negative for the IAV and IBV in Kiambu county during September 2013–August 2014. |
T121 |
4069-4194 |
Sentence |
denotes |
On the contrary, the serology identified the IAV antibodies in 230 swine sera samples suggesting a past exposure of IAV [63]. |
T122 |
4195-4337 |
Sentence |
denotes |
The A(H1N1)pdm09 virus was again reported in five swine samples collected from a slaughterhouse in Kenya during September 2013–September 2014. |
T123 |
4338-4549 |
Sentence |
denotes |
Interestingly, all the 288 human subjects including the slaughterhouse workers or the traders and farmers who had visited the slaughterhouse were negative for IAV, hence ruled out the zoonotic transmission [64]. |
T124 |
4551-4557 |
Sentence |
denotes |
3.1.5. |
T125 |
4558-4581 |
Sentence |
denotes |
Other African Countries |
T126 |
4582-4804 |
Sentence |
denotes |
Swine in Benin and Cote d’Ivoire reported no prevalence of IAV during 2009–2010 [65] while A(H1N1)pdm09 virus was detected in swine in Reunion Island during 2009–2011 [66] and in Togo during October 2012–January 2014 [67]. |
T127 |
4805-4901 |
Sentence |
denotes |
The human strain of H3N2 virus was detected in swine in Ghana during January–February 2014 [57]. |
T128 |
4902-4982 |
Sentence |
denotes |
One more report documented IAV in swine in two districts of Uganda in 2015 [68]. |
T129 |
4983-5162 |
Sentence |
denotes |
Overall, influenza viruses have been reported in swine from eight African countries including Cameroon, Nigeria, Egypt, Kenya, Reunion island, Togo, Ghana, and Uganda (Figure 4A). |
T130 |
5163-5279 |
Sentence |
denotes |
The A(H1N1)pdm09 virus, which originated in Mexican swine in 2009, has been reported in all except Ghana and Uganda. |
T131 |
5280-5509 |
Sentence |
denotes |
Interestingly, the HPAIV strain of H5N1 has been reported in swine in Nigeria and Egypt while HPAIV strain H5N2 and low pathogenic avian influenza virus (LPAIV) strain H9N2 have also been reported in the Egyptian swine (Table 1). |