Table 4.
Laboratory no. | Date of collection | Date of testing | Description | Trap no. | Mosquito species in pool | No. of insects tested | Real-time PCR | |||
---|---|---|---|---|---|---|---|---|---|---|
BFV† | KUNV† | MVEV† | RRV† | |||||||
1 | May 14 | May 17 | Base camp vicinity | 3 | Mixed culicines | 5 | BFV 39* | NA‡ | NA‡ | NA‡ |
2 | May 15 | May 17 | Airstrip | 5 | Culex annulirostris | 12 | Neg | NA‡ | NA‡ | NA‡ |
3 | May 15 | May 17 | Camp area | 6 | Mixed | 10 | BFV | NA‡ | NA‡ | NA‡ |
4 | May 15 | May 17 | Camp area | 6 | Cx. annulirostris | 5 | BFV | NA‡ | NA‡ | NA‡ |
5 | May 15 | May 17 | Creek junction | 7 | Culex quinquefasciatus | 12 | BFV | NA‡ | NA‡ | NA‡ |
6 | May 15 | May 17 | Creek junction | 7 | Mixed culicines including Aedes | 7 | BFV 36 | NA‡ | NA‡ | NA‡ |
7 | May 15 | May 17 | Creek junction | 7 | Cx. annulirostris | 20 | BFV 38 | NA‡ | NA‡ | NA‡ |
8 | May 16 | May 17 | Homestead | 9 | Mixed mosquitoes | 18 | BFV 39 | NA‡ | NA‡ | NA‡ |
9 | May 16 | May 17 | Homestead | 9 | Cx. annulirostris | 20 | BFV 39 | NA‡ | NA‡ | NA‡ |
10 | May 15 | May 17 | Range control buildings | 8 | Mixed culicines | 6 | Neg | NA‡ | NA‡ | NA‡ |
11 | May 16 | May 17 | Creek | 11 | Mixed culicines | 6 | Neg | NA‡ | NA‡ | NA‡ |
12 | May 16 | May 17 | Creek | 11 | Cx. annulirostris | 12 | Neg | NA‡ | NA‡ | NA‡ |
13 | May 16 | May 17 | Creek | 12 | Cx. annulirostris | 10 | BFV | NA‡ | NA‡ | NA‡ |
14 | May 16 | May 17 | Creek | 12 | Mixed mosquito spp. | 9 | Neg | NA‡ | NA‡ | NA‡ |
15 | May 14 | May 17 | Creek base camp vicinity | 2 | Cx. annulirostris | 10 | Neg | NA‡ | NA‡ | NA‡ |
16 | May 14 | May 17 | Case camp vicinity | 2 | Mixed Aedes spp. | 6 | BFV 38 | NA‡ | NA‡ | NA‡ |
17 | May 16 | May 17 | – | 10 | Cx. annulirostris | 12 | Neg | NA‡ | NA‡ | NA‡ |
18 | May 17 | May 17 | Non-template control | – | NTC | – | Neg | NA‡ | NA‡ | NA‡ |
19 | May 17 | May 17 | Control tower | 13 | Cx. annulirostris | 5 | NA§ | Neg | Neg | Neg |
20 | May 17 | May 17 | Hut | 15 | Cx. annulirostris | 12 | NA§ | Neg | Neg | Neg |
21 | May 17 | May 17 | Airfield | 5 | Anopheles annulipes | 14 | NA§ | Neg | Neg | Neg |
22 | May 14 | May 17 | Base camp vicinity | 2 | An. annulipes | 9 | NA§ | Neg | Neg | RRV |
23 | May 14 | May 17 | Woodland | 4 | An. annulipes | 2 | NA§ | Neg | Neg | Neg |
24 | May 16 | May 17 | Camp site | 10 | Cx. annulirostris | 25 | NA§ | Neg | Neg | Neg |
25 | May 17 | May 17 | Hut | 15 | Aedes linneatipennis | 13 | NA§ | Neg | Neg | Neg |
26 | May 17 | May 17 | Control tower | 13 | Aedes tremulus | 17 | NA§ | Neg | Neg | Neg |
27 | May 18 | May 18 | Buildings | 16 | Cx. annulirostris | 4 | NA§ | Neg | MVEV 37 | RRV 34 |
28 | May 18 | May 18 | Buildings | 16 | An. annulipes | 7 | NA§ | Neg | MVEV 26 | Neg |
29 | May 18 | May 18 | Camp site | 17 | Cx. annulirostris | 11 | NA§ | Neg | MVEV 33 | Neg |
30 | May 18 | May 18 | Creek | 18 | Cx. annulirostris | 3 | BFV 16 | Neg | MVEV 36 | RRV 37 |
31 | May 18 | May 18 | Creek | 18 | Culex bitaeniorhynchus | 10 | BFV 17 | Neg | MVEV 33 | RRV 34 |
32 | May 18 | May 18 | Creek | 18 | Coquillettidia xanthogaster | 20 | BFV 17 | Neg | MVEV 34 | RRV 36 |
33 | May 18 | May 18 | Camp site | 19 | Cx. annulirostris | 9 | NA§ | Neg | MVEV 30 | RRV 32 |
BFV = Barmah Forest virus; KUNV = Kunjin virus; MVEV = Murray Valley Encephalitis virus; NA = not applicable; Neg = negative; PCR = polymerase chain reaction; RRV = Ross River Virus.
Positive qPCR assay results expressed as cycling threshold (Ct) values when < 40.0, and negative when Ct ≥ 40.0.
Traps per arbovirus were BFV = 16, KUNV = 10, MVEV = 10, and RRV = 10. Trap numbers correspond to numbered boxes in Figure 1.
Limited analysis of tested mosquito extracts for only BFV due to expected low sensitivity of testing small numbers of trapped insects (below preferred minimum aliquot of 25 insects).
Exhaustion of BFV PCR master mix prevented analysis of all second series of mosquito pools.