Enlarge / Chicken eggs are disposed of at a quarantined farm with bird flu in Israel's northern village of Margaliot on January 3, 2022. (credit: Getty | JALAA MAREY )

The flare-up of highly pathogenic bird flu continues to widen in US livestock after federal officials confirmed last week that the virus has spread to US cows for the first time. The virus has now been detected in dairy cows in at least five states , a single person in Texas exposed to infected cows, and an egg farm in Texas, all spurring yet more intense monitoring and biosecurity vigilance as the situation continues to evolve.

As of Tuesday, seven dairy herds in Texas, two in Kansas, and one each in Idaho, Michigan, and New Mexico had tested positive for the virus. The affected dairy herd in Michigan had recently received cows from one of the infected herds in Texas. It remains unclear if there is cow-to-cow transmission of the flu virus.

The virus—a highly pathogenic H5N1 avian influenza or HPAI—has been devastating wild birds worldwide for the past several years. Throughout the devastating outbreak, the flu virus has spilled over to various species , including big cats in zoos, river otters, bears, dolphins, seals, squirrels, and foxes. While cows were an unexpected addition to the list, federal officials noted last week that affected dairy farms had found dead wild birds on their farms, suggesting that wild birds introduced the virus to the cows, not an intermediate host.

Enlarge / A billboard from the AIDS Healthcare Foundation is seen on Sunset Boulevard in Hollywood, California, on May 29, 2018, warning of a drug-resistant gonorrhea. (credit: Getty | )

Health officials have long warned that gonorrhea is becoming more and more resistant to all the antibiotic drugs we have to fight it. Last year, the US reached a grim landmark : For the first time, two unrelated people in Massachusetts were found to have gonorrhea infections with complete or reduced susceptibility to every drug in our arsenal, including the frontline drug ceftriaxone. Luckily, they were still able to be cured with high-dose injections of ceftriaxone. But, as the US Centers for Disease Control and Prevention bluntly notes: "Little now stands between us and untreatable gonorrhea."

If public health alarm bells could somehow hit a higher pitch, a study published Thursday from researchers in China would certainly accomplish it. The study surveyed gonorrhea bacterial isolates— Neisseria gonorrhoeae —from around the country and found that the prevalence of ceftriaxone-resistant isolates nearly tripled between 2017 and 2021. Ceftriaxone-resistant strains made up roughly 8 percent of the nearly 3,000 bacterial isolates collected from gonorrhea infections in 2022. That's up from just under 3 percent in 2017. The study appears in the CDC's Morbidity and Mortality Weekly Report.

While those single-digit percentages may seem low, compared to other countries they're extremely high. In the US, for instance, the prevalence of ceftriaxone-resistant strains never went above 0.2 percent between 2017 and 2021 , according to the CDC. In Canada, ceftriaxone-resistance was stable at 0.6 percent between 2017 and 2021. The United Kingdom had a prevalence of 0.21 percent in 2022.

Enlarge / Chickenpox on a 1-year-old. (credit: BSIP/UIG Via Getty Images )

Thanks to the vaccination program that began in 1995, chickenpox is now relatively rare. Cases of the miserable, itchy condition have fallen more than 97 percent. But, while children have largely put the oatmeal baths and oven mitts behind them, doctors have apparently let their diagnostic skills get a little crusty.

According to a study published Thursday , public health researchers in Minnesota found that 55 percent of people diagnosed with chickenpox based on their symptoms were actually negative for the varicella-zoster virus, the virus that causes chickenpox. The study noted that the people were all diagnosed in person by health care providers in medical facilities. But, instead of chickenpox, lab testing showed that some of the patients were actually infected with an enterovirus, which can cause a rash, or the herpes simplex virus 1, which causes cold sores.

The study, published in the Centers for Disease Control and Prevention's Morbidity and Mortality Weekly Report, supports expanding laboratory testing for suspected chickenpox cases in the state's program and highlights that diagnoses based on symptoms are "unreliable."

Enlarge / A view from a hospital as children receiving medical treatment, in capital Kabul, Afghanistan on April 18, 2022. More than 130 children have died from the measles in Afghanistan since the beginning of this year. (credit: Getty | Sayed Khodaiberdi Sadat )

The Centers for Disease Control and Prevention and the American Medical Association sent out separate but similar pleas on Monday for unvaccinated Americans to get vaccinated against the extremely contagious measles virus as vaccination rates have slipped, cases are rising globally and nationally , and the spring-break travel period is beginning.

In the first 12 weeks of 2024, US measles cases have already matched and likely exceeded the case total for all of 2023. According to the CDC, there were 58 measles cases reported from 17 states as of March 14 . But media tallies indicate there have been more cases since then, with at least 60 cases now in total , according to CBS News. In 2023, there were 58 cases in 20 states.

"As evident from the confirmed measles cases reported in 17 states so far this year, when individuals are not immunized as a matter of personal preference or misinformation, they put themselves and others at risk of disease—including children too young to be vaccinated, cancer patients, and other immunocompromised people," AMA President Jesse Ehrenfeld said in a statement urging vaccination Monday.

Enlarge / Mature morel mushrooms in a greenhouse at an agriculture garden in Zhenbeibu Town of Xixia District of Yinchuan, northwest China's Ningxia Hui Autonomous Region. (credit: Getty | Xinhua/Wang Peng )

True morel mushrooms are widely considered a prized delicacy, often pricey and surely safe to eat. But these spongey, earthy forest gems have a mysterious dark side—one that, on occasion, can turn deadly, highlighting just how little we know about morels and fungi generally.

On Thursday, Montana health officials published an outbreak analysis of poisonings linked to the honeycombed fungi in March and April of last year. The outbreak sickened 51 people who ate at the same restaurant, sending four to the emergency department. Three were hospitalized and two died. Though the health officials didn't name the restaurant in their report, state and local health departments at the time identified it as Dave’s Sushi in Bozeman . The report is published in the Centers for Disease Control and Prevention's Morbidity and Mortality Weekly Report.

The outbreak coincided with the sushi restaurant introducing a new item: a "special sushi roll" that contained salmon and morel mushrooms. The morels were a new menu ingredient for Dave's. They were served two ways: On April 8, the morels were served partially cooked, with a hot, boiled sauce poured over the raw mushrooms and left to marinate for 75 minutes; and on April 17, they were served uncooked and cold-marinated.

Enlarge (credit: Getty | Thomas Trutschel )

Just because something is safe to eat or drink doesn't mean it's safe to squirt deep inside your face, like your sinus cavities and eye sockets, researchers at the Centers for Disease Control and Prevention would like to remind you.

In a study published Wednesday in Emerging Infectious Diseases , CDC researchers looked at 10 cases where people developed life-threatening amoeba infections after cleaning out their sinuses, often with tap water via neti pots and squirt bottles. Such infections are relatively rare, but the number of people at risk of them is perhaps much greater than one might expect.

In a survey study published last year , researchers found that an alarming number of people in the US were completely misinformed about the safety of tap water for home medical uses. For instance, 33 percent of people incorrectly believed that US tap water is sterile, containing no living bacteria or other germs. Moreover, 62 percent of people wrongly thought it was safe to use tap water for rinsing your sinuses, 50 percent said it was safe for rinsing contact lenses, and 42 percent thought it was safe for cleaning respiratory devices.

Enlarge / A brightly colored transmission microscope image of measles viruses. (credit: Getty | BSIP )

A team of health experts from the Centers for Disease Control and Prevention arrived in Chicago Tuesday to help respond to a flare-up of measles cases at a migrant shelter in the city's Pilsen neighborhood, according to CNN .

So far, there have been four cases identified at the Halsted Street shelter: two young children, one recovered and one hospitalized in good condition as of March 10; and according to an announcement on Monday, March 11 , two adults who were reported in good condition.

The four cases come just days after the city's health department announced a measles case in a Chicago resident with no recent travel outside of the city and no reported connection with the shelter. The case, announced on March 7 , was the first measles case identified in the city since 2019, officials noted. It remains unclear how that resident contracted the highly infectious virus, though the health department noted that the person had been in contact with domestic and international travelers. The person was said to be recovering well at home, and their infectious period ended on March 6.

Enlarge / Cinnamon (Photo by Hoberman Collection/Universal Images Group via Getty Images) (credit: Getty | Hoberman Collection )

Six different ground cinnamon products sold at retailers including Save A Lot, Dollar Tree, and Family Dollar contain elevated levels of lead and should be recalled and thrown away immediately, the US Food and Drug Administration announced Wednesday.

The brands are La Fiesta, Marcum, MK, Swad, Supreme Tradition, and El Chilar, and the products are sold in plastic spice bottles or in bags at various retailers. The FDA has contacted the manufacturers to urge them to issue voluntary recalls, though it has not been able to reach one of the firms, MTCI, which distributes the MK-branded cinnamon.

Products identified by the FDA as containing elevated lead levels. (credit: FDA )

The announcement comes amid a nationwide outbreak of lead poisoning in young children linked to cinnamon applesauce pouches contaminated with lead and chromium. In that case, it's believed that a spice grinder in Ecuador intentionally added extreme levels of lead chromate to cinnamon imported from Sri Lanka, likely to improve its weight and/or appearance. Food manufacturer Austrofoods then added the heavily contaminated cinnamon, without any testing, to cinnamon applesauce pouches marketed to toddlers and young children across the US. In the latest update , the Centers for Disease Control and Prevention has identified 468 cases of lead poisoning that have been linked to the cinnamon applesauce pouches. The cases span 44 states and are mostly in very young children.

Enlarge / A view of the Centers for Disease Control and Prevention headquarters in Atlanta. (credit: Getty | Nathan Posner )

COVID-19 is becoming more like the flu and, as such, no longer requires its own virus-specific health rules, the Centers for Disease Control and Prevention said Friday alongside the release of a unified " respiratory virus guide ."

In a lengthy background document , the agency laid out its rationale for consolidating COVID-19 guidance into general guidance for respiratory viruses—including influenza, RSV, adenoviruses, rhinoviruses, enteroviruses, and others, though specifically not measles. The agency also noted the guidance does not apply to health care settings and outbreak scenarios.

"COVID-19 remains an important public health threat, but it is no longer the emergency that it once was, and its health impacts increasingly resemble those of other respiratory viral illnesses, including influenza and RSV," the agency wrote.