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Acoustic divergence in two cryptic Hipposideros species: a role for social selection?

Kingston T, Lara MC, Jones G, Akbar Z, Kunz TH, Schneider CJ

Proc Biol Sci, 2001 Jul 7;268(1474):1381-6.
PMID: 11429138

We present evidence that a relatively widespread and common bat from South East Asia comprises two morphologically cryptic but acoustically divergent species. A population of the bicoloured leaf-nosed bat (Hipposideros bicolor) from Peninsular Malaysia exhibits a bimodal distribution of echolocation call frequencies, with peaks in the frequency of maximum energy at ca. 131 and 142 kHz. The two phonic types are genetically distinct, with a cytochrome b sequence divergence of just under 7%. We consider the mechanisms by which acoustic divergence in these species might arise. Differences in call frequency are not likely to effect resource partitioning by detectable prey size or functional range. However, ecological segregation may be achieved by differences in microhabitat use; the 131kHz H. bicolor is characterized by significantly longer forearms, lower wing loading, a lower aspect ratio and a more rounded wingtip, features that are associated with greater manoeuvrability in flight that may enable it to forage in more cluttered environments relative to the 142 kHz phonic type. We suggest that acoustic divergence in these species is a consequence of social selection for a clear communication channel, which is mediated by the close link between the acoustic signal and receptor systems imposed by the highly specialized nature of the hipposiderid and rhinolophid echolocation system.
Fulltext Perception and practices of community pharmacists towards antimicrobial stewardship in Lahore, Pakistan

Akbar Z, Saleem Z, Shaukat A, Farrukh MJ

J Glob Antimicrob Resist, 2021 06;25:157-161.
PMID: 33789207 DOI: 10.1016/j.jgar.2021.03.013

OBJECTIVES: Antimicrobial resistance is a major health concern worldwide. Community pharmacists can play an important role in rational antibiotic use. This study aimed to evaluate the perception and practices of community pharmacists regarding antimicrobial stewardship (AMS) in Lahore, Pakistan.
METHODS: A descriptive cross-sectional study was conducted among community pharmacists in Lahore from 1 November 2017 to 31 December 2017. A self-administered questionnaire was used for data collection. Non-probability convenience sampling was performed to select community pharmacists. Descriptive statistics were applied and Mann-Whitney U-tests and Kruskal-Wallis tests were performed to compare independent groups using SPSS v.20.0. A P-value of <0.05 was considered statistically significant. Perception and practice scores were determined to access community pharmacist knowledge regarding AMS. A score of 0.5-1 was considered to be very good.
RESULTS: The overall response rate was 70.9%. Sex, age, work experience and education level did not significantly influence the perception and practices of community pharmacists. Experienced pharmacists showed a better response to AMS. The majority of pharmacists strongly agreed that they educate patients on the use of antimicrobials and resistance-related issues.
CONCLUSION: It was concluded that community pharmacists in Lahore have good perception regarding AMS and they are practicing it well. But there are several gaps in their practices that must be filled, such as dispensing without a prescription and dispensing for a longer duration than prescribed. Additionally, there should be strict implementation of guidelines for dispensing antibiotics in order to rationalise antibiotic use and decrease antimicrobial resistance.
Fulltext Urban forest fragmentation impoverishes native mammalian biodiversity in the tropics

Tee SL, Samantha LD, Kamarudin N, Akbar Z, Lechner AM, Ashton-Butt A, et al.

Ecol Evol, 2018 Dec;8(24):12506-12521.
PMID: 30619561 DOI: 10.1002/ece3.4632

Urban expansion has caused major deforestation and forest fragmentation in the tropics. The impacts of habitat fragmentation on biodiversity are understudied in urban forest patches, especially in the tropics and little is known on the conservation value of the patches for maintaining mammalian biodiversity. In this study, camera trapping was used to determine the species composition and species richness of medium- and large-sized mammals in three urban forest patches and a contiguous forest in Peninsular Malaysia. We identified the key vegetation attributes that predicted mammal species richness and occurrence of herbivores and omnivores in urban forest patches. A total number of 19 mammal species from 120 sampling points were recorded. Contiguous forest had the highest number of species compared to the urban forest patches. Sunda Pangolin and Asian Tapir were the only conservation priority species recorded in the urban forest patches and contiguous forest, respectively. Top predators such as Malayan Tiger and Melanistic Leopard were completely absent from the forest patches as well as the contiguous forest. This was reflected by the abundance of wild boars. We found that mammal species richness increased with the number of trees with DBH less than 5 cm, trees with DBH more than 50 cm, and dead standing trees. In the future, the remaining mammal species in the urban forest patches are expected to be locally extinct as connecting the urban forest patches may be infeasible due to land scarcity. Hence, to maintain the ecological integrity of urban forest patches, we recommend that stakeholders take intervention measures such as reintroduction of selected species and restocking of wild populations in the urban forest patches to regenerate the forest ecosystems.
Fulltext WHO key access antibiotics price, availability and affordability in private sector pharmacies in Pakistan

Saleem Z, Saeed H, Akbar Z, Saeed A, Khalid S, Farrukh L, et al.

Cost Eff Resour Alloc, 2021 Feb 16;19(1):10.
PMID: 33593366 DOI: 10.1186/s12962-021-00263-x

BACKGROUND: Poor availability and unaffordability of key access antibiotics may increase antimicrobial resistance in the community by promoting inappropriate antibiotic selection and abridged therapy compliance.
OBJECTIVE: To check the prices, availability, and affordability of the World Health Organization (WHO) key access antibiotics in private sector pharmacies of Lahore, Pakistan.
METHODOLOGY: A survey of WHO key access antibiotics from WHO essential medicine list 2017 was conducted in private sector pharmacies of 4 different regions of Lahore employing adapted WHO/HAI methodology. The comparison of prices and availability between originator brands (OB) and lowest price generics (LPG) were conducted followed by the effect of medicine price differences on patient's affordability. The data were analyzed using a preprogrammed WHO Microsoft excel workbook.
RESULTS: The mean availability of OB products was 45.20% and the availability of LPGs was 40.40%. The OBs of co-amoxiclav, clarithromycin and metronidazole and LPGs of azithromycin and ciprofloxacin were easily available (100%) in all private sector pharmacies. Whereas, antibiotics like chloramphenicol, cloxacillin, nitrofurantoin, spectinomycin, and cefazolin were totally unavailable in all the surveyed pharmacies. The OBs and LPGs with high MPRs were ceftriaxone (OB; 15.31, LPG; 6.38) and ciprofloxacin (OB; 12.42, LPG; 5.77). The median of brand premium obtained was 38.7%, which varied between the lowest brand premium of 3.97% for metronidazole and highest for ceftriaxone i.e. 140%. The cost of standard treatment was 0.5 day's wage (median) if using OB and 0.4 day's wage (median) for LPG, for a lowest paid unskilled government worker. Treatment with OB and LPG was unaffordable for ciprofloxacin (OB; 2.4, LPG; 1.1) & cefotaxime (OB; 12.7, LPG; 8.1).
CONCLUSION: There is dire need to properly implement price control policies to better regulate fragile antibiotic supply system so that the availability of both OB and LPG of key access antibiotics should be increased. The prices could be reduced by improving purchasing efficiency, excluding taxes and regulating mark-ups. This could increase the affordability of patients to complete their antibiotic therapy with subsequent reduction in antimicrobial resistance.