Local chickens have considerable potential to be developed and are reared as a source of animal protein and income. The production of local chickens is distributed across Minahasa Regency under a traditional free-ranging system. This study aims to assess the base area of local chicken farming and to determine the distribution of the superior commodity through the growth and share of local chicken production. Assessing the base area of the region for local chicken production can serve as the basis for the evaluation and design of policies. This study utilized a location quotient (LQ) approach in the empirical works in the regency and district. This analytical tool was applied to analyze the dynamics of the economic base in the cases of districts in Minahasa Regency, Indonesia. The analysis results denoted that 17 of 25 districts in Minahasa Regency ranked among the top base areas for local chicken development, as indicated by the highest LQ coefficients. Concerning the district potential base area, three districts fell into the superior category, four districts belonged to the static category, and 15 districts were in the potential category. This evidence reflects the potential and prospects of local chicken farming and its development plans as a leading commodity in Minahasa Regency. Encouraging farmers to maintain and develop livestock enterprises could support the provision of animal protein for consumption. There has been hope for the future of the local chicken commodity thanks to its inclusive development in resource-rich base areas. 

Assessment of Local Chicken Production Base Area in Minahasa Regency: A Location Quotient Approach

: Climate change and extreme weather conditions remain major threats to the attainment of well-being outcomes such as food security in sub-Saharan Africa. Thus, it is critical to identify and promote resilient value chains in order to ensure food security in the wave of extreme weather conditions such as drought. This study seeks to evaluate the effects of participating in indigenous chicken markets on smallholder farmers’ food and nutrition security in terms of household dietary diversity score. Cross-sectional data collected from 215 randomly selected farmers in Chiredzi and Mwenezi districts, Zimbabwe was used in this study. The endogenous treatment effect model was employed to determine the effects of market participation on household dietary diversity score. The findings showed that 76% of interviewed farmers participated in indigenous chicken markets. On average, participating in indigenous chicken markets increases the likelihood of having a higher household dietary diversity score by about 60%. This suggests that engagement in indigenous chicken value chain strengthens smallholder farmers’ resilience through attainment of food and nutrition security. Therefore, investment in capacity building of smallholder farmers to engage in indigenous chicken value chains should be prioritised and to support market engagement, indigenous chicken production contract arrangements with private firms should be promoted.

Indigenous chicken market participation and smallholder farmers’ well-being outcomes in Chiredzi and Mwenezi Districts of Zimbabwe

: All-optical ultrasound (OpUS) has emerged as an imaging paradigm well-suited to minimally invasive imaging due to its ability to provide high resolution imaging from miniaturised fibre optic devices. Here, we report a fibre optic device capable of concurrent laser interstitial thermal therapy (LITT) and real-time in situ all-optical ultrasound imaging for lesion monitoring. The device comprised three optical fibres: one each for ultrasound transmission, reception and thermal therapy light delivery. This device had a total lateral dimension of < 1 mm and was integrated into a medical needle. Simultaneous LITT and monitoring were performed on ex vivo lamb kidney with lesion depth tracked using M-mode OpUS imaging. Using one set of laser energy parameters for LITT (5 W, 60 s), the lesion depth varied from 3.3 mm to 8.3 mm. In all cases, the full lesion depth could be visualised and measured with the OpUS images and there was a good statistical agreement with stereomicroscope images acquired after ablation (t = 1.36, p = 0.18). This work demonstrates the feasibility and potential of OpUS to guide LITT in tumour resection.

Miniaturised dual-modality all-optical ultrasound probe for laser interstitial thermal therapy (LITT) monitoring

: Photoacoustic (PA) endoscopy has shown significant potential for clinical diagnosis and surgical guidance. Multimode fibres (MMFs) are becoming increasingly attractive for the development of miniature endoscopy probes owing to their ultrathin size, low cost and diffraction-limited spatial resolution enabled by wavefront shaping. However, current MMF-based PA endomicroscopy probes are either limited by a bulky ultrasound detector or a low imaging speed that hindered their usability. In this work, we report the development of a highly miniaturised and high-speed PA endomicroscopy probe that is integrated within the cannula of a 20 gauge medical needle. This probe comprises a MMF for delivering the PA excitation light and a single-mode optical fibre with a plano-concave microresonator for ultrasound detection. Wavefront shaping with a digital micromirror device enabled rapid raster-scanning of a focused light spot at the distal end of the MMF for tissue interrogation. High-resolution PA imaging of mouse red blood cells covering an area 100 µ m in diameter was achieved with the needle probe at ∼ 3 frames per second. Mosaicing imaging was performed after fibre characterisation by translating the needle probe to enlarge the field-of-view in real-time. The developed ultrathin PA endomicroscopy probe is promising for guiding minimally invasive surgery by providing functional, molecular and microstructural information of tissue in real-time.

Ultrathin, high-speed, all-optical photoacoustic endomicroscopy probe for guiding minimally invasive surgery

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Indigenous chicken market participation and smallholder farmers’ well-being outcomes in Chiredzi and Mwenezi Districts of Zimbabwe

Miniaturised dual-modality all-optical ultrasound probe for laser interstitial thermal therapy (LITT) monitoring

Ultrathin, high-speed, all-optical photoacoustic endomicroscopy probe for guiding minimally invasive surgery