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JR Caldera, PhD, D(ABMM)

@jrcaldera.bsky.social
1.1K followers 686 following 45 posts

Clinical Microbiologist #ClinMicro #IDSky Assoc. Science Director - Quest Dx Inf Disease. UCLA ClinMicroFellowship. Cedars-Sinai BiomedSciPhD. Harbor-UCLA ClinLabSci. CSULB MicroBS. 🔬+🍟(posts=own opinion)

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Reposted by JR Caldera, PhD, D(ABMM)
Clinical Infectious Diseases @cidjournal.bsky.social · 29/09/2026
Influenza vaccine effectiveness against influenza A-associated hospitalization and severe in-hospital outcomes among adults in the United States, 2024–2025 ✅ Just Accepted 🔗 bit.ly/47oa0Lz
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 06/06/2026
Had a great time at #ASMicrobe in D.C. Learned some new science. Participated in career advancement sessions. Reconnected with amazing colleagues!
Opening session with the new logoCareer advancement sessionFormer UCLA CPEP fellowsFormer UCLA and HUP/CHOP fellows
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Reposted by JR Caldera, PhD, D(ABMM)
ASM @asm.org · 27/04/2026
Dismissing all members of the National Science Board will only continue the destabilization of American fundamental research and scientific workforce development. Read our statement: brnw.ch/21x1Z8n
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Reposted by JR Caldera, PhD, D(ABMM)
Ryan Marino, MD @ryanmarino.bsky.social · 23/04/2026
The fact that the US Secretary of Health denies that pathogens cause disease should always be a much bigger story
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 23/04/2026
In honor of lab week, here’s an unedited photo of my lab 😌 #ClinMicro (My lab is actually the opposite building but you get the gist. Looks identical 😅)
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 21/04/2026
Happy #LabWeek! Enter ASM’s caption contest for a chance to win a Visa gift card!!! asm.social/2U7 #ClinMicro #IDSky
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Reposted by JR Caldera, PhD, D(ABMM)
Association for Diagnostics & Laboratory Medicine @myadlm.bsky.social · 19/04/2026
Join us all #𝗟𝗮𝗯𝗪𝗲𝗲𝗸 as we spotlight the people and science behind the lab. Help us celebrate and spread the word by reposting our content or sharing content of your own and using  #𝗔𝗗𝗟𝗠𝗟𝗮𝗯𝗪𝗲𝗲𝗸𝟮𝟬𝟮𝟲 and #𝗠𝗟𝗣𝗪𝟮𝟬𝟮𝟲.
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 20/04/2026
Happy Lab Week!!!!
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Reposted by JR Caldera, PhD, D(ABMM)
Clinical Infectious Diseases @cidjournal.bsky.social · 16/04/2026
Recombinant vs Standard Influenza Vaccine in Adults With Severe Obesity: A Randomized Clinical Trial ✅ Just Accepted 🔗 bit.ly/4uaKeUH
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Reposted by JR Caldera, PhD, D(ABMM)
Prof. Nicole Holliday @mixedlinguist.bsky.social · 11/04/2026
Humanity did that. Science did that. Publicly-funded research did that. Excellent universities did that. Diversity did that. International cooperation did that. Artemis II is a perfect example of what we can do at our best. Welcome home, Integrity crew!
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Reposted by JR Caldera, PhD, D(ABMM)
bioRxiv Immunology @biorxiv-immuno.bsky.social · 22/11/2025
Single-Cell Multi-Omics Dissects Transcript Isoform and Immune Repertoire Dynamics in Human Immunosenescence www.biorxiv.org/content/10.1101/202…
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Reposted by JR Caldera, PhD, D(ABMM)
The American Academy of Pediatrics @ameracadpeds.bsky.social · 20/11/2025
“Since 1998, independent researchers have conducted more than 40 high-quality studies involving over 5.6 million people. The conclusion is clear and unambiguous: There’s no link between vaccines and autism." -Dr. Susan Kressly, AAP President on recent changes to the CDC's website
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Reposted by JR Caldera, PhD, D(ABMM)
Jake Scott, MD @jakescottmd.bsky.social · 30/10/2025
NEW @nejm.org: We synthesized 511 recent studies on Covid-19, RSV & flu vaccines for 2025-26. With federal advisory processes disrupted, clinicians & the public need rigorous, independent evidence synthesis. Here's what we found: 🧵 www.nejm.org/doi/full/10....
nejm.org
Updated Evidence for Covid-19, RSV, and Influenza Vaccines for 2025–2026 | NEJM
Changes in the vaccine advisory process in the United States have disrupted immunization guidance, which reinforces the need for independent evidence review to inform decisions regarding immunizati...
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 01/10/2025
Been a while, but I’m glad my feed is still filled with a strong community of scientists! Wanted to share this amazing honor from ASCP as one of their 2025 40 Under Forty honorees. And also to show off this mini scientist my cousin got me. My tchotchke shelf at work is growing ☺️ #ClinMicro
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 02/07/2025
New pub alert! 🚨 my fellowship project from @uclapathology.bsky.social is finally out, and I’ll be discussing it at next Monday’s CCMID meeting if you’re interested! #ClinMicro #IDSky
journals.asm.org
Development and validation of next-generation sequencing-based clinical test for triazole resistance prediction in Aspergillus fumigatus | Journal of Clinical Microbiology
The rising rates of antifungal resistance have been expressed by many as “the silent pandemic,” profoundly reshaping the landscape of fungal disease management. Innovations in clinical mycology, howev...
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Reposted by JR Caldera, PhD, D(ABMM)
IDSA @idsainfo.bsky.social · 26/06/2025
"We will not stay silent." IDSA President Tina Tan, MD, FIDSA, FPIDS, FAAP, joins @ameracadpeds.bsky.social, @acpimphysicians.bsky.social, @acog.org, and @aafp.org in urging evidence-based vaccine recommendations. bit.ly/443ptQw
bit.ly
We will not stay silent on vaccines, say leaders of five major U.S. medical associations
“We cannot and will not gamble with our patients’ health or the health of our communities,” write the presidents of the AAFP, AAP, ACP, ACOG, and IDSA.
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 23/06/2025
I always look forward to ASM Microbe, but 2025 was particularly special because it was hosted in my neck of the woods. I hope my colleagues got to see everything that is beautiful about Los Angeles! #ClinMicro #ASMicrobe2025
Officially recognized as a Diplomate of the American Board of Medical Microbiology at the ABMM mixerA long history of UCLA excellence in Clinical Microbiology The best CPEP co-fellows anyone could ask forParticipated in a career seminar for budding microbiologists
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 09/06/2025
#ClinMicro #IDSky
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Reposted by JR Caldera, PhD, D(ABMM)
Paul Adamson MD MPH @padamsonmd.bsky.social · 06/06/2025
There was a cluster of #XDR #Shigella sonnei carrying blaCTX-M-15 in LA ('23-24), reported by @jrcaldera.bsky.social While infections are usually self-limited, one of these cases was severe, in a person living with #HIV and low CD4 www.ajicjournal.org/article/S019... @ajicjournal.bsky.social
ajicjournal.org
Cluster of extensively drug-resistant Shigella sonnei carrying blaCTX-M-15 in Los Angeles, California, 2023 to 2024
We describe 3 cases of extensively drug-resistant Shigella sonnei infections among men who have sex with men in Los Angeles, CA. Using whole-genome sequencing, we determined that they are highly genet...
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Reposted by JR Caldera, PhD, D(ABMM)
Paul Adamson MD MPH @padamsonmd.bsky.social · 06/06/2025
🚨 Extensively drug-resistant #Shigella is increasing in #LosAngeles. PLWH and GBMSM are disproportionately affected. We have seen several of these, very difficult to treat. Antibiogram shows 📈 resistance, susceptibility testing is 🔑. #IDsky #Medsky #EMSky #AMR #XDR 🔗: t.e2ma.net/webview/3apx...
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Reposted by JR Caldera, PhD, D(ABMM)
Elizabeth Jacobs, PhD @elizabethjacobs.bsky.social · 30/04/2025
RFK Jr. ordered the NIH’s Integrated Research Facility in Frederick to stop all research on serious infectious diseases yesterday at 5:00 PM. They study pathogens like Ebola there. You may be familiar with it from The Hot Zone. www.wired.com/story/hhs-ni...
wired.com
RFK Jr.'s HHS Orders Lab Studying Deadly Infectious Diseases to Stop Research
NIAID's Integrated Research Facility is one of the few federal facilities charged with studying Ebola. Tuesday afternoon, all of its work was put on indefinite pause by Robert F. Kennedy Jr.'s departm...
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 15/04/2025
For levity 😬
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 03/04/2025
🚨New pub alert! Hot-off the press! #ClinMicro “[Rhinovirus] was the most common viral pathogen in young children, even during the height of the COVID-19 pandemic, and was an independent driver of moderate-to-severe disease, particularly in children with comorbidities.” www.mdpi.com/2036-7449/17...
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 01/04/2025
🙌🏽 #ClinMicro
natlawreview.com
A Final Rule Bites the Dust: Federal Court Rules FDA Lacks Authority to Regulate LDTs
The order is in, and the LDT Final Rule is out.
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Reposted by JR Caldera, PhD, D(ABMM)
NBC News @nbcnews.com · 25/03/2025
“Now that the pandemic is over, the grants and cooperative agreements are no longer necessary," federal health authorities wrote to funding recipients this week.
nbcnews.to
CDC is pulling back $11B in Covid funding sent to health departments across the U.S.
“Now that the pandemic is over, the grants and cooperative agreements are no longer necessary," federal health authorities wrote to funding recipients this week.
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 25/03/2025
#ClinMicro #IDSky In 5 minutes
labroots.com
Role of type-specific and confirmatory Herpes Simplex Virus IgG testing in diagnosing genital herpes
• HSV types, anatomical sites and mechanisms of infection/reactivation • Factors in transmission of genital HSV infections • Methods to identify HSV infections • Type-spe
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Reposted by JR Caldera, PhD, D(ABMM)
Gleafer @gleafer.bsky.social · 16/03/2025
(Me flirting) Did you know microbes in the human body contribute MORE to the human body’s survival than our bodies themselves? And there are more microbial genes than human in our bodies? We just big ol’ walkin’ terrariums. The sauce: www.nih.gov/news-events/...
nih.gov
NIH Human Microbiome Project defines normal bacterial makeup of the body
Genome sequencing creates first reference data for microbes living with healthy adults.
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Reposted by JR Caldera, PhD, D(ABMM)
APHL @aphl.org · 12/03/2025
Currently, four cases of clade I mpox have been detected in this country. Our latest blog highlights how the third case was uncovered in New Hampshire and the state public health laboratory's quick response. #mpox #infectiousdisease #publichealthpreparedness #LRN Read more:
buff.ly
New Hampshire Reported the Country’s Third Clade I Mpox Case: How the State’s Public Health Laboratory System Sprung Into Action - APHL Blog
By Donna Campisano, specialist, Communications, APHL When it comes to detecting an infectious disease and launching an effective public health response, quick action is everything. And New…
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 05/03/2025
This 👇 #ClinMicro 🤝 #IDSky 🤝 Global Public
cmi-comms.com
From medical editors: A call to the global infectious diseases and clinical microbiology community
The views expressed by the authors are their own and do not necessarily reflect those of the European Society for Clinical Microbiology and Infectious Diseases (ESCMID) or Elsevier.
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Reposted by JR Caldera, PhD, D(ABMM)
chasingmicrobes @chasingmicrobes.bsky.social · 03/03/2025
CDC Staff Prohibited From Co-Authoring Papers With World Health Organization Personnel
huffingtonpost.co.uk
CDC Staff Prohibited From Co-Authoring Papers With World Health Organization Personnel
It’s just the latest “Orwellian” crackdown on government scientists.
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 31/01/2025
🚨New Pub Alert! Our 1000-Karius retrospective is out! #ClinMicro #IDSky @uclapathology.bsky.social
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Reposted by JR Caldera, PhD, D(ABMM)
ᐯIᑕTOᖇ ᑎIᘔET, ᗰᗪ @nizet.bsky.social · 24/01/2025
Scientists and Physicians I’m being serious here —at this precarious juncture, along with all other defensive and support strategies, it is important to seize the public narrative—high level investment and leadership in medical discovery and innovation is unabashedly patriotic! USA! USA! USA!
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Reposted by JR Caldera, PhD, D(ABMM)
iddoctor.bsky.social @iddoctor.bsky.social · 22/01/2025
Following the withdrawal from the WHO, pausing communication from government health agencies is very concerning. #idsky www.cnn.com/2025/01/21/h...
cnn.com
Trump administration directs federal health agencies to pause communications | CNN
Amid a deluge of executive actions, the Trump administration has directed federal health agencies to pause external communications, such as regular scientific reports, updates to websites and health a...
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Reposted by JR Caldera, PhD, D(ABMM)
Alex Sundermann, DrPH @sundermannaj.bsky.social · 21/01/2025
Just did a lecture on COVID-19/surveillance systems in my infectious disease epidemiology course. Withdrawing would be a major blow to global #PublicHealth... From @sherylnyt.bsky.social in @nytimes.com www.nytimes.com/2025/01/20/u...
nytimes.com
Trump Withdraws U.S. from World Health Organization
Public health experts say U.S. withdrawal from the W.H.O. would undermine the nation’s standing as a global health leader and make it harder to fight the next pandemic.
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 26/12/2024
Happy holidays, #ClinMicro!
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 19/12/2024
Read it here: www.ajicjournal.org/article/S019... #ClinMicro #IDSky
ajicjournal.org
Cluster of Extensively Drug-Resistant Shigella sonnei Carrying blaCTX-M-15 in Los Angeles, California, 2023-2024
We describe 3 cases of extensively drug-resistant (XDR) Shigella sonnei infections among men who have sex with men (MSM) in Los Angeles, CA. Using whole-genome sequencing, we determined that they are highly genetically related, exhibit similar antimicrobial resistomes, and appear to be distinct from other circulating strains. These cases highlight the rapid expansion of XDR Shigella in the U.S. and urgent need for appropriate detection and management.
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 17/12/2024
I former colleague of mine said our article was picked up by his favorite tech site! And here it is! 😯😁 #ClinMicro #IDSky
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Reposted by JR Caldera, PhD, D(ABMM)
ᐯIᑕTOᖇ ᑎIᘔET, ᗰᗪ @nizet.bsky.social · 16/12/2024
Led by Chih-Ming Tsai + Irshad Hasham, a fascinating new JCI paper from the George Liu Lab at UCSD Pediatrics shows that in mice who have previous Staphylococcus aureus (SA) exposure, B cells secrete abundant IL-10 when challenged with the SA antigens for a second time (in a vaccine) Thread🧵 1 of 2
scitechdaily.com
Staph Vaccines Keep Failing and Scientists Finally Know Why
Researchers at UC San Diego have identified a key mechanism by which Staphylococcus aureus evades the immune response, leading to the failure of numerous vaccine trials. The bacteria triggers an overp...
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 14/12/2024
Read it here: linkinghub.elsevier.com/retrieve/pii...
linkinghub.elsevier.com
Redirecting
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 11/12/2024
Is #WormWednesday a thing? Cuz this is my favorite parasit. consult. Again, I don't think it came as a consult, more like Path sharing "look what we found!!!" #ClinMicro #IDSky
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 10/12/2024
🚨new pub alert! Not so gentle reminder that CDC recommends the use of antimicrobial susceptibility results to direct antibiotic therapy against Shigellosis if treatment is warranted. PCR isn't always enough, guys and gals! #ClinMicro #IDsky linkinghub.elsevier.com/retrieve/pii...
AJIC: Cluster of XDR Shigella sonnei Carrying blaCTX-M-15 in LA, 2023-2024.
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Reposted by JR Caldera, PhD, D(ABMM)
Logan Patterson, PhD, D(ABMM) @loganpatterson.bsky.social · 12/11/2024
As the great migration from Twitter to Bluesky begins, I have created the "Clinical Microbiology" starter pack to help you find your colleagues. Please let me know if you would like to be added! go.bsky.app/VTpSjBL
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 06/12/2024
🫣🤭 I let it go, but make a mental note 😉
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 06/12/2024
@uclapathology.bsky.social made it to Bluesky! #ClinMicro #IDsky
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Reposted by JR Caldera, PhD, D(ABMM)
Bryan White, MS Bio, MPH 🧬 @crvscience.com · 05/12/2024
New report out today in science 🧪🛟 www.science.org/doi/10.1126/...
science.org
A single mutation in bovine influenza H5N1 hemagglutinin switches specificity to human receptors
In 2024, several human infections with highly pathogenic clade 2.3.4.4b bovine influenza H5N1 viruses in the United States raised concerns about their capability for bovine-to-human or even human-to-h...
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 04/12/2024
Spent 5years in grad school studying antibodies, but I still have to draw it out for myself. 😅🤭 FYI: that's how you properly draw an antibody 😂 #ClinMicro
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 25/11/2024
Still one of my favorite photos! I don't even think this came as a consult, more like Path sharing "hey look what we found!" You can actually see fully formed and preserved sporangia 😯 #MycologyMonday #ClinMicro
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 19/11/2024
"Let's defund infectious diseases," they said. 🙄 ironically, my job security relies on people thinking they don't need us. the difference is whether we do it to prevent or to control. #ClinMicro #IDSky www.cdph.ca.gov/Programs/OPA...
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 18/11/2024
CDC LOCS call re: MPOX happening now! #clinmicro #IDsky
cdc.gov
11/15/2024: Lab Update: Join the next Laboratory Outreach Communication System (LOCS) Call on Monday, November 18 at 3:00 PMMinusSASstats
CDC’s gateway to interact with U.S. clinical laboratories. Currently, LOCS is a functional CDC mailbox designed to provide updates and answer questions from clinical laboratories through coordination ...
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JR Caldera, PhD, D(ABMM) @jrcaldera.bsky.social · 18/11/2024
😔😞
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