Article
Microbiology
Matthew Turner, Vincent Peta, Jose E. Pietri
Summary: Diarrheal diseases are common worldwide, and German cockroaches may be one of the causes. Previous studies believed that cockroaches transmit pathogens through mechanical transmission, but new research has found that Salmonella enterica serovar Typhimurium replicates in the cockroach's gut and forms biofilm-like aggregates. Furthermore, two mutant strains have been identified, which are associated with the interaction between the bacteria and cockroach vectors. These findings suggest that the transmission of Salmonella by cockroaches may not be solely mechanical and highlight the importance of cockroach control in infection prevention.
RESEARCH IN MICROBIOLOGY
(2022)
Article
Environmental Sciences
Steffi Rocchi, Benoit Valot, Audrey Laboissiere, Audrey Guitton, Emeline Scherer, Laurence Millon, Gabriel Reboux
Summary: Cockroach allergens have a greater impact on asthma morbidity than those from dust mites, cats, and dogs. The American cockroach and the German cockroach are most frequently responsible for sensitization. The worldwide prevalence of allergic sensitization has been estimated at 2 to 26 % and is influenced by unfavorable socioeconomic conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Agriculture, Multidisciplinary
Ferhat Kucuksari, Hasan Tunaz
Summary: The study found that the efficacy of spinetoram against Blatella germanica adults varied significantly based on different concentrations and exposure times. Lower concentrations resulted in lower mortality rates, while higher concentrations led to 100% mortality within a shorter period of time. Significant differences in efficacy were observed between different surfaces, with concrete surface showing higher mortality rates at 100 mg/m2 concentration.
KSU TARIM VE DOGA DERGISI-KSU JOURNAL OF AGRICULTURE AND NATURE
(2021)
Article
Biochemistry & Molecular Biology
Zeynab Alborzi, Maria-Dolors Piulachs
Summary: The transcription factor Ftz-f1 plays multiple roles in insect development, including the regulation of steroidogenic enzymes in insect ovaries. Injecting dsftz-f1 into female Blattella germanica at different time points prevented oviposition and resulted in changes in gene expression related to steroidogenesis. These findings suggest that Ftz-f1 regulates the expression of steroidogenic genes in B. germanica, with phm possibly being a key target.
INSECT MOLECULAR BIOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Ming He, Yun-Feng Ma, Huan Guo, Xuan-Zheng Liu, Gui-Jun Long, Qin Wang, Youssef Dewer, Fan Zhang, Peng He
Summary: In this study, we conducted transcriptome analysis of different tissues in the German cockroach, Blattella germanica, and identified novel chemosensory proteins and sensory neuron membrane proteins. We also analyzed the phylogenetic tree and gender-specific expression of multiple chemosensory gene families. The results revealed significant tissue-specific expression of certain chemosensory proteins in the antennae of the German cockroach.
Article
Agriculture, Multidisciplinary
Kadir Ozcan, Hasan Tunaz
Summary: The study investigated the mortality effects of BGN-1 diatomaceous earth on adult German cockroaches on concrete, ceramic parquet surfaces. Different doses of diatom soil were applied for 6 days, showing significant effects on mortality rates with exposure time.
KSU TARIM VE DOGA DERGISI-KSU JOURNAL OF AGRICULTURE AND NATURE
(2022)
Article
Environmental Sciences
Alexander A. Karpenko, Vyacheslav S. Odintsov, Aleksandra A. Istomina
Summary: The study used PTFE micro- and nano-particles as reference particles to investigate the biological effects of plastic pollution, successfully identifying the particles in biological medium using the methods of atomic markers, polarization microscopy, and Raman spectroscopy. This suggests that PTFE particles can be detected and identified in biological samples.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Engineering, Environmental
Evgenios Agathokleous, Ivo Iavicoli, Damia Barcelo, Edward J. Calabrese
Summary: The study reveals that microplastics exhibit threshold and hormesis dose responses in organisms. Environmental doses of microplastics may induce positive effects, while high doses can increase the negative effects of other pollutants.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Entomology
Juan Liu, Yong Xu, Chong Li, Ai Tan, Jiarui Zeng, Peng Liu, Xuelan Yu, Mingqiang Wang, Rongzhuo Wang, Wenbin Luo, Xinghui Qiu
Summary: The long-term and frequent use of pyrethroid insecticides has led to the development of pyrethroid resistance in insect populations. This study investigated the presence and frequency of knockdown resistance (kdr) mutations in field populations of the German cockroach in China and identified a new amino acid substitution L993S. The high levels of pyrethroid resistance in these populations suggest the need for alternative insecticides with different mode of action for controlling German cockroaches in these regions.
JOURNAL OF ECONOMIC ENTOMOLOGY
(2022)
Article
Public, Environmental & Occupational Health
Mohammad Reza Khaksar, Majid Kababian, Roohollah Fateh, Abedin Saghafipour, Hassan Vatandoost, Mona Sharififard
Summary: The combination of fenitrothion and Metarhizium anisopliae showed a significant mortality rate effect on German cockroach nymphs. The optimal dose of fenitrothion used in combination with the effective concentration of M. anisopliae seems essential to reduce the population of German cockroach nymphs. The results suggest that this method could be a suitable approach with low cost and minimal environmental damage and impact on other organisms.
JOURNAL OF ARTHROPOD-BORNE DISEASES
(2021)
Article
Food Science & Technology
Jin Zhang, Yirui Chen, Jiaqi Zhang, Yitong Wang, Yanan Liu
Summary: Extra-cellular polysaccharides (EPSs) exhibit excellent immunomodulatory functions, enhancing immune indices of the spleen and thymus significantly. They also have an impact on the release of immune factors.
Article
Biotechnology & Applied Microbiology
A. Nakamura, H. Takahashi, S. Sulaiman, C. Phraephaisarn, S. Keeratipibul, T. Kuda, B. Kimura
Summary: Chicken peptone was produced by hydrolysing inedible chicken parts and evaluated for its usefulness as a nutrient source for bacteria. The study found that chicken peptone can effectively support bacterial growth, with higher protease activity compared to other commercial peptones.
LETTERS IN APPLIED MICROBIOLOGY
(2021)
Article
Entomology
Emiliano Bone, Beatriz Araoz, Paola Gonzalez-Audino, Valeria Sfara
Summary: This study explored differences in feeding behavior between susceptible and pyrethroid-resistant strains of Blattella germanica. Resistant individuals showed lower performance in locating food sources and a lower capacity in detecting food odors. In addition, resistant individuals had a slower intake rate when exploiting food sources of the same stiffness.
NEOTROPICAL ENTOMOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Maria Cristina Guerrera, Marialuisa Aragona, Caterina Porcino, Francesco Fazio, Rosaria Laura, Maria Levanti, Giuseppe Montalbano, Germana Germana, Francesco Abbate, Antonino Germana
Summary: This article summarizes the latest research results on the effects of micro- and nano-plastics on different fish species, emphasizing their significance in assessing human health risks, and discusses the entry pathways and bioaccumulation mechanisms of these particles in fish bodies.
APPLIED SCIENCES-BASEL
(2021)
Article
Geosciences, Multidisciplinary
Manuel Ruben, Jens Hefter, Florence Schubotz, Walter Geibert, Martin Butzin, Torben Gentz, Hendrik Grotheer, Matthias Forwick, Witold Szczucinski, Gesine Mollenhauer
Summary: Traditionally, rock-derived or petrogenic organic carbon has been considered non-bioavailable and not actively involved in the carbon cycle. However, recent studies suggest that this carbon may not be as inert as previously thought, especially in fjord systems with high influxes of petrogenic organic carbon, which could contribute to greenhouse gas emissions. The extent to which microorganisms utilize this organic carbon is not well understood, but it plays a significant role in the global carbon cycling. Radiocarbon analysis of intact polar lipid-fatty acids in marine sediments from Hornsund Fjord, Svalbard, revealed that bacterial communities in the area utilize 5 +/- 2% to 55 +/- 6% (average of 25 +/- 16%) of petrogenic organic carbon for biosynthesis after sediment redeposition. This suggests that the lack of recently synthesized organic carbon from primary production forces microorganisms to rely on petrogenic organic carbon as an alternative energy source, highlighting its importance in carbon cycling.