scholarly journals Effectiveness of control strategies for Varroa jacobsoni and Tropilaelaps mercedesae in Papua New Guinea

2020 ◽  
Vol 80 (3) ◽  
pp. 399-407 ◽  
Author(s):  
John M. K. Roberts ◽  
Cooper N. Schouten ◽  
Reuben W. Sengere ◽  
John Jave ◽  
David Lloyd
2019 ◽  
Author(s):  
John MK Roberts ◽  
Cooper N Schouten ◽  
Reuben W Sengere ◽  
John Jave ◽  
David Lloyd

AbstractApiculture in the Pacific nation of Papua New Guinea (PNG) is under significant pressure from emerging parasitic mites, Varroa jacobsoni and Tropilaelaps mercedesae. While numerous mite control products exist, beekeepers in Papua New Guinea have limited access and resources for these products and their effectiveness under local conditions is untested. Here we determined the effectiveness of two brood manipulation strategies – queen caging and queen removal – for managing V. jacobsoni and T. mercedesae in comparison to the chemical miticide Bayvarol®. Our results found Bayvarol® was the most effective control strategy for V. jacobsoni, maintaining high efficacy (>90%) over four months with significantly reduced mean numbers of V. jacobsoni compared to untreated control hives. In contrast, mean numbers of T. mercedesae were significantly reduced by the brood manipulation strategies over two months, but not by Bayvarol® compared to the controls. These results highlight that a combination of different strategies is likely needed to effectively manage both mite pests in PNG. We discuss how these strategies could be optimised and adopted to achieve better mite management for PNG beekeepers.


2020 ◽  
Vol 11 (1) ◽  
pp. 27-40
Author(s):  
Takeshi Nishijima ◽  
Devina Nand ◽  
Nefertti David ◽  
Mathias Bauri ◽  
Robert Carney ◽  
...  

Objectives: To estimate prevalence levels of and time trends for active syphilis, gonorrhoea and chlamydia in women aged 15–49 years in four countries in the Pacific (Fiji, the Federated States of Micronesia [FSM], Papua New Guinea [PNG] and Samoa) to inform surveillance and control strategies for sexually transmitted infections (STIs). Methods: The Spectrum-STI model was fitted to data from prevalence surveys and screenings of adult female populations collected during 1995−2017 and adjusted for diagnostic test performance and to account for undersampled high-risk populations. For chlamydia and gonorrhoea, data were further adjusted for age and differences between urban and rural areas. Results: Prevalence levels were estimated as a percentage (95% confidence interval). In 2017, active syphilis prevalence was estimated in Fiji at 3.89% (2.82 to 5.06), in FSM at 1.48% (0.93 to 2.16), in PNG at 3.91% (1.67 to 7.24) and in Samoa at 0.16% (0.07 to 0.37). For gonorrhoea, the prevalence in Fiji was 1.63% (0.50 to 3.87); in FSM it was 1.59% (0.49 to 3.58); in PNG it was 11.0% (7.25 to 16.1); and in Samoa it was 1.61% (1.17 to 2.19). The prevalence of chlamydia in Fiji was 24.1% (16.5 to 32.7); in FSM it was 23.9% (18.5 to 30.6); in PNG it was 14.8% (7.39 to 24.7); and in Samoa it was 30.6% (26.8 to 35.0). For each specific disease within each country, the 95% confidence intervals overlapped for 2000 and 2017, although in PNG the 2017 estimates for all three STIs were below the 2000 estimates. These patterns were robust in the sen sitivity analyses. Discussion: This study demonstrated a persistently high prevalence of three major bacterial STIs across four countries in WHO’s Western Pacific Region during nearly two decades. Further strengthening of strategies to control and prevent STIs is warranted.


Zootaxa ◽  
2011 ◽  
Vol 3143 (1) ◽  
pp. 1 ◽  
Author(s):  
IFOR L. OWEN

The catalogue includes more than 700 parasites of domestic and wild animals recorded at the National Veterinary Laboratory, Papua New Guinea, since data began to be gathered at the end of World War 2. It incorporates some information already published and data on parasites, particularly of indigenous fauna, not recorded previously in the country. Wildlife host species include wild pig, deer, bats, murine rodents, marsupials, monotremes, birds, reptiles, amphibians, fishes and invertebrates. The range of parasites in domestic and many wild animals shows great affinity with that found in Australia. Some notable exceptions amongst domestic animal parasites are the endoparasites Trichinella papuae, Capillaria papuensis and Mammomonogamus laryngeus and the economically significant ectoparasites Chrysomya bezziana, Tropilaelaps mercedesae and Varroa jacobsoni that are not recorded in Australia. Unusual host-parasite associations include the larvae of the insects Chrysomya spp. and Lucilia sp., parasites of warm-blooded animals, infesting, respectively, cold-blooded crocodiles and cane toads, and the mammalian mite, Sarcoptes scabiei, on an avian host, cassowaries. No host switching of helminths was seen between domestic and wild animals, or between populations of deer, wild pigs and wallabies when grazing together. The economic importance of certain parasites for domestic animals, the potential threats from introduced or newly-discovered parasites, and the relationship between some parasites and their wildlife hosts, are discussed. Information is presented in two tables: a parasite–host list that includes the location of a parasite in or on a host as well as a list of references of relevance to the country, and a host–parasite list that contains the distribution of the parasites according to province or locality.


2014 ◽  
Vol 8 (11) ◽  
pp. 1391-1397 ◽  
Author(s):  
Andrew R Greenhill ◽  
Carlton Guwada ◽  
Valentine Siba ◽  
Audrey Michael ◽  
Mition Yoannes ◽  
...  

Introduction: Diarrhoea remains a major cause of illness in Papua New Guinea (PNG); however, little is known about its aetiology. As a result of the cholera outbreak that spread throughout PNG in 2009-2011, we conducted diarrhoeal surveillance in Eastern Highlands Province. Methodology: Following informed consent and a brief questionnaire, participants provided a stool sample or duplicate rectal swabs. Samples were tested for common bacterial pathogens Salmonella spp., Shigella spp., Vibrio spp., Campylobacter spp. and Yersinia enterocolitica using established culture methods. Enteric parasites were detected using microscopy. Results: A total of 216 participants were enrolled; where age was recorded, 42% were under 5 years of age, 6.7% were 5 to 17 years of age and 51.3% ≥18 years of age. One or more pathogens were detected in 68 (31.5%) participants, with Shigella (primarily S. flexneri) being the most commonly isolated (47 of 216 participants). Enteric parasites were detected in 23 of the 216 participants, occurring as a co-infection with another pathogen in 12 of 23 cases. No Vibrio cholerae was detected. Shigella isolates were commonly resistant to ampicillin, tetracycline, co-trimoxazole and chloramphenicol. Conclusions: Shigellae, specifically S. flexneri, are important pathogens in the highlands of PNG. While most studies in low-income settings focus on childhood aetiology, we have demonstrated the importance of Shigella in both children and adults. Enteric parasites remain present and presumably contribute to the burden of gastrointestinal illness. While improvements in sanitation and hygiene would help lower the burden of all aetiologies of infectious diarrhoea, additional control strategies targeting Shigella may also be warranted.


Author(s):  
Donald Denoon ◽  
Kathleen Dugan ◽  
Leslie Marshall

1984 ◽  
Vol 29 (10) ◽  
pp. 786-788
Author(s):  
Patricia M. Greenfield

2012 ◽  
Author(s):  
Esteban Tristan ◽  
Mei-Chuan Kung ◽  
Peter Caccamo

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